For quite a while now I've been unable to use TDEsu to open utilities that
require root access, e.g. TDM configuration.  TDEsu freezes after I enter the
root password and press Enter.
	When I run it from the command line I see

> tdesu: WARNING: Daemon not safe (not sgid), not using it.

	Looking at /opt/trinity/bin/tdesud, I saw that indeed, it was not sgid, so I
set that bit; but it still hangs, albeit without the message.
	I see that there are four programs associated with this function:

> -rwxr-xr-x 1 root root 59912 2019-03-18 15:53:08 /opt/trinity/bin/tdesu
> -rwxr-xr-x 1 root root 14544 2019-03-18 15:37:31 /opt/trinity/bin/tdesu_stub
> -rwxr-sr-x 1 root root 55440 2019-03-18 15:53:08 /opt/trinity/bin/tdesud
> -rwxr-xr-x 1 root root 72200 2019-03-19 15:10:26 /opt/trinity/bin/tdesudo

	Should other bits be set for one or more of these?  Is there a missing entry
in /etc/group?  What else should I look for?
	N.B. I have tried reinstalling the package containing TDEsu, but that hasn't
helped.

Leslie