https://bugs.freedesktop.org/show_bug.cgi?id=45018
--- Comment #31 from Harald Judt h.judt@gmx.at 2012-03-02 07:10:27 PST --- Using current git of kernel, xorg-server, xf86-video-ati and mesa, the screen still freezes every once in a while and dmesg shows these messages:
radeon 0000:01:00.0: offset 0x200000 is in reserved area 0x800000 radeon 0000:01:00.0: offset 0x200000 is in reserved area 0x800000