Public bug reported:

Release: Ubuntu Gnome 14.04 on both x32 and x64.

When enabling the desktop zoom accessibility feature,  all the system
became unresponsive immediately after reaching the default zoom level.
The gnome-shell top bar disappeared, the mouse cursor couldn't move, and
I was unable to switch to another virtual desktop. After a few seconds,
the mouse cursor became able to move, but sluggishly, and interact with
the windows.  The top bar didn't re-spawn,  nor was I able to reach
another virtual desktop or to disable the zoom effect.  The only I could
do was to drag the window around on the screen, which produced
artifacts, leaving blackness in its wake where it passed over the
desktop wallpaper.

I will not try to reproduce the bug again, having switched to Xubuntu
since.

I'm attaching my lshw output.

** Affects: gnome-control-center (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: gnome3 zoom

** Attachment added: "lshw output"
   
https://bugs.launchpad.net/bugs/1309926/+attachment/4088759/+files/lshw_output.txt

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https://bugs.launchpad.net/bugs/1309926

Title:
  gnome-shell crashes when enabling zoom

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