Bug#987388: Crash of amdgpu on Debian 11 Bullseye
Dear all on this bug,
I would like to briefly point out these crashes are showing kernel
errors, the kernel / amdgpu modesetting seems to be a very significant
part of the problem if I am not mistaken, this bug being against
the X-server component.
I would say, from the deb-10 / MX19.4 side of things with a GCN1.1
series amdgpu card, updated 5.10 kernels (i.e. backports of deb11
bullseye kernels) have incrementally improved problems with crashing,
resuming from sleep, and so-on. With 5.10.0-7 I seem to be able to
reliably unpower and repower monitors and manage to keep X working
without crash and just xrandr fix up monitor layout. Similar applies
to sleep/resume situation!.
I know the kernel amdgpu modesetting driver is a huge part of that work.
In short, I would highly recommend trying different kernels on your
deb11 testing machines and see how that affects your situation, and
in any case report which kernels are in use in the crash scenario.
Debian11 bullseye currently has 5.10.0-6 and I understand the 5.10.0-7
packages are to hit bullseye soon (through hard freeze).
5.10.0-7 is in sid and can be manually downloaded, or installed via
*temporary* adding sid to sources.list and then removing from sources
(or pinning to avoid all packages going to sid).
https://packages.debian.org/search?keywords=linux-image-5.10.0-7-amd64
Also, I would note, testing the older linux-image-4.19.0-16 may be
worthwhile, I get impression this (buster) kernel should nonetheless
'work' with bullseye and may assist with the 'it used to work' scenario.
Hope that helps,
--Simon
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