Comment 8 for bug 438000

That's a question I am also asking myself. The descriptions are a bit different, but, when doing more test on this bug yesterday with compiz enabled, it happened once that, after going to dual screen mode, the screen went black with only the white mouse pointer displayed and moving (this happened only once, the other times I had the frozen screen with garbage on display as usual). In bug #383345, the initial report says that the mouse pointer is moving on display after the freeze.

Something I shall add : I have no /etc/X11/xorg.conf file (probably because I have a fresh install of karmic), so I can't give any detail about the "virtual resolution".

My guess is that the underlying bug is the same as #383345, but we can't be 100% sure.