https://bugzilla.kernel.org/show_bug.cgi?id=107381
Tabs tabsc@hotmail.fr changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |tabsc@hotmail.fr
--- Comment #18 from Tabs tabsc@hotmail.fr --- It is possible to disable VCI in the latest drivers (commit was done on Mar 18, 2016).
For persistent changes edit file /etc/modprobe.d/radeon.conf to add the line: options radeon vce=0
After the next reboot you can check the changes apply by using systool -vm radeon
It stops the error messages for me, but I have the feeling that the UI is much slower (probably 2D accelaration has been disabled in the process).