Created attachment 144891 [details]
Since 5.2 kernel, my system (raven ridge 2400G, Asrock X470 Gaming-ITX/ac, latest bios, archlinux) crashes (black screen or green screen or flickereing screen at start). I identified the issue with my RAM's speed, which is shared between the GPU and CPU.
Everything above 2133Mhz crashes.
I dont have this issue with 5.1 kernel.
Dsmeg of the crash as attachment
Can you bisect?
(In reply to Alex Deucher from comment #1)
> Can you bisect?
I'm gonna try ^^, never did it before and leave to holydays Friday.
I'm gonna start with RC, then whith commits.
You think it's a proper way ?
Ok, back from holidays.
Just compiled 5.12 RC1 and it doesnt work, green screen.
Any idea which commit i should test ?
I have finished bisecting.
This is the commit which created the bug :
" Bissection : 0 révision à tester après ceci (à peu près 0 étape)
[005440066f929ba0dca8f4e0aebfbf8daac592cc] drm/amdgpu: enable gfxoff again on raven series (v2)"
What do i do next ?
Seems to be related to this bug:
Tried amd.iommu off but doesnt work, so it's something else.
Created attachment 145321 [details]
Tried this "amdgpu.ppfeaturemask=0xffff3fff" but iit doesnt work (from here: https://bugzilla.kernel.org/show_bug.cgi?id=204689).
Add new dmesg to check firmware version
And cant revert the commit with 5.3, i get git conflict...
I noticed IOMMU page fault in the log - is disabling iommu helps ? (from grub cmdline add iommu=off)
Tried with "iommu=offiommu=off amdgpu.ppfeaturemask=0xffff3fff", no change, green screen.