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I've been using 20.04 and I updated to 22.04. After a few days a black flickering appears randomly, it's very annoying and it didn't happen before. Any idea what might be the cause?

pcc
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  • Why can't you wait to August to upgrade to the stable version when it is released? – Jonte YH Apr 30 '22 at 07:59
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    Unfortunately, I have the exact same issue. I attempted to enable and dissable Wayland in `/etc/gdm3/custom.conf` but that made no difference. – Dan Apr 28 '22 at 16:05
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    I have the same problem, and I'm glad that it seems not to be a hardware issue, as you're also experiencing after 22.04 update. – André Carvalho May 01 '22 at 00:35
  • same here on dell laptop latitude with intel HD integrated GPU. This flickering display stops when I move my mouse and come back sometimes on certain mouse position then disapear again on mouse move. – utopman May 05 '22 at 15:36
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    hey guys, same problem here. See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970426. There are some possible config solutions posted there, and hopefully an official fix is gonna be released soon! – dimisjim May 06 '22 at 06:07

1 Answers1

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A fix would be to add the following parameters to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub:

i915.enable_dc=0
intel_idle.max_cstate=2

then update GRUB using:

sudo update-grub

You should be flicker-free now!

Source: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970426/comments/24

BeastOfCaerbannog
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dimisjim
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  • Thank you, tried this! And thank you for the source, I'll also be checking there whether they have any information on this bug – pcc May 07 '22 at 01:40
  • Is it fixed now? – Scientist Jun 23 '22 at 04:54
  • @Scientist bug is still unresolved on the launchpad link provided above – dimisjim Jun 23 '22 at 08:11
  • Because I was struggling in which format I should add this parameter: It comes in one line separated by a space and in "" so : "i915.enable_dc=0 intel_idle.max_cstate=2" – Leon D Oct 22 '22 at 16:38
  • I'm on 22.04 and the proposed solution didn't work for me. Following the ticket, I tried another solution -- appeanding `i915.enable_psr=0` instead. I've been restarted for about 30 mins and it seems like it has worked. I found that solution here: https://github.com/ljvmiranda921/comments.ljvmiranda921.github.io/issues/41#issuecomment-1304393287 – fearphage Jan 25 '23 at 00:53