Dear Maintainer,

   * What led up to the situation?

Setting the Viewer of virt-manager to fullscreen mode. I used virt-manager with
KVM on a desktop system to run a windows guest.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

After using the guest OS for a very short while, it gets completely
unresponsive to mouse events. Then I managed to shutdown the guest OS with
the keyboad an finally mimized the viewer. This made context menu of the
host's gnome desktop visible that seem to be already "sitting there" in
the beackground and blocking the mouse interaction.

When using the guest OS in the viewer while not in full-screen mode, anything
works fine!

Hello,
recently I discovered that the same problem exists with the Steam client
in full-screen mode. Perhaps this is an event handling problem of...
whaterver deeper platform, I don't know: the gnome desktop, compositor,
XOrg, ...?

Best regards
M. Perlick