I have now tested for a few days with an X11 session. 
Unfortunately the bug still occurs. 

It occurs a bit more rarely and after the screen starts to flicker I
have more time to react (save open work) before the system exhibits
further instability. Also the hangs where everything graphical occurs at
~1fps have not yet been observed, instead a crash of the GUI happens.

I will attach a journalctl log excerpt starting from a resume after
which the error occurred. amdgpu errors are reported starting from Line
233.

Under https://roel.re/tmp/del2026/Bug2103854_Ideapad_amdgpu.webm I
uploaded a very short video which shows the initial corruption showing
in one of the 3 buffers. In this case only a few pixels, sometimes also
the whole screen flickers. Shortly after such artifacts show (and rarely
also without such a warning) the system will hang or crash. Restarting
the GUI does not mitigate the issue, a full reboot is needed.

@You-Sheng Yang (vicamo) I did not test the kernel from the PPA as, as
you noted yourself, the kernel in my system already has the patch. Also
the ppa was made for oracular while I am testing/running plucky. But
thank you for taking the time to compile it. If you want me to test with
the kernel anyway I can do so.

** Attachment added: "Journalctl log X11 from resume to X11 crash."
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2103854/+attachment/5867169/+files/journalctl_excerpt_2025-03-24.txt

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https://bugs.launchpad.net/bugs/2103854

Title:
  [IdeaPad Pro 5 14APH8, Radeon 780M] amdgpu causes hangups and crashes

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