I have ubuntu 14.04.1 64bit installed with intel and nvidia video cards .
I'm using xorg-edgers ppa to graphics drivers .
Today i got an update for the drivers (i think it was the mesa drivers) .
when restarting I got the error in this thread Error
I clicked ok and in the next screen i choose : "reconfigure graphics" .
after that rebooting to ubuntu doesn't even reach the lightdm screen and i get black screen with the white coursor in the top left screen , and stays like that .
I tried almost all of the answers in the link above , but didn't help .
More info :
1 - When i choose failsafe x from the recovery menu i get the output :
(EE) fatal server error :
(EE) no screens found
(EE) please contact the xorg foundation .....
after a couple of seconds it returns to the recovey menu .
2 - in one of the answers they talked about /etc/lightdm/lightdm.conf file , which i couldn't even find .
What could be the problem ?