Comment # 13 on bug 1222156 from Roberto Canella

(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.

Hi Stefan,
given the security problem that arose with xz, I preferred not to do the
"snapper rollback" and update the system... so I did as you suggested and put
the radeon on the blacklist. Now everything works correctly even if not at its
best, however I prefer it this way and not have possible security problems.

Thank you