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.