I am using Ubuntu 14.04 LTS
I didn't find a solution to my problem anywhere (even though I read countless threads about Nvidia drivers) and I am starting to think that it may be hardware problem. I install drivers using (among others)
sudo apt-get install nvidia-current
And when it is installed i check:
lspci | grep VGA
But I get identical result as when I typed it before installation, that is:
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Moreover, when I reboot Ubuntu, it runs in low graphics mode, but starts normally after I uninstall drivers.
I tried reinstalling the system, but it also brought no effect at all.