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[Bug 745839] Re: compiz crashed with SIGSEGV in pthread_mutex_lock()


No, not really a driver issue.  Rather, you're pushing the hardware
beyond its capabilities.

The X300 radeon card in the Xpress 200M is capable only of a maximum
2048x2048 combined screen dimension when running compiz.  See bug

Arrange your screens top/bottom instead of left/right and you should be
fine (it'll fit inside the 2048x2048 limit.)  Also, remove the virtual
resolution specification in your xorg.conf - shouldn't be needed

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  compiz crashed with SIGSEGV in pthread_mutex_lock()