Yesterday, I had some updates that Ubuntu(14.04) suggested to install, and I didn't pay attention which programs where updated.
After the update the system needed to restart, but I just clicked
Now, when the pc starts, the screen has lower resolution than it had yesterday and after logging in, the left side bar doesn't appear on the screen.
I remember having problems updating the Nvidia drivers on previous system updates, but I didn't care much because the system was working, and those errors were shown after the update and not after system reboot.
My graphics card is a Nvidia GT540M.
--- EDIT: ---
I cannot open any graphical terminal (I think) after logging in (
T doesn't do anything), nor do anything else. I get stacked with only the background image. I can only open a tty terminal, but then I cannot run graphcal commands like:
I think that the problem might come from nvidia so I wanted to uninstall it. If I run:
$modprobe -R nvidia
I get the nvidia-340 package-driver, but if I try to uninstall it, I get:
$sudo apt-get remove nvidia-340 Unable to locate package nvidia-340
--- EDIT 2: ---
Thank you for your help. I managed to uninstall the Nvidia drivers and my systems worked. But when I re-install any driver from the Nvidia my system goes to the same situation after rebooting. Neither solution helped in my situation.
(Sadly I do not have enough point to vote up the answers, that were helpful nevertheless).