I just did a full update of my karmic installation on my Thinkpad T41.
Turning on compiz *still* causes screen corruption, with full system
lockup soon after. I also just tried booting from the karmic release
candidate live cd (off of USB), which still defaults to having compiz
turned on. Again, I get screen corruption, followed by a full system
lockup soon after. This is embarrassing. We're 7 days aways from the
final release, and this is still happening.

Compiz needs to default to off until this is fixed. Affected systems are
probably any with the low-end Radeon RV250 chipset (== Mobility 9000) or
less. It would probably be safest to include systems with Mobility 9200
chipsets as well. This needs to happen now!

There's no need for compiz on these systems anyway - graphics are
wonderfully fast with it turned off - finally on the order of Windows XP
fast. We can turn an absolutely critical bug into a great enhancement
for these older laptops. What does it take to get this done?

** Changed in: xserver-xorg-video-ati (Ubuntu)
     Assignee: (unassigned) => Bryce Harrington (bryceharrington)

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[RV250] thinkpad t40 with ati radeon rv 250 (M 9000) freezes
https://bugs.launchpad.net/bugs/374780
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