I wrote a post a month or so ago about getting a black screen with a blinking cursor in the upper left corner. While that specific situation has occurred at least once since it is happens to all be tied together.
Currently I have a working display in Ubuntu 13.10 but with a default profile. I have no idea what happened to my old profile. I must have deleted it or it was corrupted. I don’t know the answer. I do know that I have wasted a lot of time on video driver issues.
I have tried so many things that I can’t even begin to tell you what I have or have not tried. Basically my video system on my ubuntu 13.10 server became hosed after a regular update by Ubuntu. Since then it seems to work but not all the time. All I can do is hope that the new 14.04 or whatever the latest LTS release is can fix my issues. I don’t want to start from scratch again.