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I have the choice of the Nvidia 185 driver and the experimental one. My Laptop is an Acer aspire 5750G with intel sandyBridge i5.

I just installed Bumblebee.Then I enabled the Card, and ran "nvidia-settings". A window saying:

You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run nvidia-xconfig as root), and restart the X server.

But it seems, nvidia-xconfig is not installed on my computer.

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The current nvidia driver (nvidia-current) in Natty is version 270.41.06 which does not support your GT 540M. 280.13 does support it though. You can get it by installing the ubuntu-x-swat/x-updates PPA:

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-current

As for Bumblebee, see How well do laptops with Nvidia Optimus work? for the latest installation instructions. After installing that version, you can get nvidia-settings to run with:

nvidia-settings -c :8
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I got mine working using this guide.

For cardoff:


For cardon:


Remove the Nouveau driver as described here.

Edit the Grub config using:

sudo nano /etc/default/grub


GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux pcie_aspm=force acpi=noirq i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1"
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That blogpost has been superseded by…. cardoff and cardon are not used anymore since Bumblebee 3.0. See – Lekensteyn Feb 9 '12 at 15:58

You can also download the latest version from the NVidia's website:

Nvidia - Linux Display Driver - x86

To install it you better restart your computer in the console mode, remove everything you have from the old driver and reinstall the new one.

To remove the old driver:

sudo apt-get purge nvidia*

To install the new driver (the one you downloaded from the website), considering that you're into the directory where the installation file is:

sudo sh

After that you'll need to restart your computer:

sudo reboot now

Now your nvidia driver might be updated :-)

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Not applicable for Optimus laptops, it breaks 3D – Lekensteyn Jan 22 '12 at 23:52
I second this. I don't want to downvote because the author probably meant no arm, but it's a pain to recover from what following these instructions would do to your ubuntu. – user2413 Aug 22 '12 at 18:24

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