[Bug 75230] gdmsetup is not working

[JuliusBloch]

Public bug reported:

Binary package hint: gdm

Hi, I installed edubuntu Herd1 in vmware. If I try to start gdmsetup from the menu or from a terminal gksu is asking for the password but no window open.
Here is the output from the terminal.
testi at edubuntu:~$ gksu gdmsetup --debug
No ask_pass set, using default!
xauth: /tmp/libgksu-XeFjMc/.Xauthority
STARTUP_ID: (null)
cmd[0]: /usr/bin/sudo
cmd[1]: -H
cmd[2]: -S
cmd[3]: -p
cmd[4]: GNOME_SUDO_PASS
cmd[5]: -u
cmd[6]: root
cmd[7]: --
cmd[8]: gdmsetup
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brute force GNOME_SUDO_PASS ended...
No password prompt found; we'll assume we don't need a password.

** Affects: gdm (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

-- 
gdmsetup is not working
https://launchpad.net/bugs/75230