This bug is related to the intel graphics driver, which is used by compiz. However is not a compiz as I managed to crash xorg in a XFCE session as well while watching a movie with VLC.
Disabling compiz windows animations helps as workaround for this bug while opening new windows/menus, but does not fix the bug itself as any other app using accelerated graphics can make xorg to crash.
This bug is related to the intel graphics driver, which is used by compiz. However is not a compiz as I managed to crash xorg in a XFCE session as well while watching a movie with VLC.
Disabling compiz windows animations helps as workaround for this bug while opening new windows/menus, but does not fix the bug itself as any other app using accelerated graphics can make xorg to crash.