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XPS 15 9550 External Monitor Screen Flicker Through Thunderbolt 3 Port

Q: XPS 15 9550 External Monitor Screen Flicker Through Thunderbolt 3 Port

I recently purchased an XPS 15 9550 with i7, 16 GB RAM, 256 GB SSD, and GTX 960m dGPU that I have connected to a 27-inch QNIX qx2710 2560x1440p external monitor. I have this connected through a Cable Matters USB-C/Thunderbolt 3 to DVI-D adapter and cable.
The monitor and everything seem to work fine at 60hz, except for every time I unplug, turn on, or restart the monitor/computer the first five or ten minutes of use is plagued with constant screen flickering and flashing. After ~five minutes the monitor seems to stabilize and will only rarely have a single screen flicker.
I have read other forum threads describing similar issues with different monitors/cable setups and that there is likely an issue between the wifi card and thunderbolt port. The common recommendation is to turn down the wifi output percent to 75%, however the Killer wifi card on this computer does not have an option under advanced settings to turn down the power output. Has anyone had any luck doing this on a recently purchased XPS 15 with the Killer wifi card?
The cables and adapters are new and the BIOS and all drivers are up to date. Other than the wifi issue, does anyone have suggestions or solutions to this screen flickering problem?

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Preferred Solution: XPS 15 9550 External Monitor Screen Flicker Through Thunderbolt 3 Port

I recommend downloading and running DAP. It can help sort out any driver and firmware related issues on your system

It's worked out well for many of us in the past.

You can download it direct from this link http://downloaddap.org. (This link will open the download page of DAP so you can save a copy to your computer.)


On the XPS 15 9550, can an external monitor with Displayport inputs be connect directly into the laptop's USB-C Thunderbolt output using a straight miniDisplayport-to-Displayport cable?  Similarly, can a miniDisplayPort to VGA adapter cable be plugged directly into the USB-C Thunderbolt port to drive older monitors/projectors? Or is the TB15 Dock mandatory in order to get the computer talking to  external video devices through its Thunderbolt port output?

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I myself own an XPS 15 9550 and noticed that I was not getting the full Thunderbolt 3 speedover it's Thunderbolt 3 port. I expected speeds around 2700MB/s, because of the overhead withthe theoretical gross speed of 3870MB/s, but I only ever got 1400MB/s out of it.
I did some digging and found out that none of the XPS notebooks with Thunderbolt 3 are evenable to achieve the full TB3 speeds, because they are only connected with two PCI Express lanes (x2.3).You can read more about this on the following links:Dell Subreddit PostChipset Digging on Forum

Thunderbolt 3 and the promised speeds were the MAIN REASON I even bought this notebook.I feel very cheated here.

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Hello - I wish to connect my 24" Dell monitor (it has every port imaginable) to my Lenovo Yoga 720 WITHOUT using the Thunderbolt port. Is this possible? I am a Jazz musician and I with to use the external display for (1) reading complicatedf [e.g., classical piano] sheet music and (2) for use with DAWs (digital audio workstations, such as Abelton, Pro Tools, etc., where there is LOTS of info crammed in tight and a large monitor is needed). My Yoga's TB port is used for a 500 gig Samsung external hard drive.  The Samsung houses my music programs (e.g., the DAWs, Ivory piano, Easy Drummer, etc.), and I placed them there for the fast speed (this really helps eliminate the latency on the pianos).  I don't need fast speed with the monitor; my prior Lenovo G780 worked just fine with my 24" Dell monitor; the G780 had an HDMI port. I don't find a "TB dock" that has (1) HDMI, display port, etc. AND (2) another TB port.  Does such a thing exist? I've tried the crappy "USB montitors."  They (1) suck and (2) are not 24". Am I screwed here? Thanks, - Jeff Newton (Jazz saxophonist and pianist)    

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I bought a Dell XPS 13 9350 in December and I wanted to connect it to an external monitor via the thunderbolt port. I bought an type c to hdmi adapter off amazon and it connects. (Actually bought 2 and the problem persists). But occasionally both my screen and laptop will turn black then back on again. This causes my video that i'm playing to either freeze/crash (netflix/youtube) which is SUPER annoying. It goes from occasional to quite often. It's really random.

My drivers are up to date, cable is new and the monitor is new from boxing day. 

Any help is appreciated :)

A:Dell XPS 13 9350 Connecting external monitor via thunderbolt port

There are several posts on this forum about this issue.

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When I connect my Dell XPS 13 9350 laptop with QHD display to an external monitor through the DA200 USB-C to HDMI connector the external monitors flicker constantly (laptop is fine-no flickering). Sometimes it works for like an hour then starts to flicker or longer so its not consistent. Below are the troubleshooting steps Dell has walked me through (including sending me a new DA200 part) to no avail:
- Dell has sent me a new DA200 USB C to HDMI part
- They have upgraded the Thunderbolt drivers and all other relevant drivers to latest ones (as of June 15 2016)
- I have tried on different monitors (5-6) and tried different HDMI cables.
Dell doesnt seem to know what to do now. THey have refunded my DA200 part purchase and told me to buy a separate HDMI to USB-C cable to test. If that fails it seems they will replace the motherboard. They say it could be an issue with the external monitors not being compatible with QHD, but this is not documented anywhere (they admit) and I havent heard anyone else having this problem on the internet and surprised every single person using this setup has QHD external monitors. This is an unworkable situation for me as I work in PC labs all day connected to external monitors.
Any advice? 

