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I followed the second answer of this question to install nvidia drivers on my lenovo z570. But now, as a result, My ubuntu 14.04 is unresponsive. Mouse clicks not working. The login screen looks perfect, but after typing in the password, the screen's resolution changes to very low and nothing works...

Will i have to reinstall Ubuntu again ? or if any, what is the procedure to revert back the changes (uninstall all nvidia drivers).

Any help would be appreciated greatly.

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thundrstorm
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1 Answers1

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First boot recovery mode https://wiki.ubuntu.com/RecoveryMode

Then remove the current driver

sudo apt-get remove --purge bumblebee bumblebee-nvidia primus nvidia-331

Now you can boot to your full install again, open a terminal,

Then try installing again but with two commands

sudo apt-get install bumblebee bumblebee-nvidia primus

Reboot to confirm this is not the issue

Then run

sudo apt-get install nvidia-current

Reboot

To switch between the two different GPUs first make sure this is installed and your system is upto date

sodo apt-get install linux-headers-generic && apt-get upgrade

Now install this 

sudo apt-get install bbswitch-dkms

This should allow you to use the switch on your laptop to switch GPUs

Mark Kirby
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  • Thank you for your reply. I have got my Ubuntu running now. BUT I am still unable to use my GPU. Nothing happens(GPU LED does not glow) when I press the GPU switch on my laptop. I would like to see the option 'GPU' in BLENDER. Please help. – thundrstorm Aug 29 '14 at 05:50
  • Please tell me, do you have two GPU in your laptop ? (Is this what the "GPU switch is for) If so please tell me what is the second GPU (likely Intel HD something) – Mark Kirby Aug 29 '14 at 06:30
  • Updated the anser for you – Mark Kirby Aug 29 '14 at 06:50
  • yes, I have two GPUs in my laptop. They are : NVIDIA GeForce GT520M & Integrated Intel HD Graphics 3000. – thundrstorm Aug 29 '14 at 06:52