I patched PackageKit from Matthias's upstream commits, and it works as expected now. Attached said patch, will also attach debdiff.
** Patch added: "Patch containing fix" https://bugs.launchpad.net/ubuntu/+source/packagekit/+bug/1961837/+attachment/5562850/+files/9422895d4ee53aa31e775ced5d8bda1d7be23df3.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1961837 Title: PackageKit 1.2.5 unable to perform upgrades To manage notifications about this bug go to: https://bugs.launchpad.net/packagekit/+bug/1961837/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs