I've been running Ubuntu 12.04 LTS on my PC for about 2 months (I had Lubuntu earlier on). It's been doing fine until the last update on Saturday. The first time I switched it on after the update (on Sunday) the screen was all black with only 2 lines in the top left-hand corner - they looked like this:
'Ubuntu 12.04 LTS my username-desktop tty1
my username-desktop login:
When I put my login and password in I got a message:
Welcome to Ubuntu 12.04 LTS (GMU/Linux 3.2.0-45-generic i686)
I've switched it off and on 3 times with the same result. As I didn't have a clue what's happening I re-installed Ubuntu from a CD. The 1st time after re-installation it switched on fine, but the 2nd time - the same problem occurred.
I kept switching in off and on and eventually the normal login screen appeared. It was fine throughout Monday and Tuesday and Wednesday morning - and suddenly, when switching it on on Wednesday evening - the same black screen. So I switched it off and on twice and on the 3rd attempt it was normal.
Can anybody tell me what this means?
I've tried to find info on the Net and found something about X window (or server?) not working properly or problems with Ubuntu desktop. I thought I have the normal Ubuntu desktop installed, but I'm not sure of anything anymore.
I'll be grateful for any help.