Black screen after Ubuntu 11.10 reboot solved?

view full story

http://askubuntu.com – Just yesterday evening installed Ubuntu 11.10 as dual boot with Win Vista. All was fine for some 3-4 boots/restarts. Now this morning, tried to boot into Ubuntu. Hit a black screen after the grub screen, upon selecting ubuntu 11.10 to boot. Thank fully vista boots fine leaving me with some thing. I do see this has been some what discussed earlier. Is a final solution out there anywhere? Help greatly appreciated. (HowTos)