, I've been having problems with the optimus tech that nvidia is using now days and that my laptop happens to have. After a short while I found the bumblebee project and decided to give it a try. It works quite well. I tested it with some games, even with games emulated with wine and, apart from the inconvenience of typing an extra string for half commands, it seamed a good solution. but... I just discovered that this change made the virtual terminals of my X to go blank and this, apart from being bad on it's own, is not allowing me to switch users because when I try it takes me to a blank screen (that after some reading I guess is a blank screen in tty8).
I'm trying to switch users instead of just logging of because I have set up my virtual machine to be selected from gdm on user select. (but that hardly has anything to do with the current problem
intel i7 2.4ghz
graph card: Nvidia GEforce GT 540m cuda 2GB
Ubuntu 12.04 (dualboot with windows, but that matter not)
mmm dont see what else could be helpful to share here, if you need more info plz let me know
Problem synthesis: my X server's virtual terminals are showing up black screens except for tty7, in which the graphic interface works fine.