Bug#934067:

[Michael Biebl]

Hi Balint

On Tue, 6 Aug 2019 18:48:59 +0200 Balint Reczey
<balint.reczey at canonical.com> wrote:
> 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
> 

I guess that would be https://github.com/systemd/systemd/issues/13272

I'm not sure yet if that is a regression in systemd, a failure in the
autopkgtest or the way gdm uses aliases.

In any case, please add your feedback to the upstream bug report (I
guess the fact that gdm3.service is a symlink is relevant here)
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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