I recently tried to upgrade/update my graphics drivers in Ubuntu 12.04. Now the screen is all zoomed to a 640 x 480 resolution and I can't figure out how to undo what I did. How can I revert to the old situation?
If it was the nvidia current or current updates driver that was installed, you can remove them with:
respectively. If neither of these packages can be removed then try the following command to install the nouveau driver as I believe it will make it current in any case. To remove a driver other than nvidia-current or nvidia-current-updates we will need to know exactly what it was that you installed.
If you want to make sure the current open source nouveau driver is installed, do
Since you're still having trouble, re-install the current driver then see if you can set a better resolution with nvidia-settings.
then type 'nvidia settings' into the dash and click on the icon it finds. Resolution can be found under the tab 'Xserver Display Configuration' If that works save the settings.
If it doesn't work, then repeat the exercise but install nvidia-current-updates then run nvidia-settings again.
also another option to look into use using the nvidia console and changing the resolution to the proper size for your display, or using Jupiter to change the resolution (Which I have now found to be the quickest option for switching resolutions)
and then from unity launch Jupiter and it will be a small indicator where you can then change resolution and screens.