Comment # 16 on bug 1208938 from Danil S

I think I found what not working, and I think it connected to this amd_iommu
feature and this bugreport:

Un-Suspend to RAM not working when AMD GPU used as main GPU, it was working
before 6.2 kernel, I used it alot.

on 6.2.4 kernel:
Suspend works, system power off and does un-suspend but freezes and display
just static frame on screen, no keyboard mouse working, numlock also not
working.
I tried to press "power button" and wait to see if system react and in log
bottom at end it visible, so it look like system freeze on "using" amd-gpu I
think.

Suspend with Un-Suspend works in kernel 6.2.4 only when main GPU is Nvidia, not
amd.


only lines related to amd in log:

```
13:11:22 home-danil kernel: amdgpu 0000:07:00.0: [drm] *ERROR* flip_done timed
out
13:11:22 home-danil kernel: amdgpu 0000:07:00.0: [drm] *ERROR* [CRTC:67:crtc-0]
commit wait timed out
13:11:12 home-danil kernel: amdgpu 0000:07:00.0: [drm] *ERROR* [CRTC:67:crtc-0]
flip_done timed out
```

Log from - I pressed "suspend" system turned off, I pressed un-suspend
log after I pressed un-suspend so system restart
https://paste.opensuse.org/pastes/57f648c0e816