weston-launch 1.2.2: could not open tty0: Permission denied

[christophe.jarry at ouvaton.org]

>     weston-launch: could not open tty0: Permission denied

Ok, I forgot to do, as root:

    chown root /usr/bin/weston-launch
    chmod +s /usr/bin/weston-launch

Now when I run weston-launch as a normal user, member of the weston-launch group, I obtain the
following error message:

    failed to start pam transaction: 26: Critical error - immediate abort

Christophe