Ubuntu
linux package

  1. Bug #1975566
  2. Comment #23

Comment 23 for bug 1975566

Revision history for this message
Sebastian Schauenburg (sschauenburg) wrote : Re: Unknown bug

Re-reading my previous post, I need to clarify.

about 1) and 2):
I tried to USB boot (normal) and it didn't work. I got many GUI hangs/crashes. After ~5-10 times I got fed up with it and tried a USB (safe) boot, which worked. Then I tried the USB (normal) boot again and it suddenly worked.

about 3):
if the GUI works, it hangs quickly but never in the same interval (probably crashes in the background) and does not recover. I seem to remember that sometimes even switching to a VT didn't work. I was surprised that remote SSH login worked, but reboots had to mostly be 'hard' eventually (e.g. the reboot command didn't completely finish).
When the GUI hangs, the mousecursor is static and nothing can be done. Alt-tabbing also did not work.

But, I found a workaround!
I installed the "5.18.0-051800-generic" kernel from https://wiki.ubuntu.com/Kernel/MainlineBuilds
and used this modprobe file with options:
# disable the older 'radeon' kernel module
blacklist radeon
# disable audio
options amdgpu audio=0
# magic options for my TAHITI R9 280X
options amdgpu si_support=1
options amdgpu cik_support=1
options amdgpu dpm=0
options amdgpu aspm=0
options amdgpu runpm=0
options amdgpu bapm=0