Bug#934067:

[Balint Reczey]

Package: gdm3
Version: debian/3.12.1-1
Severity: important

Dear Maintainers,

Gdm3 package symlinks gdm3.service -> gdm.service but the next systemd
release will really dislike it and will mark services as failed:

test at test-Standard-PC-i440FX-PIIX-1996:~$ service gdm3 status
● gdm.service - GNOME Display Manager
   Loaded: error (Reason: Unit gdm.service failed to load properly:
File exists.)
   Active: inactive (dead)

aug 06 18:12:37 test-Standard-PC-i440FX-PIIX-1996 systemd[1]:
gdm.service: Two services allocated for the same bus name
org.gnome.DisplayManager, refusing operation.
test at test-Standard-PC-i440FX-PIIX-1996:~$ service gdm status
● gdm.service - GNOME Display Manager
   Loaded: error (Reason: Unit gdm.service failed to load properly:
File exists.)
   Active: inactive (dead)

aug 06 18:14:59 test-Standard-PC-i440FX-PIIX-1996 systemd[1]:
gdm.service: Two services allocated for the same bus name
org.gnome.DisplayManager, refusing operation.

This can already be observed with the systemd version in Ubuntu eoan-proposed.

Luckily GDM starts and lets users to log in, but the service is marked
as dead. This breaks systemd autopkgtest:

...
test_udev (__main__.ServicesTest) ... ok

======================================================================
ERROR: test_gdm3 (__main__.ServicesTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/autopkgtest.bVYr80/build.F0n/src/debian/tests/boot-and-services",
line 72, in test_gdm3
    self.active_unit('gdm3')
  File "/tmp/autopkgtest.bVYr80/build.F0n/src/debian/tests/boot-and-services",
line 183, in active_unit
    out = subprocess.check_output(['systemctl', 'status', unit])
  File "/usr/lib/python3.7/subprocess.py", line 395, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.7/subprocess.py", line 487, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['systemctl', 'status',
'gdm3']' returned non-zero exit status 3.

----------------------------------------------------------------------
Ran 23 tests in 9.748s

FAILED (errors=1, skipped=2)
autopkgtest [04:15:47]: test boot-and-services: -----------------------]
boot-and-services    FAIL non-zero exit status 1

Please fix the issue to let next systemd pass autopkgtest.

Cheers,
Balint

-- 
Balint Reczey
Ubuntu & Debian Developer