It might be this bug.
I haven't used the computer for a week and this happend after I updated my
13.04 installation today. I have had no problem with the Nvidia 314.10 driver
before this.
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*** This bug is a duplicate of bug 576648 ***
https://bugs.launchpad.net/bugs/576648
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 576648, so it is being marked as such. Please look
Just happened on an upgrade from 12.10 to 13.04 on my computer. Unity
does not load, and I'm writing this in a borderless window right now.
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https://bugs.launchpad.net/bugs/1168643
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: nvidia-graphics-drivers-experimental-310 (Ubuntu)
Status: New = Confirmed
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