Possible Duplicate:
How well do laptops with Nvidia Optimus work?
i upgraded ubuntu to 12.04, i have lenovo ideapad with GT540M 2GB graphic card, 2nd gen i5 processor. when i installed nvidia drivers, screen resolution changed to 640X480, can nvidia drivers be installed, coz i have tried many ways and took help of almost all discussions on this site. is this problem of optimus or anything else. please help me out.
If you have hybrid graphics and installed the nvidia-drivers without bumblebee you are in for a lot of touble! Just kidding...
Remove the nvidia proprietary drivers either by sudo apt-get autoremove --purge nvidia* or through synaptic (if you have it installed) then reboot.
Now:
follow the instructions on this wiki about how to properly install bublebee with nvidia drivers and enjoy your laptop to its fulliest!
In case you are still getting low resolution you should delete Xorg.conf file
$ sudo rm /etc/X11/Xorg.conf
While following this procedure it is better you should not start X server
Instead login through text mode.
To login to text mode use the following
$ sudo vi /etc/default/grub
Change GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="text"
and $ sudo update-grub
After installing nvidia-current and bumblebee, revert the changes in /etc/default/grub to login into graphical mode.