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I have a Dell Latitude E6410 running Win 7 Professional (64-bit). I have it connected to an external monitor. Whether I choose "projector" or the option to show on both screens, the monitor on the laptop will flicker. Here's more specific information that may be helpful:

The laptop and a desktop are both connected to a KVM switch. I set the laptop to "projector" mode so that it will, of course, project on to the main monitor. When I am accessing the laptop via the KVM switch, I see its display on the main monitor just fine. However, if I switch to the desktop, the laptop screen will intermittently come on and off. This happens over and over. That is what I describe as the "flickering." It's very annoying as I work from home and each time the laptop screen goes off and on, I hear a beep in my headset.

The laptop uses Intel HD graphics. The driver date is 01/30/2013 and version is The laptop resolution is set to 1024 x 768 with a refresh rate of 60. Windows does not find a newer version of the graphics driver when doing a search. The laptop will also give this message when flickering:

Optimal Resolution Notification
This is not the optimal display resolution for the primary display device. The optimal resolution is 1280 x 800. Click this notification for more information.

Keep in mind this ONLY happens when the laptop is NOT being accessed on the main monitor on the KVM switch. If it is, its screen does NOT flicker.... Read more

A:Intermittent screen flicker when laptop connects to external monitor

After connecting to the projector, change the resolution to 1024*768

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I have a Dell Inspiron 15 7568 laptop that is less than a week old. I also purchased a Dell HDMI to VGA adapter so that I can use an external monitor with a VGA input as a 2nd screen. 
Whenever I connect to the external monitor my laptop screen, not my external monitor screen, flickers a couple of times a minute. I have checked all the connections of the adapter and VGA port and they seem fine. It appears there is a problem that is encountered when I plug in the external monitor that causes the laptop screen to flicker occasionally. 
If anyone has any suggestions to fix this issue it would be greatly appreciated.
Thank you.  

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I'm having issues getting the TB16 to work with the XPS 15 9550. I successfully installed all the drivers in the proper order as documented prior to plugging in the TB16 for the first time.

I've verified that I indeed do have a Thundrerbolt port - there is a Thunderbolt symbol next to the USB-C port.
When I do plug in the TB16 the power button on it will power the system off/on.
I've used a usb-c to Displayport adapter and a usb-c to usb 3.0 adapter with a flash drive. Both worked successfully so the basic functionality of the usb-c port is working.

When I plug in the TB16 I never got an authentication window pop-up. In the Thunderbolt software it shows no attached devices.

The details setting in the Thunderbolt software looks fine, it appears to have the proper driver and firmware levels.

When I check the Thunderbolt driver it says that 'the hardware device is not connected to the computer'.
I'm at a loss - everything looks good except for the fact that nothing happens when I plugin the TB16. I'm wondering if there's a hardware problem with the Thunderbolt controller itself? I'd appreciate any help that anyone can give me.

A:XPS 15 9550 - Thunderbolt port not working - TB16

You might open the Thunderbolt software and set it to allow all devices.  I reset my system and redid the TB16 and it shows the cable and dock as approved devices.
It was not hard for me.  The thunderbolt controller is on the computer.  You show some correct info for that controller, although since I have a 9365, that specific info may be different, but you do show a different controller generation..

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There have been several reports of the Thunderbolt 3 port on the XPS 15 9550 (and 13 9350) being configured to a PCI 2x port instead of the more usual PCI 4X port. Users have been reporting speeds of up to 16 Gbps, only half of the advertised speed (40 Gbps) which should be 32 Gbps (with overheads) for data.
The result is significantly TB reduced performance to comparable machines, especially when using an external GPU set up.
If this is not hardwarematically configured as such, it may be possible this could be fixed with a firmware update. Will this be coming?

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I have a display setting of 1920 x 1080 with 125% DPI scaling on my XPS 15 9550 with 4K UHD screen. 
When I connect it to my external monitor with the same maximum resolution of 1920 x 1080 using the "second screen only" option under "Project" of Windows 10, everything seems to look smaller than typical 1920 x 1080 resolution.  When I troubleshooted, the only option I could manage was to use the "duplicate" option instead of "second screen only" option.  If anyone knows how to do it, please share with me.  Thanks!

