I've done a clean install of Ubuntu 12.04 from a liveCD on a Samsung Series 7 Chronos with a 3rd Gen i7 and the Nvidia GeForce GT 640M.
I've followed this: (https://wiki.ubuntu.com/Bumblebee#Installation) to install bumblebee so I can switch to my discrete GPU. I have not used ironhide, or preivous bumblee since it's a clean install.
When I use optirun, optirun says it can't initialize the GPU:
[ERROR]Cannot access secondary GPU - error: [XORG] (EE) NVIDIA(0): Failed to initialize the NVIDIA GPU at PCI:1:0:0. Please [ERROR]Aborting because fallback start is disabled.
I've looked at the troubleshooting page for bumblebee and I have the correct driver and do not think I have aspci disabled.
Also, my keyboard becomes very unresponsive and my mouse skips and isn't smooth after optirun crashes. The only thing to fix this is a reboot.
Here's my lspci | grep VGA output:
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fd2 (rev ff)
It seems Ubuntu can see my graphics card. I don't really know what's going on.