Comment 65 for bug 419328

reply to comment #62:

Here is what I did:
- booted up with VGA cable disconnected from laptop
- logged in as ordinary user
- turned off visual effects in preferences
- killed compiz-decorator process (not sure this step is necessary)
- connected the VGA cable
- ran xrandr --auto: this went OK (no crash)
- ran display prefs to use dual-head mode; this went fine.
- removed the VGA cable
- logged off then on again
- turned on visual effects
- connected the cable
- ran display preferences and X crashed (black screens, external screen is on, it is showing an immobile mouse pointer in the left middle). No response whatsoever to keyboard, mouse or touchpad. I Had to powercycle the machine.

Note: I can use compiz in dual head mode, I just need to connect the VGA cable prior to the start of the X server.