I still see this particular phenomenon, using gnome-shell 3.4.2-7. My X
display still seems to be working fine, the mouse pointer moves around
and if left alone the display blanks after the usual timeout, then comes
back after I move the mouse. However no key presses or mouse clicks
seem to register within the desktop.
The one thing I can do is Ctrl-Alt-F1, to switch to a text terminal, log
in again and do "killall -HUP gnome-shell" which causes gnome-shell to
exit and re-start and all is going again.
My extra data point is that this is often associated with a flurry (say
up to a dozen) of notifications from nonsense users popping up at the
bottom of the screen.
People with names like "squeezybuttocks...@hotmail.com" wanting
permission to know when I'm on line. These appear in a flurry
immediately after I've re-started gnome-shell. Could there be some sort
of cause and effect?
I confess, I don't understand the mechanism by which they arise at all
(I'm not a user of any social media sites).
John
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