Question

9

Horizontal colored lines appearing on display (Ubuntu 22.04)

rated 0 times [ 9] [ 0] / answers: 1 / hits: 1209 / 1 Year ago, wed, april 26, 2023, 5:00:42

While working with my DELL XPS 13 laptop (shipped with Ubuntu), sometimes colored horizontal lines appear (I cannot recreate the beahvior, it seems random). I tried attaching an external monitor to see if the behavior pesists on the other monitor: nevertheless, it seems these lines don't appear anymore even on my laptop when an external monitor is attached.

Any hint?
See photo.

EDIT: my info
PC model: Dell XPS 13 9320
OS: Ubuntu 22.04
Processor: 12th Gen Intel Core i7 1260Px16
RAM: 32 GB
Graphic: MESA Intel Graphics (ADL GT2)

EDIT: don't put attention on the info you see in the photo: they concern another post I was looking at, not my computer. I could take the photo in that moment as the issue suddenly appeared.

EDIT: I formatted the laptop downgrading to Ubuntu 20 and it worked fine for one day, until updating it. Then, the problem came back. Lowering the resolution helps a bit but does not solve the issue. All built-in DELL diagnostic tests give no problems.

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dersol

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answered 1 Year ago onbean · Accepted Answer

Update: I managed to get my ticket escalated with Dell technical support and the next tier has been quite helpful. They say Dell engineering has opened a ticket with Canonical and they are working on a fix. In the meantime, they suggested adding the parameter i915.enable_psr=0 to the GRUB_CMDLINE_LINUX_DEFAULT string in /etc/default/grub, so (at least on my machine), the relevant line becomes

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"

I made this change, ran sudo update-grub, rebooted into the 5.19 kernel, and I don't have the video artifacts anymore.