My computer, with Ubuntu 14.04 on it, will only boot to the login screen, after what looks to be a graphical glitch--the screen flashes with red-green-blue stripes and then goes black before the login screen appears.
When I attempt to login another graphics glitch occurs and the login screen appears again.
This started after I began having errors when trying to access the shared documents of another computer on my LAN network--this computer also has Ubuntu 14.04 on it--when I tried to enter, the usual confirmation box popped, on clicking OK, three more confirmation boxes appeared, after closing all of the boxes and restarting the other computer I tried again and had the same problem. I noticed at that point that Ubuntu wanted to update, figuring that this might solve the problem I let it do so, the update completed fine and asked to reboot, so I did and that is when the login glitch started.
I have been unable to login since then, I can however access the harddrive from another Ubuntu 14.04 installed on another harddrive.
I have tried this solution to no avail: https://askubuntu.com/a/223634/391024
I don't know if this is related or not, but for months now, on boot-up a brief terminal message appears with something about the nvidia graphics card, unsure if this is an error message or not.
Thank you for any help!
UPDATE:
After installing a kernel update on another computer it began having the same problem, however on that computer I managed to regain access to it by booting it into the second-newest kernal. It seems there must be a problem with the latest kernel.
On the first computer I tried the same but to no avail.
It seems I have the same or a similar problem as in this question: Can't get past login screen after 14.04 kernel update
