Hi, i posted this in another thread but i think this one maybe more appropriate so i'll just copy this:
Hi, I experienced this lockups too and i've tried every solution i found on this forum but none of them solve the problem. I read that this can be 2.6.24 kernel problem so finally i compile 2.6.25 and for a day or so everything seemed to work fine. Eventually I wanted to run compiz therefore I had to install fglrx. I installed the latest version from ati, run compiz --replace and a few seconds after my system froze on 2.6.25 kernel! To confirm that it's not kernel issue I installed some older gutsy kernel (2.6.22) and after some time it also froze :/. When i was using this kernel on gutsy it never locked up so here's what i think - It's not kernel issue and not compiz couse my system freezes when compiz is off too. It seems that proprietary driver for readeons is the problem becouse my freezes started after i installed it. Compiz and things like that could be kind of a trigger for real issue.
So why freezes happens to nvidia users too? ATI/Nvidia released buggy drivers simultanously? I don't think so :/
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