After installing Bumblebee and Nvidia 331.38 driver with primus I get this error
delmomd@Dell:~$ optirun steam
[ 887.242992] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
[ 887.243047] [ERROR]Could not connect to bumblebee daemon - is it running?
After searching for solution on the internet I've found out that Ubuntu does not detect my Nvidia card. I haven't found any way to turn on optimus in BIOS. Any ideas how I can detect my GPU and use Bumblebee again? Funny thing is that I had this problem on SteamOS too, that's why I've returned to Ubuntu.
My laptop: Dell inspiron 7720, GPU: Nvidia Geforce 650M
EDIT: That's one of the ways I've discovered that Ubuntu does not detect my card:
delmomd@Dell:~$ sudo bumblebeed restart
[sudo] password for delmomd:
[ 649.003957] [ERROR]No discrete video card found, quitting