Bug#888480: gnome-shell: authentication dialog does not allow selecting the admin user

[Kyle Robbertze]

Package: gnome-shell
Version: 3.26.2-4
Severity: normal

Dear Maintainer,

When there are multiple admininstrator users (set-up using Gnome
Settings -> Users) who are in the sudo group, the authentication dialog
that prompts for superuser access only displays the option to
authenticate as the first admin user.

Steps to reproduce:
1. On a clean sid install, create two aditional users in GNOME settings.
One user should be an Administrator, while the other should be a
Standard user. Set their passwords when creating the account.
2. Reboot and log on as the standard user
3. Try install software from GNOME Software. The authentication dialog
will only show the original user for authentication

I expected some clear way to change the user I wish to authenticate as
so that I could authenticate as any admin user.

I have not changed the default polkit config and so all users in the
sudo group are admin users in polkit's eyes. Verifying using groups
indicates that both admin users are in the sudo group.


-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-3-amd64 (SMP w/1 CPU core)
Locale: LANG=en_ZA.UTF-8, LC_CTYPE=en_ZA.UTF-8 (charmap=UTF-8), LANGUAGE=en_ZA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-shell depends on:
ii  caribou                                      0.4.21-4
ii  dconf-gsettings-backend [gsettings-backend]  0.26.1-3
ii  evolution-data-server                        3.26.3-4
ii  gir1.2-accountsservice-1.0                   0.6.45-1
ii  gir1.2-atspi-2.0                             2.26.2-2
ii  gir1.2-caribou-1.0                           0.4.21-4
ii  gir1.2-freedesktop                           1.54.1-4
ii  gir1.2-gcr-3                                 3.20.0-6
ii  gir1.2-gdesktopenums-3.0                     3.24.1-2
ii  gir1.2-gdm-1.0                               3.26.2.1-3
ii  gir1.2-geoclue-2.0                           2.4.7-1
ii  gir1.2-glib-2.0                              1.54.1-4
ii  gir1.2-gnomebluetooth-1.0                    3.26.1-2
ii  gir1.2-gnomedesktop-3.0                      3.26.2-4
ii  gir1.2-gtk-3.0                               3.22.26-2
ii  gir1.2-gweather-3.0                          3.26.1-2
ii  gir1.2-ibus-1.0                              1.5.17-3
ii  gir1.2-mutter-1                              3.26.2-1
ii  gir1.2-nm-1.0                                1.10.2-4
ii  gir1.2-nma-1.0                               1.8.10-2
ii  gir1.2-pango-1.0                             1.40.14-1
ii  gir1.2-polkit-1.0                            0.105-18
ii  gir1.2-rsvg-2.0                              2.40.20-2
ii  gir1.2-soup-2.4                              2.60.3-1
ii  gir1.2-upowerglib-1.0                        0.99.7-1
ii  gjs                                          1.50.3-1
ii  gnome-backgrounds                            3.26.2-2
ii  gnome-settings-daemon                        3.26.2-1
ii  gnome-shell-common                           3.26.2-4
ii  gsettings-desktop-schemas                    3.24.1-2
ii  libasound2                                   1.1.3-5
ii  libatk-bridge2.0-0                           2.26.1-1
ii  libatk1.0-0                                  2.26.1-3
ii  libc6                                        2.26-5
ii  libcairo2                                    1.15.8-3
ii  libcanberra-gtk3-0                           0.30-6
ii  libcanberra0                                 0.30-6
ii  libcroco3                                    0.6.12-2
ii  libecal-1.2-19                               3.26.3-4
ii  libedataserver-1.2-22                        3.26.3-4
ii  libgcr-base-3-1                              3.20.0-6
ii  libgdk-pixbuf2.0-0                           2.36.11-1
ii  libgirepository-1.0-1                        1.54.1-4
ii  libgjs0g [libgjs0-libmozjs-52-0]             1.50.3-1
ii  libglib2.0-0                                 2.54.3-2
ii  libglib2.0-bin                               2.54.3-2
ii  libgstreamer1.0-0                            1.12.4-1
ii  libgtk-3-0                                   3.22.26-2
ii  libical3                                     3.0.1-5
ii  libjson-glib-1.0-0                           1.4.2-3
ii  libmutter-1-0                                3.26.2-1
ii  libnm0                                       1.10.2-4
ii  libpango-1.0-0                               1.40.14-1
ii  libpangocairo-1.0-0                          1.40.14-1
ii  libpolkit-agent-1-0                          0.105-18
ii  libpolkit-gobject-1-0                        0.105-18
ii  libpulse-mainloop-glib0                      11.1-4
ii  libpulse0                                    11.1-4
ii  libsecret-1-0                                0.18.5-5
ii  libstartup-notification0                     0.12-5
ii  libsystemd0                                  236-3+b1
ii  libx11-6                                     2:1.6.4-3
ii  libxfixes3                                   1:5.0.3-1
ii  mutter                                       3.26.2-1
ii  python3                                      3.6.4-1

Versions of packages gnome-shell recommends:
ii  chrome-gnome-shell    9-2
ii  gdm3                  3.26.2.1-3
ii  gkbd-capplet          3.26.0-2
ii  gnome-control-center  1:3.26.2-1
ii  gnome-user-docs       3.26.2.1-1
ii  iio-sensor-proxy      2.2-1
ii  switcheroo-control    1.2-1
ii  unzip                 6.0-21

Versions of packages gnome-shell suggests:
ii  gir1.2-telepathyglib-0.12   0.24.1-1.1
ii  gir1.2-telepathylogger-0.2  0.8.2-2

-- no debconf information