The screenshot you attached shows you're running the update-manager through packagekit.
You have already filed a bug report (and we are looking into it) for your packagekit problems (bug number 262086). Can you try running the update-manager directly? Then tell us if you get any errors... -- package update-manager 1:0.91.6 failed to install/upgrade: ErrorMessage: SystemError in cache.commit(): E:Sub-process /usr/bin/dpkg returned an error code (1) https://bugs.launchpad.net/bugs/245508 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs