I have an Alienware m17x laptop with a NVIDIA GeForce GTX 460m graphics card and Intel HD 3000 integrated graphics. I recently reinstalled Windows 7, and I decided to install it side by side with Ubuntu 12.04 LTS. For my Windows setup I want to use only the graphics card, and in Ubuntu I'd like to use the integrated graphics.
I originally wanted to use only the graphics card for both operating systems, but it doesn't work properly with Ubuntu, or at least I haven't been able to get it to. On my previous Windows installation to turn off the integrated graphics I just disabled it in the BIOS. This time around I can't do that because Ubuntu won't display at all without it enabled.
I tried going into the device manager in Windows and simply disabling the integrated graphics from there. This made it so my monitor would not display at full resolution, so I tried to go into the NVIDIA settings in the control panel, but it told me "You are not currently using a display attached to an NVIDIA GPU". I have no idea what it thinks my display is connected to, since there are only two options and one of them is disabled, but it doesn't seem to think it's using the GPU.
For the time being I've just been turning the integrated graphics on and off in the BIOS depending on which OS I want to use, but I'd like to find a more reasonable solution.