The dpkg frontend starting earlier takes the lock until it is finished. 20.04's unattended-upgrades is much faster, BTW.
Unattended-upgrades gracefully stops when it gets the TERM signal, thus it can be asked to quit, but I think it is not needed in 20.04 because u-u became fast enough in typical cases. ** Changed in: unattended-upgrades (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883338 Title: unattended-upgrades blocks apt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1883338/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs