i have recently installed Ubuntu 12.04 in a Intel Ivy Bridge with integrated graphics and NVidia GPU with Optimus tech, however i cant manage it to work properly. I have already passed by the solution of bumblebee project, however iam got the following message when try to run anything with nvidia card( e.g. with optirun firefox):

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

Since the nvidia card is not working properly, some softwares like Scilab, that make use of X11 system for graphic handling and plotting, wont work too.

my bios has no option concerning graphics card and the log of daemon returned:

Jul 5 16:10:51 humannoise-W251ESQ-W270ESQ bumblebeed[980]: Module 'nvidia' is not found. 
Jul 5 16:10:51 humannoise-W251ESQ-W270ESQ kernel: [ 17.943272] init: bumblebeed main process (980) terminated with status 1 
Jul 5 16:10:51 humannoise-W251ESQ-W270ESQ kernel: [ 17.943288] init: bumblebeed main process ended, respawning 
Jul 5 16:10:51 humannoise-W251ESQ-W270ESQ bumblebeed[1026]: Module 'nvidia' is not found.

The lspci -nn | grep '\[030[02]\]:' returned:

00:02.0 VGA compatible controller [0300]: Intel Corporation Ivy Bridge Graphics Controller [8086:0166] (rev 09)
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:0de9] (rev a1)

Ok, for the command dpkg -l | grep '^ii' | grep nvidia i got :

ii  bumblebee-nvidia                       3.0-2~preciseppa1                         nVidia Optimus support using the proprietary NVIDIA driver
ii  nvidia-current                         302.17-0ubuntu1~precise~xup1            NVIDIA binary Xorg driver, kernel module and VDPAU library
ii  nvidia-current-updates                 295.49-0ubuntu0.1                       NVIDIA binary Xorg driver, kernel module and VDPAU library
ii  nvidia-settings                        302.17-0ubuntu1~precise~xup3            Tool of configuring the NVIDIA graphics driver
ii  nvidia-settings-updates                295.33-0ubuntu1                         Tool of configuring the NVIDIA graphics driver

After full reinstallation, including the remove of any previous nvidia drive, lsmod | grep -E 'nvidia|nouveau' returned:

nvidia              10888310  46

dmesg | grep -C3 -E 'nouveau|NVRM' returned things like:

[ 1875.607283] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 1875.607289] nvidia 0000:01:00.0: setting latency timer to 64
[ 1875.607293] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none
[ 1875.607363] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  302.17  Tue Jun 12 16:03:22 PDT 2012
[ 1884.830035] nvidia 0000:01:00.0: PCI INT A disabled
[ 1884.832058] bbswitch: disabling discrete graphics
[ 1884.832960] bbswitch: Result of Optimus _DSM call: 09000019

Some programs, like Scilab, are now working fine under optirun(e.g. >optirun scilab) call.

Thank you.