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Bought DELL XPS 15-9550 with intel Core i7, 16G RAM, 1TB SSD HD, with Nvidia-GeForce GTX 960M from Best Buy last November.
Connected to external monitor HP2311xi through the HDMI.
Everytime need to set up display as 2 display, HP as Main and laptop as extended. Then every 5 to 6 min, the system reverted back to single display by first blanking the screens.
Reset the display by clicking detect and the laptop screen come back alive, and then after 5 to 6 same thing happened
Talk to Geek Squad. Change the cable, update the Intel HD graphics drive, reinstall and uninstall. Still happening
Update BIOS to the latest available still not solve the issue
Even after letting it in single display mode, the blanking keep continue. It is very annoying and distracting while working.
Any one encounter the same issue.  Please share the resolution
Thank you

A:Dell XPS 15-9550 with External Monitor HP2311xi - keep getting blank screen on and off -

I am having the same issue with my XPS 15-9550 with Nvidia combined graphics connected to a Dell UP3216Q external monitor.
Typically when interacting with apps, i.e. scrolling in MS Edge browser, the external monitor blacks out for a few seconds. It is very intermittent, and tends to occur several times within a 30 second period then it will stop for a while. Acts like bad HDMI cable connection. I have the same issue with multiple cables, although it could be the receiving connector on either the laptop or the monitor.
Have changed drivers on both the Nvida and intel adapters with no change in behavior. Changed resolution, frame rate, etc.
The problem renders the system unusealbe and I will have to return both the laptop and display if not resolved soon.

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Dell just release a new Thunderbolt firmware ,A07
I installed it, and it seems to have destroyed my external HDMI port.
I tested it with different monitors and cables.
On some monitors the colors are inverted (white goes black). Some monitors don't display anything.

I hope the upgrade caused no hardware defect to the HDMI port.
Unfortunately I cannot find the old Thunderbolt firmware to got back.


A:XPS 9550: Latest Thunderbolt firmware upgrade destroys HDMI port

Same. Installed the new firmware successfully, restarted and now my HDMI port is more or less dead. The Laptop still detects the external monitor but it won't output anything.
Tried reinstalling the Intel HD Graphics driver, changing resolution, different cable, different monitor... nothing helps.

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After the time spent with Dell Support doing diagnostics and updating video drivers to those official Dell drivers on the support page, my new XPS 15 9550 with 4K touch display continues to struggle when using external monitors. I have two (2) Dell U2515H monitors.
I have updated ALL of the drivers and BIOS to the very latest files available on the Dell support page, including the newest Thunderbolt 3 driver.
When the laptop is NOT connected to any external monitors, I am NOT experiencing any trouble.
When the laptop is connected to ONE external monitor via the onboard HDMI port, I am NOT experiencing any trouble.
Trouble begins with the addition of ANY external monitor via the USB-C/Thunderbolt 3 port.
I have experimented with the following three adapters, all producing the same result:

Dell USB-C to HDMI (2.0), part number 047KD7
Dell USB-C Port DA200, part number 5KMR3 REVA00
Cable Matters USB-C to DisplayPort
First, regardless of which adapter. my laptop ramps up the fan for as long as the adapter is present.

Second, although the monitor works with any of the adapters at the proper resolution, all of the screens will go black about every 10-20 minutes and the displays will seem to resize and reset. In this process, about half of the time, the windows open on the monitor connected to the USB-C/Thunderbolt 3 port will either minimize or relocate to the primary display (the laptop screen). However, the laptop itself doesn't freeze. I tried running a YouTube video t... Read more

A:Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

This is apparently a problem with the Thunderbolt 3 driver/firmware and/or the Intel 530 graphics drivers. I see very similar issues using Dells new TB15 Thunderbolt 3 Dock. Normally when I'm in my home office I use my 9550 with the lid closed using an external monitor connected to the HDMI port. All works perfectly. When I try to use the Dell Thunderbolt 3 Dock and connect my external display to its HDMI port it is unstable. Sometimes the external screen goes blank for a few seconds. When the system wakes up from sleep or I reboot it it does not come up on the external display but I have to open the laptop and switch back to the external monitor. Basically it is unusable. Still waiting for Dell to fix the issues.

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Might be helpful for people to know, but I have been struggling for days with a flickering thinkvision p24h usb c monitor connected to my lenovo x1 carbon 5th generation. Flickers, sometimes goes into power saving mode even when it should be active. I updated all sort of graphics drivers with no success.  Finally, i deleted the thunderbolt 15d2 driver and it fixed the monitor problem. Then lenovo system update reinstalled the driver and the problem resumed. Flickering, power save mode resumed sometimes (thinking the monitor was not receiving a signal), unstable screen as well. And upon removal of the driver again, and disabling installation of recommended updates, the problem is fixed. Frustrated that an update caused this issue, and relieved it has now been fixed. Just wanted to share the solution, or help make lenovo aware. I do believe it is a windows 1903 issues related to the thunderbolt 15d2 driver.  

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After installing the new bios update, the screen flickers every few seconds.  After rolling back to previous bios, the problem went away.

A:XPS 9550 4K screen flicker with new bios

Simple answer is the latest bios is not for your configuration. Bios updates are for specific problems and specific configurations of the same model. If it ain't broke, don't fix it.

