Success! After a lot of searching around using the information from apt- cache, I wasn't able to find much more information but the versioning that was present in the logs. The closest lead I found was a dead xorg- testing repository which was inactive and relied on xorg-edgers. Trying to add and then ppa-purge it didn't work because it no longer seemed to have a manifest. However, I was able to manually apt-get install --reinstall the whole set, and found that only xserver-xorg-video-tdfx and xserver-xorg-video-vmware were being provided from other locations. I allowed those to reinstall and then tried apt-get remove on the rest, which showed that there were no unexpected or potentially dangerous dependencies beyond the usual danger of mucking with xorg. Removing them worked and the upgrade is now proceeding smoothly. Thanks again for the diagnostic advice!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1247656 Title: Fails to calculate upgrade setting software channels with custom ppas purged To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1247656/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
