It seems that you just lost some packages. Can you please run in the Terminal:
sudo apt-get install ubuntu-desktop unity gnome-session yelp
...and see if this solved your problem?
** Changed in: ubuntu
Status: New => Incomplete
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/882798
Title:
installed "gnome shell" and lost ubuntu doc
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+bug/882798/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs