plivy
1 Copper

Re: External monitors for XPS 9350

There is no solution to this issue. Trust me. If you connect one 4k monitor @60hz to an XPS13, you cannot connect a second monitor (or use the built-in display) without experiencing periodic blank screens that last a few seconds. I've tried with both the Cable Matters USB-C to DisplayPort 1.2 cable, and with a TB16 dock. I have an LG 27UD69P.

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GoMrPickles
2 Bronze

Re: External monitors for XPS 9350

Well, I disagree to an extent; it works like a charm in Ubuntu. It's a Windows problem, not a hardware problem.I have an LG 27UD69P too and I'm using the built-in display and the external monitor right now, no flickering whatsoever. 🙂

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Re: External monitors for XPS 9350

I have same issue. (xps 9350 with Dell U2718Q). Moved from ubuntu to windows (10 pro). The latest bios and drivers. I think it started after 1803 update, but i'm not sure.

I found that when I lower the refresh rate of the build-in display to 48 Hz, its get much better, but the flickering is still there. When I turn the built-in display off, the flickering on external display stops.

Doesn't matter if using usb-c to displayport cable, or docking station (itec thunderbolt 3 dock)

I was trying to get it fixed by dell support, they replaced my motherboard, but it didn't help. They blamed microsoft and didn't offer any other solution.

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Moderator
Moderator

Re: External monitors for XPS 9350

Hi,

 

Thanks for posting here. I will be glad to look into this and assist you.

 

Could you capture a video of the issue (with the change in refresh rate) and share it via private message so we can have this reviewed with our teams and also share the current version of BIOS, Video driver, registered name and system Service Tag.

 

To send a private message, please click on the message tab next to your avatar– click “New Message” & search for my Dell username (DCFAdmin) & send a private message with the details requested.

 

-Farooq

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GoMrPickles
2 Bronze

Re: External monitors for XPS 9350

Nearly a year later... I still have this issue. I sent a video to the @DELL-Cares address.

4k @ 60Hz still works fine in Ubuntu; it does not work in Windows 10.

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Highlighted
GoMrPickles
2 Bronze

Re: External monitors for XPS 9350

Let's try that again: the user who offered to help me does not have an account any more, so... back to Ubuntu I go!

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