Okay thanks for checking. On to the next suggestion...
Based on the description of the symptoms, it sort of sounds like this
might be caused by an incorrect AGPMode setting, which is relevant when
DRI is enabled. You should test if changing this makes the issue go
away. In your /etc/X11/xorg.conf set AGPMode to various values like
this:
Section "Device"
...
Option "AGPMode" "2"
EndSection
Possible values include 1, 2, 4, 8. You can see what it's currently set
to by looking in /var/log/Xorg.0.log. It's worthwhile to test all four
values even once you find one that works. If this takes care of it for
you, we may be able to establish a quirk to set it for your hardware
combo
For more details on this, please see the "ATI AGP Mode Quirk" section at
https://wiki.ubuntu.com/X/Quirks
** Changed in: xserver-xorg-video-ati (Ubuntu)
Status: Triaged => Incomplete
--
[Mobility 9200] [AGP] Screen corruption on resume from suspend, Sony Vaio
https://bugs.launchpad.net/bugs/240455
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