https://bugs.freedesktop.org/show_bug.cgi?id=86320

--- Comment #3 from Stefan Brüns stefan.bruens@rwth-aachen.de --- Please attach the whole dmesg output/Xorg log, as requested. Otherwise it is really difficult to get the whole picture.

Currently, there is no information provided by you indicating kernel version, XOrg server version, radeon xorg driver version, distribution. All this would be available when you provided the full logs.