Reviewing the files from your upgrade attempt you seem to have enabled
the Oibaf PPA (https://launchpad.net/~oibaf/+archive/graphics-drivers) .
This will prevent the upgrade as that PPA contains different versions of
packages essential to Ubuntu. Please revert to the official Xorg
packages and try
Thank you for finding that. I'll remove that PPA and try again.
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https://bugs.launchpad.net/bugs/1309335
Title:
ubuntu gnome 13.10 fails to upgrade to 14.04
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