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I upgraded 13.04 to Gnome 3.8. Everything worked perfectly before the upgrade.

After the upgrade, I have 2 problems:

  1. I can't turn off my computer from the menubar, but I am able to use the terminal to shut down the computer.

  2. I can't use any of the other drives in my computer. When I do, it gives me this error message:

    Unable to access "16 GB Volume" Not authorized to perform operation.
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Yes, bad idea indeed. Try to revert the changes and go back to the Supported (from Ubuntu) gnome version. If you upgraded to 3.8 using the ppa:gnome3-team/gnome3, then run in terminal sudo apt-get install ppa-purge and sudo ppa-purge ppa:gnome3-team/gnome3 and sudo apt-get update;sudo apt-get dist-upgrade –  NikTh Jul 11 '13 at 4:29
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