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I'm kindof a noob when it comes to Ubuntu/not windows so please pardon my inexperience.

I've been messing around with Ubuntu 14.04 on my Macbook Pro (9,1 mid 2012, non retina), installed as a dual boot with OS X (with rEFInd).

In my noobishness I tried to have a wack at Bumblebee to see if GPU switching would work. Well, now I get a black screen after the purple Ubuntu screen with the dots. It appears the computer is booting up, and if I type my password and hit enter, it appears to login, just there's no video output after the Ubuntu screen, just black.

For reference I was using the most recent nVidia proprietary drivers (331.xx i think) supplied by the "additional drivers" utility. (card is a GT 650M)

Is there any way to uninstall bumblebee/fix this, or should i just give up and reinstall (its not a actively used install, but i have put a good number of hours into configuring it)?

Thanks in advance for any help.

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/etc/bumblebee.conf needs to be edited... if you do not use nvidia-current (-> nvidia-331)

there should be no /etc/X11/xorg.conf of any kind

sudo update-alternatives --config i386-linux-gnu_gl_conf

and

sudo update-alternatives --config x86_64-linux-gnu_gl_conf

(or the mac equivalent) should be set to mesa.

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To remove rather than fix ..

Login using a rescue CD, mount your disks, enable networking and drop to root. Then remove Bumblebee bee using one of the methods (I'd purge) below and reinstall Nvidia 331.

Uninstall just bumblebee-nvidia

sudo apt-get remove bumblebee-nvidia

This will remove just the bumblebee-nvidia package itself.

Uninstall bumblebee-nvidia and it's dependencies

sudo apt-get remove --auto-remove bumblebee-nvidia

This will remove the bumblebee-nvidia package and any other dependant packages which are no longer needed.

Purging your config/data too

If you also want to delete your local/config files for bumblebee-nvidia then this will work.

Caution! Purged config/data can not be restored by reinstalling the package. sudo apt-get purge bumblebee-nvidia Or similarly, like this

sudo apt-get purge --auto-remove bumblebee-nvidia

Reinstall Nvidia drivers

sudo apt-get install --reinstall nvidia-331 nvidia-331-update

source : http://installion.co.uk/ubuntu/saucy/universe/b/bumblebee-nvidia/en/uninstall/index.html

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