I've tried replicating your setup in a fresh bionic VM (ie. using tmux as default shell which then launches bash) and I can't replicate this:
amurray@sec-bionic-amd64:~$ grep amurray /etc/passwd amurray:x:1000:1000:Ubuntu,,,:/home/amurray:/usr/bin/tmux amurray@sec-bionic-amd64:~$ echo $SHELL /bin/bash amurray@sec-bionic-amd64:~$ cat /etc/tmux.conf set -g default-shell /bin/bash amurray@sec-bionic-amd64:~$ groups amurray adm cdrom sudo dip plugdev lpadmin sambashare This is all from within a graphic gnome-terminal launched after logging into the desktop (see picture which I will attach separately). Can you perhaps try and provide more details on how I could try and replicate this? A couple things to try 1. I've rebuilt polkit-1 with some extra debugging to try and flag when UIDs mismatch - this should end up in the following PPA https://launchpad.net/~alexmurray/+archive/ubuntu/lp1784964 which you could try installing from and seeing if journalctl shows anything? 2. Can you try downgrading polkit-1 and see if that resolves the issue? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1784964 Title: Regression due to CVE-2018-1116 (processes not inheriting user ID or groups ) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/policykit-1/+bug/1784964/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs