Bug#455476: Gksu fails to prompt for the password when using the 'sudo mode'

[Joonas Sarajärvi]

Package: gksu
Version: 2.0.0-5

When setting the gconf key /apps/gksu/sudo-mode to false, gksu seems to
not be able to display the password prompt to the user.

Steps to reproduce:

1: $ gconftool -t bool --set /apps/gksu/sudo-mode true
2: $ gksu synaptic

Expected results:

  Gksu should prompt the user, as set in the sudoers file.

Actual results:
  Nothing happens. (almost)
  A button labeled 'Granting rights' in
  Gnome's window list applet.

  'ps aux|grep gksu' shows that gksu is still running, maybe waiting for
  input or trying to grab the screen.

  If I first authenticate myself to sudo so that it still 'remembers'
  me, and doesn't need to prompt for the password,  gksu synaptic works
  fine. If I set /apps/gksu/sudo-mode to false, as it is in the default
  configuration, the normal authentication with the root password works
  fine, too.


My environment:
Running Lenny, with some packages from sid. Versions of packages
depended on by gksu:

gnome-keyring:            2.20.2-1
libatk1.0-0:              1.20.0-1
libc6:                    2.7-3
libcairo2                 1.4.10-1+lenny2
libgconf2-4               2.20.1-1
libgksu2-0                2.0.5-1
libglib2.0-0              2.14.3-1
libgnome-keyring0         2.20.2-1
libgtk2.0-0               2.12.1-1
liborbit2                 1:2.14.7-0.1
libpango1.0-0             1.18.3-1
libstartup-notification0  0.9-1
sudo                      1.6.9p6-1

I am using the proprietary nvidia driver, which I think required me
to upgrade my Xorg to the version in Sid.