Bug#927848: [system-config-printer] Cannot set default printer as normal user

[Andreas Heinlein]

Package: system-config-printer
Version: 1.5.7-3
Severity: normal

--- Please enter the report below this line. ---

We have a setup where all printers are shared by a central CUPS server.
Clients use cups-browsed and DNS-SD to auto-discover them.

Until Debian 8, it was possible for users to use system-config-printer
to select a personal default printer, by right-clicking it an selecting
"Set as default". This worked without having to unlock settings or being
member of the lpadmin group. This was essentially the same as running
"lpoptions -d" on the command line.

With Debian 9, this is not possible anymore. The relevant menu item is
grayed out and only becomes available after unlock, which needs
membership of the lpadmin group. "lpoptions -d" still works, and
system-config-printer even reflects these changes with an emblem on the
default printer.


--- System information. ---
Architecture:
Kernel: Linux 4.19.0-0.bpo.4-amd64

Debian Release: 9.8
900 stable-updates deb.debian.org
900 stable deb.debian.org
500 stretch fai-project.org
500 icinga-stretch packages.icinga.com
100 stretch-backports deb.debian.org

--- Package information. ---
Depends (Version) | Installed
==============================================-+-==============
gir1.2-gdkpixbuf-2.0 | 2.36.5-2+deb9u2
gir1.2-glib-2.0 | 1.50.0-1+b1
gir1.2-gtk-3.0 | 3.22.11-1
gir1.2-notify-0.7 | 0.7.7-2
gir1.2-packagekitglib-1.0 | 1.1.5-2+deb9u1
gir1.2-pango-1.0 | 1.40.5-1
python3-cups (>= 1.9.60) | 1.9.73-1
python3-cupshelpers (= 1.5.7-3) | 1.5.7-3
python3-dbus | 1.2.4-1+b1
python3-gi | 3.22.0-2
system-config-printer-common (= 1.5.7-3) | 1.5.7-3
python3:any (>= 3.3.2-2~) |


Recommends (Version) | Installed
=========================================-+-===========
cups-pk-helper | 0.2.6-1+b1
python3-smbc | 1.0.15.6-1
system-config-printer-udev | 1.5.7-3+b1


Suggests (Version) | Installed
================================-+-==============
gnome-software (>= 3.16.5-2) | 3.22.5-1