I have an Asus UX32VD that has a Nvidia 620M card along with the integrated Intel graphics. I had Ubuntu 13.04 and I could use the Nvidia card with bumblebee for some time, then I it stopped working after a kernel or drivers update(don't remember) and I was busy and lazy to fix it and I didn't really missed using the card.
Then I found there is a partial support from Nvidia for the Optimus technology but it required newer packages versions, I also checked the nvidia-prime package in saucy-salamander made the setup completely painless so I said, What the.. lets upgrade to 13.10 to test the new feature.
I purged bumblebee and everything related to Nvidia and once I had my saucy install working I reinstalled the Nvidia drivers followed by the nvidia-prime package. Now I restart and ... surprise!(actually not a surprise,something like this always happens) no UI, a low graphics mode message and there I am.
Of course I didn't check before the installation with lspci if I had an optimus capable PC because I HAVE AN OPTIMUS CAPABLE PC but doing lspci or checking in dmeseg output I don't see any trace of the nvidia word, my card just disapeared.
Now I don't know how to fix it or what could be the cause. I can only think of two options, a fairy opened my pc and stole the Nvidia chipset while I was sleeping or in the bumblebee time my card got disabled(bbswitch?) and now the system doesn't detect it.
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