Thanks for the logs.
Could you please replace xorg from xorg-edgers by the version from the
official archive before upgrade. network-manager-trunk, kubuntu PPAs may
also hold back essential package and prevent the upgrade.
You can install ppa-purge to help you in reinstalling official packages.
Thanks for taking the time to report this bug and helping to make Ubuntu
better. Could you please add the log files from '/var/log/dist-upgrade/'
to this bug report as separate attachments? Thanks in advance.
** Changed in: update-manager (Ubuntu)
Status: New = Incomplete
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** Attachment added: apt.log
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/773008/+attachment/2096696/+files/apt.log
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https://bugs.launchpad.net/bugs/773008
Title:
** Attachment added: apt-clone_system_state.tar.gz
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/773008/+attachment/2096700/+files/apt-clone_system_state.tar.gz
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** Attachment added: lspci.txt
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/773008/+attachment/2096701/+files/lspci.txt
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https://bugs.launchpad.net/bugs/773008
** Attachment added: system_state.tar.gz
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/773008/+attachment/2096702/+files/system_state.tar.gz
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The full /var/log/dist-upgrade.
** Attachment added: dist-upgrade.tar.gz
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/773008/+attachment/2096703/+files/dist-upgrade.tar.gz
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