You seem to have some unsupported experimental graphic drivers installed
from a third party PPA and those packages are breaking your update.
Judging from the information you provided, you've used
ppa:oibaf/graphics-drivers in the past. If that's the case, please open
terminal and follow these steps to remove those packages from your machine:
1) Install ppa-purge: sudo apt-get install ppa-purge
2) Add graphics-drivers ppa: sudo add-apt-repository ppa:oibaf/graphics-drivers
3) Update package index: sudo apt-get update
4) Purge the PPA: sudo ppa-purge ppa:oibaf/graphics-drivers
Finally restart your computer and see if the upgrade is still failing.
** Changed in: update-manager (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1101708
Title:
do-release-upgrade aborts due to unresolvable "broken" packages
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