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In the last two or three days whenever I turn my laptop on or wake it up from sleep mode the screen flickers black or white for one second for a time. This only happens for 15 seconds or so but I occasionally get an error message informing me that I have to restart. I have not updated the laptop in the last few days and all my drivers are up to date.
Here's a video of this happening. After 15 seconds or so it either stops itself or restarts the computer. 
I have already disabled panel self-refresh and that did not help.
Just wondering what causes this and if there is a fix for it?

A:XPS 9550 screen flicker when waking up

I have the same thing happening to my XPS 9550. I downloaded some updates from Dell yesterday but it did not fix it.

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My problem is: The external monitor (DELL 2715, 4K) is connected to ThinkPad P1 via Thunderbolt 3 dock station. Then the cover of notebook is closed, I move the app window by mouse, the window moves twitching. Then the cover is open, images on both screens, internal and external, are identical (clone mode), the window move very quick and smooth, like normal.Also, if I see the video with closed cover, the video is twitching, but the cover is open, all the ok.What is the solution of this problem? I need work on extarnal display with closed notebook cover. Thank You!

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For some reason I get a screen flicker that is noticeable and irritating. It happens with every BIOS after 1.2.00. Not sure why, but if I want to get rid of screen flicker I have to back to BIOS 1.2.00. Has anyone else experienced this problem and/or found a fix? I think it is rather unacceptable for a $2,200 laptop with a 4K screen to have screen flicker issues and for it to continue to be a problem with the last three BIOS releases.

A:Dell XPS 15 9550 Screen Flicker BIOS

Hi JPlugaru,
Thank you for reaching out to Dell Community Forum.
Please run the LCD BIST and check if the issue is replicated on this test:
Please click my DELL-username and send me a Private Message with the Dell Service Tag number and your email address.
Note: please don't mention the service tag or email id on the public forum as it contains your personal information

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I am new and this is my first post.
I have had a random screen flicker that happens when i am on the internet, one or two times a week. happen after a driver up date i think. I installed the newest driver for the Intel 530  chip set  to fix the problem when i did that the screen flicker like made until it clicked install new driver and finish, but the screen still flickers but only one time now week it seems 
Any ideas ? should i return the laptop or is it a driver problem
Ask anything i with answer as best as possible  
 Thanks, Tim   Sorry about  my spelling I am dyslexic

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I have an XPS 15 9550 laptop with 4K screen. I installed the recently released BIOS update which is supposed to address the flickering screen issue. Previously I only ever experienced some minor intermittent flicker at brightness level 0 but after the update, flickering was occurring quite frequently - I checked this upto brightness level 50% and it occurs at all the way up.
It appears the update has made things much much worse Luckily I managed to roll back to A06 which must be the previous release as its the only one on the downloads page.
Anyone else find the update made things much worse?
Be good to know what Dell is doing to sort this out (again).


It has happened to my XPS 15 9550 4K as well after the bios update. I cannot work because of this terrible screen flickering. How could you roll back to previous version? Did you call the customer support? Thanks.

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I have a XPS 15 9550 FHD laptop with all the latest drivers and updates applied.
When I turn on my laptop after enter the password and login, my screen flicker in a few minutes, sometime I have problem with blue screen with error: igdkmd64.sys, stop code: VIDEO_TDR_FAILURE. And I have find some information about it. I knows it happen because the graphics and when I open the devices manager I see the drive of Intel High Definition DSP is missed and I cant find or update it.What is this, do I need it and where can I find a driver and solve it please? Thanks!

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I've had my XPS 15 9550 for about a month and ever since I've bought it I have been having issues. The major problem I had to start off with has been with the wifi. I have issues every once in awhile with the wifi disconnecting and timing out, and it's more of a problem at certain times than others. That's problem number one. Here's problem number two... the best way I can describe the issues with the screen is a subtle change in the screen brightness where it seems like it's flickering. It's subtle, but is very obvious when it does this. From my research and work on this issue, I BELIEVE it's a driver issue, and not hardware related. However, I won't hold my breath on that. I have tried every troubleshooting method in the book. I've tried everything from updating drivers, downgrading drivers, factory resetting the computer, reading hours worth of forums and no little tweak here or there has worked for me.
If these issues cannot be worked out, I hope Dell can refund me because spending $2,500 on something that I've had relentless issues with is not acceptable.


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Also for me the problem persists
BIOS version is 1.2.14
NVidia driver version 375.63

Fixed with BIOS 1.2.0

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About 3 months old but problems from new (this is my second unit, first arrived with broken touchpad)

I get the following error message approx every 10/15 minutes
"Display driver stopped responding and has recovered. Display driver Intel HD Graphics drivers for Windows(R) stopped responding and has successfully recovered"
Worse than this, is the constant flickering on the screen, as if some sort of 'auto level' is measuring room ambient and constantly adjusting the screen.
Calibration was also WAY out on arrival. I have calibrated using Spyder colormeter and display colour is now good.
On mid grey screen, the imminence levels are VERY patchy across the screen
Am considering rejecting under Sale of Goods Act as not fit for purpose.

