I just want to add that I started using Unity2D on 12.04 as a result of these crashes with this GPU lockup CP stall issue, and have had zero issues or crashes since doing so (if that helps anyone work around this in the meantime.)
On a strange note, I have not noticed this issue on a fresh Debian Testing KDE install on the same computer...I would think it would be using the same open Radeon driver (similar-ish kernel), but perhaps there is some difference I am unaware of. Sorry if this is meaningless / anecdotal.
I just want to add that I started using Unity2D on 12.04 as a result of these crashes with this GPU lockup CP stall issue, and have had zero issues or crashes since doing so (if that helps anyone work around this in the meantime.)
On a strange note, I have not noticed this issue on a fresh Debian Testing KDE install on the same computer...I would think it would be using the same open Radeon driver (similar-ish kernel), but perhaps there is some difference I am unaware of. Sorry if this is meaningless / anecdotal.