Ubuntu
xserver-xorg-video-ati package

  1. Bug #416001
  2. Comment #13

Comment 13 for bug 416001

Revision history for this message
Grant Bowman (grantbow) wrote :

After living with this problem for a long time and a few hours of playing around I found a fix. I created an xorg.conf file and added one line to the Device section changing to EXA instead of XAA, leaving all defaults the same. Here's the important part:

Section "Device"
        Option "AccelMethod" "EXA"
        [...]
EndSection

Why does this work? For some cards like some models of Mobility Radeon the developers decided to change the default from EXA to XAA for performance reasons. Most other ATI cards default to EXA, but some default to XAA. Even if you think you know what it should default to, double check it. Changing the AccelMethod fixed my problems.