A:XPS 9550 Intel driver crashes and terrible screen flicker

1. What BIOS version do you have? The latest one (v1.20.10) has display issues.
2. What version of the Intel Intel HD Graphics do you have installed?

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I'm wondering if someone possibly help as I'm not sure where to go next.

I have a Dell U2311H monitor connected to a XFX Radeon 6850 via its DisplayPort and I'm having problems with random flickering where the monitor picture goes black for a few seconds.

I have another monitor, an old HP, connected via DVI and a 1080p Sony LCD TV connected via HDMI.

I have had the Dell and HP monitors connected via DVI for months without any problems but I wanted to extend my Win 7 desktop to all 3 displays and I believe you can't do that using DVI, DVI and HDMI, hence why I want to use the display port.

I have tried 2 different displayport cables, so I don't think it is that. I don't have another gfx card or monitor to try to eliminate from the process.

One thing I did notice is that if I change the resolution from 1080p to 720p it seems to fix the problem. I'm wondering if it could be something to do with the displays running at different resolutions? Although I did try both the TV and Dell running at 1080p but there was still a problem.

Any suggestions greatly received,


A:Display port flicker on Dell U2311H monitor


I happen to see this thread when searching for solution for the same problem. I am using 3 monitor display setup, using U2311H connected with displayport to HD 5770 graphic card and 2 samsung 940b monitor connected with DVI to the same HD 5770 graphic card.

U2311H flickers (screen become totally black) for 1 to 2 sec at random times and return to normal.

I did not try any other display port cable yet because I did not have time to buy another one.

Seems like adbarnes have the same problem, I am wondering if it is because we are using 3 display setup? or display port? Or maybe there is something wrong with U2311h?

I have been using U2311H for some time, this flicker problem happens recently.

adbarnes, have you discovered how to solve the flicker problem?

My dell U2311H is using 1920x1080 (recommended) resolution
My samsung 940B is using 1280x1024 (recommended) resolution
(all using the recommended resolutions)
using win 7

Thanks everyone for helping

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Hi, I have an Thinkpad X1 Carbon 6th gen, 20KG. (with Intel UHD Graphics 620)I recently bought an external 4k monitor (HP Z27).The monitor provides the following ports:1 DisplayPort? 1.2; 1 mini DisplayPort? 1.2; 1 HDMI 2.0; 1 USB Type-C? (Alternative mode DisplayPort? 1.2, power delivery up to 65 W)  I tried connecting from my laptop's USB C port to by monitor's USB C port. The display is detected, the image shows up at [email protected] then in a couple of seconds the external monitor loses connectivity and turns off while the thinkpad power button starts blinking intermmitently for a couple of seconds. Then it usually resumes connectivity with the monitor and after a few seconds the whole process of disconnecting and flickering is repeated rendering the whole setup unusable. I can connect without issues via the HDMI 1.4 port on Lenovo X1 Carbon to the HDMI 2.0 port on the monitor. I use a HDMI 2.0 cable. This setup works but only allows [email protected] which is unnacceptably laggy.  I did try a couple of things without any success:- Updating all drivers including flashing the latest BIOS. My current system information is:- Windows 10 PRO x64 10.0.17134 - Display adapter driver version is (9/14/2018). - BIOS version N23ET59W (11/8/2018)- Monitor driver is HP (10/27/2017) Please help or advice what I could do get a [email protected] Hz setup?  I also tought of buying a Lenovo USB C to HDMI 2.0 or USB C to Display port adapter but it would ... Read more

A:External 4k monitor flicker and disconnect via USB C

There are two USB-C ports on the laptop; both are also TB3 ports (USB-C alt mode). There are hubs/docks that can pass the charger's power and Displayport via the same cable (and some monitors has native support for this, like Lenovo's P24h & P27h). EDIT: I somewhat misread your question. I'd look into why the HP Z27 is not working via USB-C. You still do have 2 USB-C ports on the laptop. EDIT2: Did the monitor come with its own USB-C cable? USB-C DP Alt Mode + Power Delivery (the two functions you are looking for) requires a full USB-C cable, with all of the pins present. A lot of USB-C cables (sometimes called, "USB-C 2.0 charging cables," or something like that) don't connect all of the pins, simply to save a bit of cost. Usually, a monitor of this type should supply one working cable. EDIT3: Just my own observation (so I can very likley be wrong), it appears to be a common issue with HP monitors not working well with USB-C.

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Because I didn't liked USB 3.0 ethernet chipsets and USB-based ethernet cannot bear some network-intensive tasks, I wanted to use PCIe-based Thunderbolt ethernet controller on my XPS 15 9550. As there is no Thunderbolt 3 "PCIe" ethernet adapter (except docks), I chose to buy Apple Thunderbolt 3 to 2 adapter and Thunderbolt 2-based ethernet adapter.
I plugged it into the XPS 15 9550 (tested with BIOS 1.1.19, 1.2.14, 1.2.16 and latest Thunderbolt firmware with NVM version 16), and the PCIe device did not pop up. Instead, only USB billboard device is appearing saying that "Alternate Mode configuration not attempted". Both Windows 10 and Ubuntu 16.10 failed to detect the device. I moved this configuration to MSI GS63 laptop, and it detected ethernet controller successfully (that laptop utilizing NVM firmware version 18).
It seems that other vendors are affected with lower NVM firmware version involving setup with Thunderbolt adapter: see the case of Lenovo too. Do you have planned Thunderbolt NVM firmware update for XPS 15 9550? Looks like XPS 13 9360 is using newer Thunderbolt NVM firmware version, though.

