WX5100 Causing System Hangs

[amock]

I've recently started having problems with my Talos II and WX5100.  Sometimes when I left my system on overnight and tried to turn the screen on in the morning it wouldn't turn on.  It started happening more and more frequently and it seemed to be tied to the card being put into a low power state, so I tried disabling DPMS.  That seemed to work for a little while but now it's back to hanging regularly.  I've attached the console output from  one of the hangs.  When it does hang things still work sometimes except that restarting hangs when it tries kill X and sometimes other processes like Thunderbird or Firefox.

Has anyone else seen this or does anyone have any idea of what the problem might be?  I'm currently running Ubuntu 20.10 with 5.8.0-26-generic and I was originally running Fedora, but I don't remember which kernel versions I tried.

[MPC7500]

There are a lot of reports on the AMD Github repo related to this bug.

[amock]

Thanks for the link.  That makes me hopeful that a fix might be available at some point.

[tle]

Best is to stay with kernel 5.6 and 5.7. I don't think the AMD core team care too much about supporting old cards. I could see bug reports related to 5500 or 5700 card would get attention whilst other are litterally collecting dust.

[amock]

I enabled xscreensaver and have it set to never blank the screen so that my GPU is constantly doing something and that seems to prevent the crashes.  It's not a great solution but hopefully it will continue to work until there's something better.

[shawnanastasio]

In case you haven't seen it yet, this issue (https://gitlab.freedesktop.org/drm/amd/-/issues/1171) mentions the kernel parameter amdgpu.runpm=0 as a workaround.

[amock]

Thanks for the link.  That seems like it would do the same thing as running the screensaver all the time so I'll give it a try the next time I reboot.