Ubuntu :: Moving Mouse During Blank Screen Does Not Return To Gnome Desktop

May 21, 2011

An ubuntu-11.04 laptop is set to turn on the screensaver after 5 minutes of inactivity, and power management is set to blank the display after 15 minutes of inactivity. When the screen goes blank, you're supposed to be able to move the mouse to return to your Gnome desktop. This works sometimes, sometimes not. When it doesn't, moving the mouse doesn't eliminate the black screen, although I can see the mouse cursor. ctrl+alt+del does nothing, neither do alt+tab, alt+esc or ctrl+alt+esc. ctrl+alt+f1-12 work as they usually do, so I can "sudo /etc/init.d/gdm restart" from one of the TTYs, or via ssh.

I tested just now with setting the screensaver and power management display blanking to 1 minutes. After a minute the screen went blank (backlight on), and then after a second or two black (backlight off), and moving the mouse returned to Gnome as it should. So I don't know why sometimes it doesn't. Two questions:

1- Which program can I run, or which service can I restart, to return to Gnome without having to kill gdm and lose all open windows?

2- What's causing this?

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[Code]....

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