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Im having a problem when i connect my laptop with external display.
My laptop is HP tx2(12" display) with windows vista sp2 and my external display is an LCD tv of Onida(Xaria 22")

When i connect my laptop to the LCD tv, the connection is ok... display comes properly....resolution is also good...
but after some time of using it(either watching videos or even normal browsing) the display flickers and then gets diconnected(with the disconnection sound or tone) and automatically gets connected again.
sometimes after auto re-connection the resolution also gets changed....this is really annoying..

Iv used the help section... they asked me to increase the flicker rate to atleast 75 but my laptop has a max freq of 60hz only. iv also applied max resolution to the screen...but the same thing always happens again..
then i also connected the same lcd tv to my another laptop(hp dv6000, 15.4", vista sp2) and the same problem never comes. even the flicker rate of that laptop is max 60 hz. both have same resolutions also

iv tried all that i cud.... advise please.....

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I am on a laptop with a gtx 765m. I am trying to connect a thunderbolt port to a display port monitor. My understanding is that thunderbolt is backwards compatible with display port. But, for the life of me I can not get it to work.

I am using a minidisplay port -> display port cord.

I have ended up hooking the monitor up with an hdmi cord for now. FYI the monitor is a 2560x1440 monitor if that matters.


A:Thunderbolt to display port monitor. GTX 765m

Do you know for sure the video is ported through the Thunderbolt connector?

Any chance we could get your computer model number?

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When I switch between my home and work docking stations, the external monitor flickers.  I have tried what is recommended in this link:
But I don't have it plugged to the display port.  Both monitors are connected via DVI.  When I restart my computer there are no problems.  Only when I come out of sleep mode when changing docks.  The external monitors are different.  Both dells.    Video card driver is up to date.  Bios is up to date. The video card is Intel HD graphics 520 (driver  Display is Dell E2414H.  The dock is PR02X  F310C A03.  I have changed the monitor settings from auto detect to DVI input.   Also I disabled DDC/CI.  
I believe this is a video card driver issue although it could be bios related. 

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Hello Community-  I recently purchased a Lenovo X1 Carbon along with a Lenovo Thunderbolt 3 and two monitors. I have tested out the monitors individually with another computer, and they work fine.  Currently, I have one monitor connected via VGA to the Thunderbolt dock, and I have 1 monitor connected via HDMI to the Thunderbolt dock, which is connected to my Carbon x1. I only have connectivity with the VGA connected monitor, and do not have connectivity with the HDMI connected monitor, although I hear the system "connection sound" when I plug in the HDMI cord.  What is the issue here?  My goal is to have two monitors connected via Lenovo Thunderbolt 3 docking station to my X1 Carbon laptop. Thank you

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I have a P1 GEN2 OLED. While the internet is flooded with complaints of the OLED screen itself, the thunderbolt 3 port of my P1 GEN2 magically stopped working for no reason.  I have been using the laptop with an external display ever since I got the laptop. All went well. Suddenly from yesterday, the external display starts turning into a blue sreen with "NO SIGNAL" shown on it.  I had a windows cumulcative update (KB4532693) and windows security update (KB4524244) yesterday and I suspected that the update might be the culprit. I rolled back the OS. No change. Still NO SIGNAL.  I searched this Forum. Played with Thunderbold 3 menu in the Bios. Everything was enabled and every single option of "security level" was tried. Still NO SIGNAL.  I checked Intel Mangaement Engine software. It is already the latest version. Reinstalled it. Still NO SIGNAL.  I checked Nvidia driver. Latest version already.  In sum, the problem is: the thunderbolt port is still able to power the extenal display but just simply does not pass signal to the external display. HDMI port, however, still passes signal if use an HDMI cable.  I want to give it a shot here to see if anyone has experienced similar issues and how they sovled the problem before I call Lenovo technical support, the staff of which does not seem to know more than some people here on this Forum. 

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Whenever I run an external monitor (only) on the laptop's HDMI connector or a VGA adapter on the USB-C connector, the screen regularly goes black for a few seconds and the speaker beeps. Sometimes, not often, the resolution of the external screen will have changed when the monitor comes back from black.
I just updated the BIOS, chipset, and video drivers from the Dell download site.
The external monitor is an ASUS VW266H.

