If haven't done so, and if you still have the xorg-edgers ppa installed you need to remove it:
sudo apt-get install ppa-purge
sudo ppa-purge
the upgrade should then run smoothly.
After its done, if can't get into the desktop or if you only can run low graphics mode, then you should follow the steps on askUbuntu
My bad,
If haven't done so, and if you still have the xorg-edgers ppa installed you need to remove it:
sudo apt-get install ppa-purge
sudo ppa-purge
the upgrade should then run smoothly.
After its done, if can't get into the desktop or if you only can run low graphics mode, then you should follow the steps on askUbuntu