AMDGPU bug

[Kazlauskas, Nicholas]

On 2019-11-10 7:00 p.m., Subsentient wrote:
> Hi, I've been experiencing a bug on kernels 5.2 and up that apparently 
> is uncommon and/or unimportant enough to have both threads mentioning it 
> die.
> 
> On a Ryzen 3 2200G, the amdgpu driver fails upon lightdm login:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1752188
> 
> I thought I'd bring this to your attention as the others reporting this 
> bug have so far been met with silence, and this has trapped me and 
> others on the unsupported kernel 5.1.21.
> 
> Thanks for your time.
> 
> 
> 
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> 

I'm not sure that the backtrace listed is particularly relevant for 
describing what issue is actually occurring, but if I had to take a 
guess based on the ASIC and kernel version I would imagine that it's 
Raven's displayable DCC support that's causing you issues.

I believe you'd need to be running mesa, xf86-video-amdgpu and running 
without a compositor in your desktop manager. Does this describe your setup?

If you can bisect that would help narrow things down further. The bisect 
commit would likely be one that's just changing the amdgpu version 
number if it's DCC (since mesa checks that before deciding to enable 
displayable DCC).

Nicholas Kazlauskas