I have resolve my problem of OpenGL corruption adding
Option "AccelMethod" "EXA"
vi /etc/X11/xorg.conf
Section "Device" Identifier "Configured Video Device" + Option "AccelMethod" "EXA" EndSection
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/269357/comments/2
I have resolve my problem of OpenGL corruption adding
Option "AccelMethod" "EXA"
vi /etc/X11/xorg.conf
Section "Device"
Identifier "Configured Video Device"
+ Option "AccelMethod" "EXA"
EndSection
https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- ati/+bug/ 269357/ comments/ 2