For some reason the unattended upgrades script is very picky about which packages are to be removed. It tries to auto-remove only those packages that have been made redundant by the current set of updates. However, installing a new kernel does not make any previous kernel version redundant automatically - a separate script (/etc/kernel/postinst.d/apt- auto-removal) is run after kernel upgrades that marks all but the two most recent kernels as 'auto-removable'.
I am not sure that the current behaviour can be described as expected or intended - the original author clearly does not trust that what apt thinks is unused (and therefore removable) is unused in reality. He is trying to work around the possibility of having `apt-get auto-remove` break running systems. Really, there should be two changes: Change the documentation for `Remove-Unused-Dependencies`, and adding a switch that will always remove kernels that have been marked as `auto-removable`. For those people that are happy to have `apt-get auto-remove` automatically, there is the `APT::Periodic::AutocleanInterval` variable in /etc/apt/apt.conf.d/10periodic. (Which should really be documented too...) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1267059 Title: "Unattended-Upgrade::Remove-Unused-Dependencies" does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1267059/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
