GNOME Bugzilla – Bug 689288
In overview mode all keys event are sent to gs stage
Last modified: 2012-11-29 15:32:37 UTC
This means that gnome-settings-daemon is skipped and will not receive any events. I.e. no media key events, brightness, monitor selection, touchpad enable/disable, sleep, battery status etc.
Yes, this is a known bug and an unfortunate consequence of active X11 grabs. Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find. *** This bug has been marked as a duplicate of bug 643111 ***