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Hi, I recently bought a 22" LG Flatron Monitor and a Toshiba Satellite Pro Laptop and have a flicker happening on the LG monitor whenever the laptop is plugged into an outlet. The flicker immediately goes away when the laptop is running off of battery power. The resolution is on the native 1920x1080 and refresh rate is 60Hz (can't change it). I have had this problem before with a HP laptop and BenQ monitor. The problem only happens to me at work (not at home), so I believe that is has to do with electrical noise on the circuit at this particular location. Anyone know of ways to get rid of or filter this noise to eliminate the flicker?

A:External Monitor Flicker when Laptop Plugged into Wall Outlet

What way do you use to change your refresh rate?

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(1) external monitor connected via Thunderbolt 3 Workstation Dock/Thunderbolt 3 Dock Gen 2 - Type 40AN. External monitor set as primary.All drivers/firmwares updated to the latest versions. Following the latest (Aug-Sep 2019) updates, the following problems appeared:BSODs every now and then, reported as related to dxgmms2.sys. Always while trying to start a movie on Netflix (external monitor).External monitor randomly goes blank (only rebooting gets it back on).Thunderbolt software window pops up on every boot. Boot time considerably longer than it used to be.Only once so far, could not boot (screen stuck on red Lenovo and "Hit Enter to interrupt..." message). Shut-down and restart fixed it. Any possible fixes on these?

P52, 8850H, P2000, W10pro 1903

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My just arrived XPS 15 9550 which I have updated to the currently newest drivers (BIOS, Chipset, Video, Audio) does not detect any external display via HDMI. It says no external display has been detected. My previous Dell notebook had no issues at all.
Any ideas what the problem might be and how to fix it?
Many thanks in advance!

A:XPS 15 9550 HDMI does not detect external monitor

I have the same issue.  New Dell, applied all updates.  No luck so far.

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My new XPS 15 9550 does not seem to support external monitors in [email protected] correctly.I have updated all of the drivers and BIOS to the very latest files available on the Dell support page, including the newest Thunderbolt 3 driver and firmware.I have managed to connect the laptop to the monitor ([email protected]) using a usb-c/tb3 to displayport adapter (kiwibird's). It works (and image is fine), however when the monitor goes to standby, it's almost impossible to wake it up again (I have to unplug the monitor, turn it off, turn it on again, and plug it again...).When the laptop is connected to the same monitor using hdmi ports (1.4), I am not experiencing any trouble (wake up does work), but I'm stuck at [email protected] (as expected).I have contacted Kiwibird support, they've told me the standby issue is a known issue related to the Dell's thunderbolt 3 driver when Dell XPS 15 (9550) is connected with 4K monitor. I have not found a confirmation so far (on the forums) that it's indeed a software issue, and I'm still wondering if the adapter is working correctly.Any thoughts ?Maybe another cable and/or adapter brand, either DP or HDMI, is working correctly ([email protected] and standby/wakeup works) ?Thankstranb3r

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Anybody know?
I bought a USB 3.1 Type C Male to HDMI Female Micro USB 1080P Adapter Cable but it didn't work - nothing on the display in my Dell U3415W monitor, nothing on my projector either (windows 10 doesn't detect an external monitor).  Anybody got any ideas?

A:How to connect xps 13 9550 to external monitor or projector with HDMI

Apparently no all USB 3.1 Typce C cable is compliant. There's a guy on Amazon who works for Google whose reviews you should find.

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hi, I have setup one of my faculty with a Yoga 920131KB plus Thunderbolt 3 Dock. He has an existing monitor (Samsung Syncmaster P2450) that should support 1920x1080. Seems to be current on all drivers and patches under Win10 EDU version. (Including the CCG4 Firmware Update to v55). We are using the HDMI output from the dock. If we try to configure extended desktop to the Samsung monitor at 1920x1080, the screen extends off both sides about half an inch. Maybe also a quarter inch over at the top.  As a work-around, set at 1680x1050, video generally works as expected, but the display starts about 2" in from either side. Generally I don't like using add-on utilities (prefer to just use standard windows built-in options), but somewhere along the line this has the Intel Graphics HD Utility.  I was using that to switch resolution, the Windows settings seemed to track along with changes in the Intel utility, but still overscanned the display.  I played with some other settings in the utility about Display Scale (other than 100%), didn't seem to change anything. A second problem occurs with this setup: when the laptop is used at home, put to sleep, then plugged into the dock, the screen is displayed on the external monitor at maybe 200% (?).  That is, you only see the central portion of the image.  No fiddling with settings seems to correct it, but rebooting usually fixes it. The second problem also occurs with a similar Yoga 920 + Dock (d... Read more

A:Yoga 920, Thunderbolt 3 Dock and external monitor

Also wanted to mention something I noticed while working on this: I saved a log from the Intel Utility. There is a section in there about "Maximum Image Size". This seemed to be correct for the laptop display (12.2"x6.69") but the Samsung was listed at 6.3" x 3.54"    It is a 24" diagonal display, so that is obviously wrong, but I don't know that it is important. Intel(R) UHD Graphics 620 Report Date: Monday, February 5, 2018Report Time [hh:mm:ss]: 1:21:19 PMDriver Version: System: Windows* 10 Education (10.0.16299)Physical Memory: 16225 MBVendor ID: 8086Device ID: 5917Device Revision: 07Graphics Output Protocol (GOP) Version: 9.0.1066Current Resolution: 1680 x 1050 Display Type: DigitalDDC2 Protocol: SupportedGamma: 2.2Connector Type: DisplayPortDevice Type: DisplayPortMaximum Image SizeHorizontal Size: 6.3 inchesVertical Size: 3.54 inches

