Impossible to switch users
This affects both master and gnome-3-28 branches and can be reproduced in various ways...
- Create another user
- Select an user
- Press Escape
- Select another user
- Try to login (fails!)
or
- Create another user
- Login with your user (or the other, as you wish)
- Lock the session -> Switch to other user from lockscreen
- Once back on GDM, select another user... Then you can login and redo what said in 3. or just go back.
- From GDM, again try to unlock the 1st user, it fails.
These errors are triggered:
May 31 09:51:29 bionic-vm gdm3[743]: GdmSession: conversation gdm-password started more than once
May 31 09:51:29 bionic-vm gnome-shell[961]: JS ERROR: Failed to start verification for user: Gio.DBusError: GDBus.Error:org.freedesktop.DBus.Error.Spawn.Failed: Could not create authentication helper process
See downstream bug: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1766137