Comment # 17 on bug 1233134 from Takashi Iwai

I tried my test machine with AMD GPU and could see some related issue.

Mine had no external display connected, and although the desktop appeared on
the laptop display, the Linux console is gone.  I see the same, the
disappearance of console in your log, too.

So I tracked further down the breakage and spotted out that it's the patch
  patches.suse/drm-amd-display-Check-null-pointers-before-using-the.patch
for CVE-2024-49922 bsc#1232374

It's not clear exactly what happens there, but the addition of the first hunk
there (the NULL check of dm_state) leads to the problem (at least on my
system).
And, this problem seems specific to SLE15-SP5; SLE15-SP6 and later are fine
with the backport.

That said, this looks like a generic AMDGPU regression on SLE15-SP5 kernel.

I'm building two test SP5 test kernels in OBS home:tiwai:bsc1233134 and
home:tiwai:bsc1233134-revert repos.  The former is with the patch correction,
and the latter is the drop of the whole patch.

  https://download.opensuse.org/repositories/home:/tiwai:/bsc1233134/pool/
 
https://download.opensuse.org/repositories/home:/tiwai:/bsc1233134-revert/pool/

Please give them a try later.  If your bug is as same as mine, both of them
should work.