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Hello Everyone, I am new here so please go easy on me.I just bought and X1 Carbon 5th Gen laptop c/w Thunderbolt 3.0 docking station.The problem that I have is that the docking station won't recognise any of the external screens that are connected.I am using two Acer screens (one is connected using HDMI port on the dock and the other one uisng Display port).I have tried by connecting just one screen but nothing.I can see that Thunderbolt software is installed and its connected to my laptop.The laptop will charge through the docking station and also the wireless mouse and keyboard will work fine through the dock.Lenovo recommended that i should update my drivers.So I installed Lenovo Companion from Windows store. But it won't update my system. After clicking on System Update, I will get an error message saying "There is a problem in reteriving new updates for your system.Please try again later".Hence I downloaded all the drivers from support website and installed them manually but my docking station is still not working with the external monitors.The monitors works fine when connected directly to the laptop using the HDMI cable. Thanks in advance for your help.

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Hi. My second external monitor (Lenovo ThinkVision LT2452pwC) connected with T570 via thunderbolt-dp cable (the first is connected via HDMI port). Once 2nd monitor stopped working and I had to push hidden button on the bottom of laptop. After that all started woking good. But today 2nd monitor stopped working agian and I tried all my past actions but it sill not working. Maybe it depended on Windows or thunderbolt drivers? (Cabel and monitor are OK I checked)

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My friend is having lots of issues with his moniter and screen flickers.

I'm fairly certain that the issue is the redraw rate but haven't been able to make any headway.

Sadly, it's next to impossible to change any relevent settings considerig how bad the problem is. I'm asking if anyone has a pinpoint solution so I'm not guessing while fighting the clock, since the problem seems progressive the longer the computer is running.

So sorry, I don't have any relevent information regarding the drivers or adapter seeing as... well, I can't see. I do know that the monitor is an 566LM made by LG, and is only about 3 years old since purchase.

Next step is getting another monitor over here to work with, but I was hoping that someone might tell me something that might save me a tiring trip up and down 3 flights of stairs with a big old monitor.

Any advice would be apprecated.

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I recently got a Dell XPS with Thunderbolt 3 technology for work, but also have a 2011 iMac with Thunderbolt.  I am wanting to use the iMac as an external monitor for the Dell, so I found a Thunderbolt 3 to Thunderbolt adapter to utilize TDM.  However, I have not had any luck making it work when pressing command-F2.  Through my research, I've found that using a pre-2011 iMac with a mini display port and a PC with a mini display port has worked no problem.  I've also found that using a post-2011 iMac as an external monitor with a PC should also work no problem if both computers have Thunderbolt technology.  In addition, I contacted Apple Support and they told me my connections should work since I have stepped the Dell's Thunderbolt 3 down to Thunderbolt, and connected the two machines via a Thunderbolt cable.  I am able to tell that my Dell recognizes the iMac, but have no way of knowing if the iMac recognizes the Dell.  Is there something that I'm missing?  Is there software that would make this work?  Has anyone had success getting this to work?  Any input would be greatly appreciated.  Thanks.    

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Hello, I have bought a USB-C Thunderbolt 3 to HDMI cable which i would like to connect to my X1 Extreme laptop.After i updated to the latest BIOS firmware, latest Thunderbolt firmware and Windows 10 (1809) and all other available updates, i still could not detect my LG 65C8 OLED TV which i have connected. It just does nothing when i insert the cable, not even a notification. For more information about the cable:https://shop.transmedia-germany.com/verbindungskabel-p-20013356.html Regards,Rob

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For my X1 Carbon 5th Gen I got myself a Thunderbolt 3 Dock (Gen 1) - (40AC). But right now the dock doesn't work as expected.I have connected a 1440p-Dell monitor via DisplayPort. Also I conntected a 1080p-Panasonic-TV via HDMI. The manual of the dock suggested to use a certain DisplayPort-Connector, which I did.I'd like to switch on my ThinkPad via the power button on the dock and then wake up my Dell monitor from sleep. Right now the Dell is set as primary display. If needed I'd like to switch on the TV as a secondary display. The ThinkPad should remain closed and only the external displays should be used. In the BIOS of the ThinkPad I alread configured, the an external display should be used prior to the internal one.Right now the following happens: I switch on the ThinkPad via the button on the dock. The Dell monitor doesn't wake up. Only when I switch on the TV (Panasonic 1080p via HDMI) also the Dell monitor wakes up and shows the content. I'm rather lost how to solve this behaviour. I already checked the BIOS version of my ThinkPad and updated it - nothing changed  Has anyone any idea?

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