[solved] Problem - Had kernel 5.19.12 on i915 GPU latop

Message

DeIM · Post by **DeIM** » Wed Oct 26, 2022 6:59 am

I had some time kernel 5.19.12 on laptop with intel GPU.
It was OK and another day without changes it made problems with displays.
I then moved to kernel 6.x.x but I don't know if current problems are caused by problematic kernel or not.
I use external TV as monitor and I tried fheroes2 and vcmi and both after some time causes monitor goes full red color.
I can only go to console Ctrl+Alt+Fx - laptop display displays console correctly but to get external monitor working needs restart.
Could this be because of usage of problematic kernel? Could this be permanent?
Thanks

DeIM · Post by **DeIM** » Wed Oct 26, 2022 7:15 am

I'll try problematic apps on laptop's display - it could determine if it's only external monitor problem or not.

DeIM · Post by **DeIM** » Sun Oct 30, 2022 10:59 am

OK seem only output to external monitor is problematic dmesg:

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[  185.278399] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
[  185.278433] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun
[  557.787032] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
[  564.131852] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
[  575.074673] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[  692.381647] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
[  692.381669] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun
[  918.170754] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
[  934.788456] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

DeIM · Post by **DeIM** » Sun Oct 30, 2022 11:02 am

will try:
https://wiki.archlinux.org/title/Intel_ ... flickering

DeIM · Post by **DeIM** » Sun Oct 30, 2022 7:16 pm

ok seem solved - added to kernel command line:

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i915.enable_psr=0 intel_idle.max_cstate=2