Comment # 91 on bug 35457 from Programmist11180

Symptoms same as on screenshots in attachments.

I found out that graphics corruption appears with this /etc/X11/xorg.conf

Section "Device"
    Identifier "Radeon"
    Driver "radeon"
    Option "EXAPixmaps" "off"
EndSection

When "EXAPixmaps" is "on", no graphic corruption.
It is fair for ALL kernels that I tested (3.2 , 3.12 , 3.13rc6).
Appears only in applications that used opengl (glxgears for example).