After updating to Ubuntu 13.04 (from 12.04) I've got a blackscreen at boot. The machine is running fine as I hear the startup sound to enter my password, I just don't see anything.
I started using GRUB mode and nomodeset, everything is working then but the machine is extremely slow (not usable).
Sounds like there is a problem with the integrated intel graphics driver in Ubuntu 13.04 (64-bit).
Does anyone have a solution to my problem?