I would think the issue is related to the debconf of grub-pc -- Brian, if you still have the test ready to run, try clearing the debconf of grub-pc (or related package) before upgrading the package. Something like:
echo "purge" | sudo -E debconf-communicate grub-pc As a general rule, Update Manager and Ubuntu Software Center have problems when libgtk2-perl isn't installed and debconf needs a frontend. Either the problem is about frozen UI or it's about critical answers or information not being displayed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1457353 Title: Software Updater freezes when trying to upgrade grub-pc package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1457353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
