I remember having this error a while back.
It wasn't fixed by me though. I'd say try a different driver version.

i'll try that with the last 319.17

I'll check what version I have later. I'm in Windows right now.

I have:
Nvidia 319.17
Bumblebee 3.2.1

can you tell me from were did you install your drivers ? seems there's no version available from xorg-edgers for my ubuntu 12.04 64 bits :(

(Getting this error :
Package nvidia-319 is not available, but exists in the database.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package nvidia-319 has no installation candidate)

BTW I'm running with Bumblebee Version: 3.2.1-1~preciseppa3

Well i just installed nvidia drivers 319.23 from here: http://www.ubuntuupdates.org/package/xorg-edgers/precise/main/base/nvidia-319

Downloaded the 64bits package for nvidia-319 and nvidiasettings-319, i intalled the deb packages with software center and... it get worse x). Now bumblebee is dead. RUnning optirun glxspheres:

[ 191.312202] [ERROR]The Bumblebee daemon has not been started yet or the socket path /var/run/bumblebee.socket was incorrect.
[ 191.312313] [ERROR]Could not connect to bumblebee daemon - is it running?

But i have to say that i edited the config file in /etc/bumblebee/bumblebee.conf to get this:

## Section with nvidia driver specific options, only parsed if Driver=nvidia
[driver-nvidia]
# Module name to load, defaults to Driver if empty or unset
KernelDriver=nvidia-319
PMMethod=auto
# colon-separated path to the nvidia libraries
LibraryPath=/usr/lib/nvidia-319:/usr/lib32/nvidia-319
# comma-separated path of the directory containing nvidia_drv.so and the
# default Xorg modules path
XorgModulePath=/usr/lib/nvidia-319/xorg,/usr/lib/xorg/modules
XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

and i did the same for Primusrun in /usr/bin/primusrun


EDIT: Now i reinstalled bumblebee and primus with default 304.88 driver. everything seems to work now. but i'm still getting the same error in steam with primus

Firstly, I don't use Ubuntu anymore.
Secondly, I now remember having to edit my bumbmebee.conf too.
It was the "XorgModulePath" line that pointed to the wrong directory.
Mine goes like this now:

XorgModulePath=/usr/lib/nvidia/xorg/,/usr/lib/xorg/modules

Does bumblebee work for you at all? (glxspheres for example)

Now i managed to install 319.23 drivers correctly... ppa was disabled x) (i enabled it with synaptic), i reedited primus and bumblebee config files and it seems to work:

nova@N53SM-Ubuntu:~$ optirun glxspheres
Polygons in scene: 62464
Visual ID of window: 0x21
Context is Direct
OpenGL Renderer: GeForce GT 630M/PCIe/SSE2
117.302022 frames/sec - 130.909056 Mpixels/sec
130.286428 frames/sec - 145.399654 Mpixels/sec
125.686615 frames/sec - 140.266263 Mpixels/sec
127.413727 frames/sec - 142.193719 Mpixels/sec
130.689596 frames/sec - 145.849589 Mpixels/sec
127.309368 frames/sec - 142.077255 Mpixels/sec

______________________

nova@N53SM-Ubuntu:~$ vblank_mode=0 primusrun glxspheres
Polygons in scene: 62464
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
Visual ID of window: 0xa0
Context is Direct
OpenGL Renderer: GeForce GT 630M/PCIe/SSE2
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
198.223976 frames/sec - 221.217958 Mpixels/sec
201.684920 frames/sec - 225.080371 Mpixels/sec
221.869379 frames/sec - 247.606227 Mpixels/sec
221.996363 frames/sec - 247.747941 Mpixels/sec
224.855281 frames/sec - 250.938493 Mpixels/sec
223.483882 frames/sec - 249.408012 Mpixels/sec

But still getting the same error with primus on steam :/

And now i get this message when i launch steam:

Your currently installed video driver package, ligl1-mesag-dri, has a new version: 9.0-ubunt1.
We recommend upgrading your system to this new driver package.

sould i do this upgrade ?

I fixed it ! :)

I just replaced the "primusrun" command in steam by "optirun --brigde primus' in the TF2 Launch Options and it worked ^^ i didn't know this command, i found it on Bumblebee website, and tf2 runs well :)

Anyway thanks for your help !

"optirun --bridge primus" (or "optirun -b primus") is the same as "primusrun".
"optirun -b virtualgl" is the same as "optirun".
They merged both commands together so that instead of having two seperate commands, you have one with the option to chose either primus or virtualgl.

I don't know where the mistery is :d but TF2 don't run with "primusrun" in my case x)

Maybe it's outdated, since it has been replaced.

i installed the 32bit version of virtualgl, and it works now!

apt-get install virtualgl:i386

For those who wants to use primus, the trick is almost the same :
apt-get install primus:i386