I have a Nvidia video card, but also a built in Intel HD graphics. On windows I can do 3 screens with 2 screens on the nvidia and the third on the Intel card. Is this also possible in Ubuntu? Because Ubuntu doesn't detect the third screen. I have Ubuntu 14.0.
Same problem here...
$ lspci 00:02.0 Display controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF116 [GeForce GTX 550 Ti] (rev a1)
Proprietary Nvidia driver 352.63
To work with this config, need to enable xinerama inside xorg.conf and configure both cards.
Unity don't like xinerama, xorg get poor performance. I used openbox to test.
Removing proprietary nvidia driver, and using nouveau opensource driver, all works, but nouveau is unstable with my card and xorg crash.
$ xrandr --listproviders Providers: number : 2 Provider 0: id: 0x2b3 cap: 0x1, Source Output crtcs: 2 outputs: 4 associated providers: 0 name:NVIDIA-0 Provider 1: id: 0x48 cap: 0x2, Sink Output crtcs: 3 outputs: 6 associated providers: 0 name:Intel
then set output
$ xrandr --setprovideroutputsource 1 0 $ xrandr --auto