I'm using Ubuntu 14.04, after updating the Unity doesn't load. The sidebar and topbar disappear. On the main screen, there are only the background and the pointer. I've solved this problem by entering these commands
sudo apt-get update sudo apt-get install --reinstall ubuntu-desktop sudo apt-get install unity sudo apt-get remove --purge nvidia* sudo shutdown -r now
After rebooting, the side bar does appear, however now the mouse pointer disappears. I make the pointer visible by entering this command:
gsettings set org.gnome.settings-daemon.plugins.cursor active false
The mouse pointer now appears but it does not move (it freezes). Can someone guide me how to solve this problem ?