I recently purchased a LG a410 notebook, with Nvidia GeForce 310M GPU. When i installed Ubuntu (11.10) my battery used to last about 3 hours. But, since i moved to Gnome3, i noticed that i didnt have the proper graphics driver installed. So, i installed the Nvidia drivers, and everything, including 3d works perfect. The problem is: my battery now lasts only for less than 1 hour. I have read on some forums that Nvidia Drivers are known to consume more battery power. Since my GPU does not seem to have the "optimus" technology, there is no use to try the "bumblebee project". I had the idea to add to grub the option of loading OR NOT the nvidia graphics. This way, when i wanted to save battery, i would boot into the "no nvidia mode". But i have had no success on disabling the Nvidia drivers. I have tried to add it to the /etc/modprobe.d/blacklist.conf as "blacklist nvidia", "blacklist nvidia-common", and "blacklist nvidiabl" but nothing seems to work.
Is there a way i can choose between booting WITH or WITHOUT the nvidia drivers??
Obs: changing the xorg.conf file to Driver "nv" or Driver "intel" does not work (x does not start)