Comment # 26 on bug 1222156 from t neo

(In reply to Stefan Dirsch from comment #10)
> Togan switches with his option to the newer amdgpu Kernel driver (which
> isn't default for his Radeon GPU). I doubt this changes also the Mesa
> driver. But seems this prevents the segfault.
> 
> @Robert I think you have a different Radeon GPU, so you can't easily switch
> to amdgpu driver or the support for it isn't working (there is a reason that
> default kernel driver is radeon and not amdgpu). So this doesn't help.
> 
> I suggest to either do a rollback or disable radeon kernel driver completely
> with
> adding 
> 
>   modprobe.blacklist=radeon
> 
> to GRUB_CMDLINE_LINUX_DEFAULT (see comment#7). With that you'll get simpledrm
> on top of generic framebuffer. Means no 2d/3d acceleration and no
> multimonitor support, but you should have a stable desktop back.

Adding modprobe.blacklist to the GRUB command makes my machine bootable in
graphical target again. 

@Takashi the issues arose with the last complete rebuild image from Tumbleweed
(VERSION="20270329"), due to XZ backdoor. It effects kernel 6.8.1-1-default.
The last known kernel that I have to test with and works is 6.7.8.x