Could you please run (in a terminal): $ python -c 'import gtk.gdk; print gtk.gdk.display_get_default().get_default_screen().is_composited()'
and attach the output here? Right before (or after) the crash happend?
Could you please run (in a terminal): display_ get_default( ).get_default_ screen( ).is_composited ()'
$ python -c 'import gtk.gdk; print gtk.gdk.
and attach the output here? Right before (or after) the crash happend?