Thanks Etienne, this is a bit surprising! Do I understand correctly, that on the slower machine (where you are seeing this bug) you will not be able to start firefox until you have run that apparmor_parser command? Not even if you try starting firefox well after the login?
It's strange, because your logs show that the apparmor.service unit was started can you please also attach the output of these commands: sudo systemctl status apparmor sudo journalctl -b _SYSTEMD_UNIT=apparmor.service + SYSLOG_IDENTIFIER=audit And then also this (make sure you haven't previously started firefox in this boot): SNAPD_DEBUG=1 firefox And after that, let's have a look at the full system log (I have no clear idea what to look for, actually, but maybe I'll spot something suspicious): sudo journalctl -b -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871148 Title: services start before apparmor profiles are loaded To manage notifications about this bug go to: https://bugs.launchpad.net/apparmor/+bug/1871148/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs