[ 440.617737] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) NVIDIA(0): Failed to assign any connected display devices to X screen 0

Can you give the output of:

sudo lshw -C display; lsb_release -a; uname -a; dpkg -l | grep nvidia

Thanks

  *-display
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list
       configuration: driver=nvidia latency=0
       resources: irq:16 memory:b8000000-b8ffffff memory:a0000000-afffffff memory:b0000000-b1ffffff ioport:6000(size=128)
  *-display
       description: VGA compatible controller
       product: Ivy Bridge Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:44 memory:b9000000-b93fffff memory:c0000000-cfffffff ioport:7000(size=64)
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
Linux mamoni 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
ii bumblebee-nvidia 3.0.1-1~preciseppa1 nVidia Optimus support using the proprietary NVIDIA driver
ii libkwinnvidiahack4 4:4.8.4a-0ubuntu0.1 library used by nvidia cards for the KDE window manager
ii nvidia-cg-toolkit 3.0.0016-0ubuntu1 Cg Toolkit - GPU Shader Authoring Language
ii nvidia-common 1:0.2.44 Find obsolete NVIDIA drivers
ii nvidia-current 302.17-0ubuntu1~precise~xup2 NVIDIA binary Xorg driver, kernel module and VDPAU library
ii nvidia-current-dev 302.17-0ubuntu1~precise~xup2 NVIDIA binary Xorg driver development files
ii nvidia-current-updates 295.49-0ubuntu0.2 NVIDIA binary Xorg driver, kernel module and VDPAU library
ii nvidia-current-updates-dev 295.49-0ubuntu0.2 NVIDIA binary Xorg driver development files
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

Abhik

Oh, is it one of those dual GPU system (switchable video chips).

Here it is
  *-display
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list
       configuration: driver=nvidia latency=0
       resources: irq:16 memory:b8000000-b8ffffff memory:a0000000-afffffff
memory:b0000000-b1ffffff ioport:6000(size=128)
  *-display
       description: VGA compatible controller
       product: Ivy Bridge Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:44 memory:b9000000-b93fffff memory:c0000000-cfffffff
ioport:7000(size=64)
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
Linux mamoni 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
ii bumblebee-nvidia
3.0.1-1~preciseppa1 nVidia Optimus support using the
proprietary NVIDIA driver
ii libkwinnvidiahack4
4:4.8.4a-0ubuntu0.1 library used by nvidia cards for
the KDE window manager
ii nvidia-cg-toolkit
3.0.0016-0ubuntu1 Cg Toolkit - GPU Shader Authoring
Language
ii nvidia-common
1:0.2.44 Find obsolete NVIDIA drivers
ii nvidia-current
302.17-0ubuntu1~precise~xup2 NVIDIA binary Xorg driver, kernel
module and VDPAU library
ii nvidia-current-dev
302.17-0ubuntu1~precise~xup2 NVIDIA binary Xorg driver
development files
ii nvidia-current-updates
295.49-0ubuntu0.2 NVIDIA binary Xorg driver, kernel
module and VDPAU library
ii nvidia-current-updates-dev
295.49-0ubuntu0.2 NVIDIA binary Xorg driver
development files
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

Cheers
Abhik

On Sat, Aug 11, 2012 at 8:11 PM, actionparsnip <
<email address hidden>> wrote:

> Your question #205573 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/205573
>
> Status: Open => Needs information
>
> actionparsnip requested more information:
> Can you give the output of:
>
> sudo lshw -C display; lsb_release -a; uname -a; dpkg -l | grep nvidia
>
> Thanks
>
> --
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/ubuntu/+question/205573
>
> You received this question notification because you asked the question.
>

Yeah you said "Nvidia optimus"

Nvidia have said they will not be supporting this outside of WIndows. I have not seen a single success with this mess. This link may help:
https://help.ubuntu.com/community/HybridGraphics