Just installed Ubuntu 22.04 here, and I get this error while trying to run a firefox instance for an user which is not the one who logged into X. Here's the full command trace to reproduce the error, typed in a gnome-terminal session:
me@mypc:~$ sudo adduser www
[sudo] password for me:
Adding user `www' ...
Adding new group `www' (1002) ...
Adding new user `www' (1002) with group `www' ...
Creating home directory `/home/www' ...
Copying files from `/etc/skel' ...
New password:
BAD PASSWORD: The password is a palindrome
Retype new password:
passwd: password updated successfully
Changing the user information for www
Enter the new value, or press ENTER for the default
Full Name []:
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n]
me@mypc:~$ xhost +
access control disabled, clients can connect from any host
me@mypc su - www
Password:
www@mypc:~$ export DISPLAY=:1
www@mypc:~$ firefox
/user.slice/user-1000.slice/[email protected]/app.slice/app-org.gnome.Terminal.slice/vte-spawn-00e5cd03-e354-4ba8-aca7-2245c0e8b1cb.scope is not a snap cgroup
www@mypc:~$
Note that 1000 is the uid of the user me.
Note that if switch to console with ctrl+f3, log in with user www and run DISPLAY=:1 firefox, than the browser correctly opens in display 1. So there must be something related to the terminal.
