I have an recurring problem. Every once in a while, no pattern, the laptop freezes during boot. Sometimes at a black screen, sometimes a black screen with a not blinking cursor...

The solution is to power down the laptop, cross my fingers and boot again. Sometimes it takes four or five reboots, but in the end I always get the system up and running.

What bugs me is the fact that the boot is not 'stable' in a sense that apparently it doesn't always do exactly the same thing.

I'm still using 10.10. The question is whether there is anything that can be done to make the system stable. (Does 11.04 have the same issue?)

Edit: Today the same thing happened. First a black screen with a non blinking cursor. Second a black screen. Third login screen.