Bug#1043443: libgtk-3-0: Missing print backend for lpr

[Ralf Schlatterbeck]

Package: libgtk-3-0
Version: 3.24.37-2
Severity: important

libgtk-3-0 used to ship the following print backends in debian buster
and debian bullseye:

libprintbackend-cloudprint.so
libprintbackend-cups.so
libprintbackend-file.so
libprintbackend-lpr.so
libprintbackend-test.so

By default only cups and file were enabled.

Debian bookworm only ships

libprintbackend-cups.so
libprintbackend-file.so

probably due to the bug-report
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1025271

Please re-enable the other print backends in the next build.
If some undesired backends are available by default, this can be
configured in the file
/etc/gtk-3.0/settings.ini

The stanza there should look like (for previous debian defaults):

[Settings]
gtk-print-backends=file,cups

So the correct fix for #1025271 is to leave all print backends enabled
and add a debian-provided config-file with the enabled backends unless
there is another way to set a default config in recent gtk.

The current state of affairs makes debian bookworm unuseable for people
with other print backends like lpr. This is needed, e.g., for the
debian-provided lprng package. It is also needed for printers that
support the lpr protocol natively.

Note: I've searched if the other backends are available in another
package now, this does not seem to be the case.


-- System Information:
Debian Release: 12.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-10-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libgtk-3-0 depends on:
ii  adwaita-icon-theme   43-1
ii  hicolor-icon-theme   0.17-2
ii  libatk-bridge2.0-0   2.46.0-5
ii  libatk1.0-0          2.46.0-5
ii  libc6                2.36-9+deb12u1
ii  libcairo-gobject2    1.16.0-7
ii  libcairo2            1.16.0-7
ii  libcolord2           1.4.6-2.2
ii  libcups2             2.4.2-3+deb12u1
ii  libepoxy0            1.5.10-1
ii  libfontconfig1       2.14.1-4
ii  libfribidi0          1.0.8-2.1
ii  libgdk-pixbuf-2.0-0  2.42.10+dfsg-1+b1
ii  libglib2.0-0         2.74.6-2
ii  libgtk-3-common      3.24.37-2
ii  libharfbuzz0b        6.0.0+dfsg-3
ii  libpango-1.0-0       1.50.12+ds-1
ii  libpangocairo-1.0-0  1.50.12+ds-1
ii  libpangoft2-1.0-0    1.50.12+ds-1
ii  libwayland-client0   1.21.0-1
ii  libwayland-cursor0   1.21.0-1
ii  libwayland-egl1      1.21.0-1
ii  libx11-6             2:1.8.4-2+deb12u1
ii  libxcomposite1       1:0.4.5-1
ii  libxcursor1          1:1.2.1-1
ii  libxdamage1          1:1.1.6-1
ii  libxext6             2:1.3.4-1+b1
ii  libxfixes3           1:6.0.0-2
ii  libxi6               2:1.8-1+b1
ii  libxinerama1         2:1.1.4-3
ii  libxkbcommon0        1.5.0-1
ii  libxrandr2           2:1.5.2-2+b1
ii  shared-mime-info     2.2-1

Versions of packages libgtk-3-0 recommends:
ii  libgtk-3-bin     3.24.37-2
ii  librsvg2-common  2.54.5+dfsg-1

Versions of packages libgtk-3-0 suggests:
ii  gvfs  1.50.3-1

Versions of packages libgtk-3-0 is related to:
pn  appmenu-gtk3-module       <none>
pn  fcitx-frontend-gtk3       <none>
pn  gcin-gtk3-immodule        <none>
pn  gtk-vector-screenshot     <none>
pn  gtk3-engines-xfce         <none>
pn  gtk3-im-libthai           <none>
pn  hime-gtk3-immodule        <none>
pn  ibus-gtk3                 <none>
pn  imhangul-gtk3             <none>
ii  libcanberra-gtk3-module   0.30-10
pn  libcaribou-gtk3-module    <none>
pn  libgtk3-nocsd0            <none>
pn  maliit-inputcontext-gtk3  <none>
pn  packagekit-gtk3-module    <none>
pn  scim-gtk-immodule         <none>
pn  topmenu-gtk3              <none>
pn  uim-gtk3                  <none>
pn  uim-gtk3-immodule         <none>

-- no debconf information