Comment 6 for bug 2023598

Thanks for reporting this issue.

Security updates aren't intended to be installed manually, and that is not a scenario that is tested when we publish them. Doing a full "apt upgrade" is the recommended way to install security updates.

That being said, not being able to login after manually installing packages definitely isn't an ideal scenario, and we will certainly look into tightening the dependencies to make sure this no longer happens.