I have tried this: Can't login after AMD catalyst driver installation with no success.
Although I cannot login into my guest account either. Either way when I try to login the screen goes black and returns to the login screen.
I was trying to use this as a guide.
When I try to run sudo startx I get an error along the lines of:
startx no gl es2.0 capable screen found
with a stacktrace.
Also I am getting
initctl event failed when I do ctrl-alt-f1 in recovery mode.
sudo apt-get upgrade, now I can sort of login into guest (It won't return to login page, but only mouse shows and nothing happens on click.)
EDIT1: tried reinstalling xorg, now I can login, although it says:
could not apply the stored configuration for monitors ubuntu 13.10 with some information about the screen dimensions and the screen remains black.
EDIT2: unpluged a monitor now it just has a popup about a system error, but still just black screen and mouse.