Yes, "voodoo" is a good description of the workarounds I use to get back
to a semi-usable desktop (mainly to be able to save any work).

I usually switch to a VT and issue permutations of the following commands (some 
combination often, but not always, works):
$> killall -9 unity
$> unity --replace
$> killall -9 unity-panel-service
$> xrandr --display :0.0 -q
$> xrandr --display :0.0 --auto

/N

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https://bugs.launchpad.net/bugs/1418295

Title:
  Black screen after resuming from suspend

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