Comment # 3 on bug 1233134 from Heiko Rommel

(In reply to Takashi Iwai from comment #2)
> Is it a complete kernel hang-up, or is it just a graphics problem?  i.e. you
> can't access remotely via ssh?
> 

It is a complete hang-up. Can't access it remotely or switch consoles. Only
Sysrq still work.

> Also, please check with the latest SLE15-SP5 kernel in OBS Kernel:SLE15-SP5
> repo
>   https://download.opensuse.org/repositories/Kernel:/SLE15-SP5/pool/
> 
> If the problem persists, we'd need to get the crash log.  e.g. you can
> disable the drm kernel modules in initrd via dracut option, also
> blacklisting amdgpu.
> Then after the system boots up, load amdgpu module manually and get the
> kernel messages.  At best, try to set up kdump and get the full dmesg output.

Will do.