since todays update for gnome in ubuntu gnome 14.10 this suddently happend to me too. 99% of all keyboard shortcuts stopped working including media keys, custom keys. actully so it seems all but alt+tab, alt+F2 and the super commands to to open the aktivities or application menu, and the desktop navigation is still wokring.
but i think more or less anything else isn't working anymore, even not screen shot with printkey.
The keys themself are working as i am able to set them in the settings, they are recognized by the settings programm.
since todays update for gnome in ubuntu gnome 14.10 this suddently happend to me too. 99% of all keyboard shortcuts stopped working including media keys, custom keys. actully so it seems all but alt+tab, alt+F2 and the super commands to to open the aktivities or application menu, and the desktop navigation is still wokring.
but i think more or less anything else isn't working anymore, even not screen shot with printkey.
The keys themself are working as i am able to set them in the settings, they are recognized by the settings programm.