Ubuntu – Nvidia GeForce GTX 750 ti doesn’t work in Ubuntu

I had the same problem, tried every answer i could found on the net and it didn't work.

if you are in this case :

• on startup your bios is visible only with your nvidia card
• ubuntu is visible only with the motherboard screen outpout

the reason seems to be the bad detection of device with modern bios (new motherboard, and relative old video card).

Try doing the following : first follow the indications there : http://ubuntuguide.net/how-to-install-nvidia-graphics-driver-in-ubuntu-10-10-maverick-meerkat ie :

• do the install of nvidia-current as suggested everywhere
• make sure you have a xorg.conf file in /etc/X11/
• once you are back on your problem with black screen etc, the idea is to have a terminal open from now. if you have it go to next step, otherwise try : connect your monitor to the motherboard outpout, reboot, go to the grub (double shift on startup after the bios), select the option advanced option for ubuntu, connect internet and go root console.
• edit the xorg.conf file : sudo nano /etc/X11/xorg.conf

• and once there : what did change everything is to add the line

  BusID "PCI:01:00:0"

in the section "Device", in my case that give this code :

Section "Device"
  Identifier     "Device0"
  Driver         "nvidia"
  VendorName     "NVIDIA Corporation"
  BusID          "PCI:01:00:0"
EndSection

save (ctrl+x), connect your monitor to the nvidia card and reboot, in my case, this solved the problem.

You did all wrong (almost). Run

sudo apt-get purge nvidia*
sudo apt-get purge bumblebee* primus
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-352 nvidia-prime
sudo add-apt-repository -r ppa:bumblebee/stable

and hope that you did not spoil everything completely with previous attempts.