I downloaded Ubuntu 11.04 and it was working fine until I started tweaking compiz and rebooted. It took 3 to 4 minutes to boot up. When I press enter at the boot menu, there is a black screen with something flickering on the top left corner, which is normal, but for me the black screen stays for 4 to 5 mins. It is driving me crazy. Please explain your answer as I am not the terminal stuff.
I'm on 11.10 with
So I decided to look if some processes related to nVidia differ in both boots.
And indeed I found out that
That lead me to conclusion that disabling
For sure it is not the solution, but at least a direction to look.
Hope this helps.
P.S. Make sure you know what are you doing while dealing with system files.
you can try to trace down the issue by installing bootchart available in repos. http://en.wikipedia.org/wiki/Bootchart