Comment 0 for bug 1686393

Availability
============
Co-maintained with Debian GNOME. Built for all supported architectures.

Changes from Debian:
Update to 3.24
+ README.Debian: update for correct paths in Ubuntu
+ control.in:
  - Don't recommend desktop-base
  - Depend on bash for ubuntu_config_error_dialog.patch
+ rules:
  - Don't override default user/group
  - --enable-gdm-xsession to install upstream Xsession script
  - override dh_installinit with --no-start to avoid session being killed
+ rules, README.Debian, gdm3.8.pod:
  Use upstream custom.conf instead of daemon.conf
+ gdm3.{postinst,postrm}: rename user and group back to gdm
+ gdm3.postinst: don't kill gdm on upgrade
+ gdm3.*.pam: Make pam_env read ~/.pam_environment (LP: #952185)
+ gdm3.install:
  - Stop installing default.desktop. It adds unnecessary clutter
    ("System Default") to the session chooser.
  - Don't install debian/Xsession
+ ubuntu_run_xsession.d.patch
+ ubuntu_upstart_event.patch:
  - Emit upstart events
+ ubuntu_xresources_is_a_dir.patch
  - Fix loading from /etc/X11/Xresources/*
+ ubuntu_nvidia_prime.patch:
  - Add hook to run prime-offload (as root) and prime-switch if
    nvidia-prime is installed (LP: #1262068)
+ revert_override_LANG_with_accountservices.patch:
  - On Ubuntu accountservices only stores the language and not the
    full locale as needed by LANG.
+ ubuntu_config_error_dialog.patch:
  - Show warning dialog in case of error in ~/.profile etc. and
    don't let a syntax error make the login fail (LP: #678421).
+ 09_default_session.patch:
  - Dropped, all the other Ubuntu flavors use LightDM and it only takes a
    gsettings override to set a different default session

Rationale
=========
gnome-shell (MIR LP: #1685870) depends on gir1.2-gdm-1.0 (which depends on libgdm1). gnome-shell currently will not run if that dependency is not installed.

Robert Ancell was talking with the GDM developer Ray Strode about the possibility of GNOME switching to LightDM. So ask Robert about the status of that.

Security
========
https://security-tracker.debian.org/tracker/source-package/gdm3

There is one open CVE, but I think this is a common bug with Linux lock screens:
https://security-tracker.debian.org/tracker/CVE-2016-1000002

Quality assurance
=================
- Please subscribe Ubuntu Desktop Bugs to this package.

https://bugs.launchpad.net/ubuntu/+source/gdm3
https://bugs.debian.org/cgi-bin/pkgreport.cgi?src=gdm3
https://bugzilla.gnome.org/buglist.cgi?quicksearch=product%3A"gdm"

No tests.

Dependencies
============
All binary dependencies should be in main already. See Background information.

Standards compliance
====================
3.9.8

Maintenance
===========
- Actively developed upstream
https://git.gnome.org/browse/gdm

https://code.launchpad.net/~ubuntu-desktop/gdm/ubuntu

Debian packaging uses svn, but we're hoping to convert to git this year (which will allow for Ubuntu branches):
https://sources.debian.net/src/gdm3/unstable/debian/

Background information
======================
At this time, we don't need the gdm3 binary promoted to main. The gdm3 binary depends on gnome-session (source in main, binary in universe) and recommends xserver-xephyr (source in main, binary in universe).