Bug#971647: lightdm-gtk-greeter: ignores system default theme

[Matt Beary <mfbeary@gmail.com>]

Package: lightdm-gtk-greeter
Version: 2.0.6-1
Severity: normal

Dear Maintainer,

lightdm-gtk-greeter currently ignores the system default themes, due to a hardcoding of Adwaita in /usr/share/lightdm/lightdm-gtk-greeter.conf.d/01_debian.conf.
This can be seen in the source here: https://salsa.debian.org/xfce-extras-team/lightdm-gtk-greeter/-/blob/debian/master/debian/01_debian.conf#L6

removing this line causes the defaults set in /etc/gtk-3.0 to be used as expected

-- System Information:
Debian Release: 10.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-11-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lightdm-gtk-greeter depends on:
ii  libc6                   2.28-10
ii  libcairo2               1.16.0-4
ii  libgdk-pixbuf2.0-0      2.38.1+dfsg-1
ii  libglib2.0-0            2.58.3-2+deb10u2
ii  libgtk-3-0              3.24.5-1
ii  libindicator3-7         0.5.0-4
ii  liblightdm-gobject-1-0  1.26.0-4
ii  libx11-6                2:1.6.7-1+deb10u1

Versions of packages lightdm-gtk-greeter recommends:
ii  adwaita-icon-theme  3.30.1-1
ii  desktop-base        10.0.2
ii  gnome-themes-extra  3.28-1
ii  policykit-1         0.105-25

lightdm-gtk-greeter suggests no packages.

-- Configuration Files:
/etc/lightdm/lightdm-gtk-greeter.conf changed [not included]

-- no debconf information