Ubuntu 13.04 Nvidia Optimus Bumblebee

This is how to make Bumblebee works in Ubuntu 13.04 otherwise you will get [ERROR]Cannot access secondary GPU - error: [XORG] (EE) No devices detected.

I have Nvidia GT540M and Intel HD Graphics 3000 on Alienware M11x R3
Open the terminal and follow the instructions below:

1) Add the repository:
sudo add-apt-repository ppa:bumblebee/stable


2) Update the repository index:
sudo apt-get update


3) Install bumblebee:
sudo apt-get install bumblebee bumblebee-nvidia


4) Reboot your system


5) Now we need to get the BusID. Open the terminal again and type:
lspci | grep NVIDIA

It will give you the output:


01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M] (rev ff)

01:00.0 is my BusID


6) We need to edit xorg.conf.nvidia. Install GKSU if it is not installed yet.
sudo apt-get install gksu

7) Edit the file:
gksu gksu gedit /etc/bumblebee/xorg.conf.nvidia

8) Go to section device and add the BusID as below:

Section "Device"

    Identifier  "Device1"

    Driver      "nvidia"

    VendorName  "NVIDIA Corporation"

    BusID "PCI:01:00:0"

Take note, it is BusID 01:00:0 instead of dot 01:00.0

9) Restart your system

10) Test to run the bumblebee

optirun glxspheres

Polygons in scene: 62464
Visual ID of window: 0x20
Context is Direct
OpenGL Renderer: GeForce GT 540M/PCIe/SSE2
134.682392 frames/sec - 150.305550 Mpixels/sec
146.435690 frames/sec - 163.422230 Mpixels/sec
145.848772 frames/sec - 162.767230 Mpixels/sec

That's it! It should run perfectly