I upgraded to 12.04 and had problems with unity. So this is what I did 1) Ctrl + Alt + F1 sudo apt-get install compizconfig-settings-manager Export DISPLAY=:0 ccsm 2) Ctrl + Alt + F7 3) Enabled unityplugin 4) Ctrl + Alt + F1 unity --replace it worked with a couple of error messages now I have to put in start up application export DISPLAY=:0 unity --replace NVIDIA software recognises my monitor but ubuntu sees it as laptop. something isn't right can someone point out what info I need to put here for people to help. I have been upgrading this from 8 ish so have altered lots especially when compiz fusion first came out. Also if I run recovery session and type 'unity --replace' it starts and runs fine.