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I am using Dell Latitude E6510 laptop with Ubuntu 12.10 running on it. It has Nvidia GT218 NVS 3100M. I am using Gnome-Fallback mode.

My problem is that my laptop was just working fine. However, it was having very high temperatures (+70 degrees normally). So I read about some blogs, where someone advised to install Jupiter and nvidia-bumblebee. So I installed these 2 softwares.

However, with Jupiter, I was unable to change the screen resolution. Neither it was able to detect the external monitor. Though my laptop was super-cool. It was running at 50-60 degrees. But since this being useless, as I always use an external monitor, I uninstalled both the softwares. Also I realised that I don't have Optimus support on my laptop.

Now I am unable to go back to the initial settings. I am stuck up at 800 x 600 resolution. When I try to run nvidia-settings I get an error message 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

I tried to run nvidia-xconfig, but it didn't work. The error remains the same.

I tried to find help on internet on lot of forums. I tried to re-install the nvidia packages, but it didn't work. Also I tried to use nouveau driver, and then again install nvidia drivers, the problem is still the same.

Could someone please let me know how do I solve this?

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up vote 1 down vote accepted

Oh I tried the following commands to remove bumblebee completely and it worked !

sudo apt-get install ppa-purge
sudo ppa-purge ppa:bumblebee/stable
sudo apt-get purge bumblebee
sudo apt-get --purge autoremove

Thank You !

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