Peter, I don't think it's a fix, but only a workaround that limits two
important power management functionalities (cpu cstates and gpu display
cstates). I hope and believe they're still working on finding a real fix
for the bug.
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In file /etc/default/grub I added to parameter GRUB_CMDLINE_LINUX_DEFAULT:
i915.enable_dc=0
intel_idle.max_cstate=2
updated grub and now I'm flicker free for a few days.
The last kernel without the flickering for me was the kernel that
shipped with 21.10
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After a flickering occurs the following message appears on the Log:
i915 :00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
kernel device: +pci::00:02.0
priority: 3
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Bugs, which is subscribed to Ubuntu.
Yes, I did.
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https://bugs.launchpad.net/bugs/1970426
Title:
[i915] screen suddenly starts flickering after update
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I can confirm that neither of the following fixed the bug:
GRUB Param `i915.enable_psr=0` did not fix
`intel_idle.max_cstate=4` did not fix
`intel_idle.max_cstate=0`did not fix
x11 session did not fix
Also, I noticed that when the screen starts flickering it only stops if
I move the cursor, if I
Public bug reported:
After I updated to 22.04 sometimes (about 3 ~ 4 times a day) the screen
starts glitching and flickering like in the attached video and it
doesn't stop until I move the cursor.
Description:Ubuntu 22.04 LTS
Release:22.04
wayland
processor: Intel® Core™ i5-8265U
It also affects me.
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https://bugs.launchpad.net/bugs/1942616
Title:
Settings Power says high hardware temperature
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