I have concluded that this problem only appears if the -proposed package has never been installed AND cupsd is running.
So, the way to reproduce this is:
- Do a clean Ubuntu install
- Install updates
- Enable -proposed
- Make sure that cupsd is running
- Update cups-daemon.
When I do this, the CUPS service gets in a weird state in which it can't be successfully stopped with systemctl nor invoke-rc.d. I have tried reloading systemd configuration, stopping and disabling cups.path, but the only thing that I have used with success to make the init system function again is to manually run "killall cupsd".
I have concluded that this problem only appears if the -proposed package has never been installed AND cupsd is running.
So, the way to reproduce this is:
- Do a clean Ubuntu install
- Install updates
- Enable -proposed
- Make sure that cupsd is running
- Update cups-daemon.
When I do this, the CUPS service gets in a weird state in which it can't be successfully stopped with systemctl nor invoke-rc.d. I have tried reloading systemd configuration, stopping and disabling cups.path, but the only thing that I have used with success to make the init system function again is to manually run "killall cupsd".