Comment 32 for bug 745608

Ferry:
It's really hard to tell and there's a risk that a lot of issues that might be need to be separate are lumped together.

I've seen different types of corruption on my EeePC 900 with an 915GM since 10.10:
Horizontal line(s) through a glyph. Affects the same character of that font/size repeatedly, problem persists past a repaint. Screenshot: https://bugs.freedesktop.org/attachment.cgi?id=45730
A rectangular/square "block" of the glyph is missing. Affects the same character of that font/size repeatedly, problem persists past a repaint. Probably the same as the above but might be different. Tends to be rarer than the first type of corruption.

The 945GM I have never shows the above problems (although it shows another issue - https://bugzilla.redhat.com/attachment.cgi?id=493733 ). I've also yet to see any font corruption on a machine with a 965G graphics chipset...

All the corruption above happens without needing to suspend/hibernate and resume.

We need to be clear on what types of corruption happen, where they happen, what triggers the corruption and which graphics card chipset is being used. Another thing to check is whether turning off tiling by putting

Section "Device"
    Identifier "Intel"
    Driver "intel"
    Option "Tiling" "false"
EndSection

in /etc/X11/xorg.conf and then rebooting changes whether the corruption appears (the above is purely for testing purposes though - don't run daily with such a configuration as it will be very slow!).