I have ubuntu 14.04 installed. My Graphics Card is Nvidia GeForce GT755M SLI

Whenever i enable SLI or MultiGPU the screen goes black after bootlogo. The bootlogo appears, when the bootload is finished screen goes black and i cant do anything. I have to shutdown the computer with the power button.

I tried to enable SLI in two different ways.

  1. By editing the xorg file in /etc/X11/xorg.conf

Section "Screen"

Identifier     "Screen0"
Device         "Device0"
Monitor        "Monitor0"
DefaultDepth    24
Option         "Stereo" "0"
Option         "metamodes" "nvidia-auto-select +0+0"
Option         "SLI" "on"
Option         "MultiGPU" "off"
Option         "BaseMosaic" "off"
SubSection     "Display"
    Depth       24


I also tried turning the MultiGPU but still got blackscreen Then i turned both on and still got blackscreen.

  1. I tried to enable it by running the following commands in terminal

sudo nvidia-xconfig --sli=On

I still experienced blackscreen

I also enabled MultiGPU by using the following command

sudo nvidia-xconfig --MultiGPU=on

still did not help

Please answer if you have any solutions.


Computer: Lenovo Y510P

Graphics card: Nvidia GeForce GT 755M SLI

Processor: 4th Gen Intel® Core™ i7-4700MQ (2.4GHz 1600MHz 6MB)


Suggestion: Disable "Allow Flipping" under OpenGL Settings in the NVIDIA X Server Settings.

You will see what those settings are, from a terminal window, with cat /etc/X11/xorg.conf

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