Comment 64 for bug 419328

--Can someone please confirm that disabling compiz (or mutter, or anything other than metacity) makes the --problem go away?

For me it works better without compiz, but...
Activating the external screen with my self-configured hotkey does not work the first time after reboot (false resolution or black screen with movable mouse), i have to press it twice, but after that i can connect / disconnect my external screen, change resolution etc. without any problems.

Having desktop effects enabled is similar: depending on the external screen that I connect(!) the system crashes or is just not working after the first try, but can be activated with the second try and after that it is also working flawlessly...