I have laptop asus X455ld with core i3 and I installed Ubuntu 14.04. However, I can't switch to nvidia 820m graphic card. How can I resolve this problem?
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Take a look at this question: How to install nvidia GT 840m driver in Ubuntu 14.04? about a similar graphics card to yours (i3 processor and an NVIDIA GT 840M graphics card), except that he installed the wrong graphics card driver to begin with. – karel Jan 11 '15 at 09:24
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I have same laptop as yours.
I installed Nvidia drivers successfully. If possible check whether your system is 32-bit or 64-bit and after installation don't start the lightdm service.
Open the terminal and run the following commands:
sudo service lightdm stop
sudo init 3
sudo chmod +x <file_name>.run
sudo sh <file_name>.run
sudo apt-get update
sudo apt-get upgrade
sudo service lightdm start
sudo reboot
If it's not working, then try reinstalling your desktop environment.
karel
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