Up graded from 13.10 to 14.04 using pop up upgrade recommendation. No problems during upgrade. After restarting and logging in, none of the enu bars are visible. Displays desktop image and mouse can be seen, but unable to open anything or even shut it down properly. Any idea what might have happened and/or how to fix it?
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- Press Ctrl+Alt+F1 and log in{enter your passward}.
Enter this command
sudo apt-get install compizconfig-settings-manager
Then run it by doing this:
export DISPLAY=:0 ccsm
The first part tells the terminal which display you want it to load on (otherwise it won't have a clue).
Press Ctrl+Alt+F7 (or Ctrl+Alt+F8 sometimes) to get back to the graphical display where there should be a CompizConfig Settings Manager screen sitting there.
Press Ctrl+Alt+T and enter this command
ccsm
now find unity plugin and enable it.

Naz
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This may have been helpful right up until I tried to reinstall 13.04 from USB and when that didn't work... using gparted to try (unsuccessfully) to format the drive. Now all I get is aa black screen. The encryption seems to be preventing me from formating. Maybe that interfered with the upgrade...? – Rich Jun 03 '14 at 06:06