The same happened to me yesterday after a few switches between two accounts. I had this problem, and I had upgraded to gnome-screensaver 2.30.0-0ubuntu2 in a Dell Inspiron 530 a few days ago. Yesterday I had the black sreen.again.
The same happened to me yesterday after a few switches between two accounts. I had this problem, and I had upgraded to gnome-screensaver 2.30.0-0ubuntu2 in a Dell Inspiron 530 a few days ago. Yesterday I had the black sreen.again.