[Bug 68950] screensaver starts first time but not after

[nyarla33]

Public bug reported:

Binary package hint: gnome-screensaver

In gnome-screensaver-preferences I set the screensaver to start after 6 minutes.
In gnome-power-preferences I set the display to sleep after 20 minutes.

Everything is normal at first: 
- after 6 minutes, screensaver starts.
- after 20 minutes, display sleeps.

After that, I move the mouse or press a key. Display comes back.

But after 6 minutes (if I do nothing),screensaver doesn't start, display
directly sleeps.

If I press Ctrl-Alt-L, I get the same behaviour.

Using Edgy.

** Affects: gnome-screensaver (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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screensaver starts first time but not after
https://launchpad.net/bugs/68950