(In reply to Filipp Andjelo from comment #3)
> Almost the same problem here, full system crash, but I can't even reach the
> main menu. System is completely dead on the first rendering frame of the
> scene you see in the main menu.

Almost, but not quite the same problem then. Please file your own report.

Paulo, please attach the full /var/log/Xorg.0.log and the output of dmesg
showing the radeon driver initialization.

(In reply to Paulo Dias from comment #2)
> how can i do that? the kernel freezes and not even sysrq keys work anymore,
> i need to power off the pc.

Since you were able to retrieve the GPU fault messages from the kernel, you
might be able to retrieve a working apitrace as well.