Comment 0 for bug 893222

(paste from another bug on this issue)
Title: Video is not displayed on external display correctly

Summary: Lost desktop control after conecting system to external display. When first connected to the external display, onboard display disappears and only mouse pointer is seen, and red screen on the external monitor. Pressing Fn + F8 to switch different video out modes doesn't get the desktop back. It's either mouse pointer on the external display or on the onboard display. I have to hard power off the system to restore.

Steps:
1. Install Ubuntu 11.10
2. Connect the system to an external display via VGA or HDMI
3. Press Fn + F8 to switch between different video out mode

Expected results:
First Fn+F8, video signal is mirrored
Second Fn+F8, video signal is extended
Third Fn+F8, video signal is displayed on external monitor only
Fourth Fn+F8, video signal is returned to onboard display

Actual results:
First Fn+F8, onboard desktop disappeared and only mouse pointer is shown.
Second Fn+F8, red screen is shown on external monitor
Third Fn+F8, only mouse pointer is shown on external monitor
Fourh Fn+F8, only mouse pointer is shown on onboard display