I upgraded to 12.04 and now applications are very slow to launch. For example, I open up the update manager and after about 10 seconds the window appears with a solid white background and then I wait for about 50 seconds and nothing happens. Then I open a Terminal and it appears very fast and the widgets in the update manager also appear.
Another example I open a terminal and I wait about 20 seconds and the Terminal window won't appear. So then I open another Terminal and the two windows appear but it takes about 10 seconds for the prompt to appear.
I was previously running 10.10 on /dev/sda2 with my /home in /dev/sda1. Then I installed 12.04 in /dev/sda3 and after some testing mounted /dev/sda1 to /home.
I've checked my swap (with 'free') and it exists.
Any tips would be appreciated.