Comment 7 for bug 288620

I think this might also be the cause of "#290704: [Intrepid] Computer freeze when switching user" (duplicate of bug #266911).

I observe this message in my kern.log when ever I have compiz enabled (and therefore the proprietary ATI driver) on my thinkpad T400 (with discrete graphics enabled).

01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Mobility Radeon HD 3400 Series [1002:95c4]

The output of full lspci is attached: