[Bug 1790478] Re: gdm3 in cosmic fails to start fully in autopkgtest

[Daniel van Vugt]

Try gdm version 3.29.92, which has a fix for some rather serious issues:

https://bugs.launchpad.net/ubuntu/+source/gdm3/+bugs?field.tag=fixed-in-
gdm-3.29.92

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https://bugs.launchpad.net/bugs/1790478

Title:
  gdm3 in cosmic fails to start fully in autopkgtest

Status in gdm3 package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  In systemd package for a while, there is a boot-and-services test
  case, which tries to install common/typical things and ensure they
  continue to operate with new systemd.

  One of the test cases is gdm3. The test case dependencies are:

  Tests: boot-and-services
  Depends: systemd-sysv,
    systemd,
    udev,
    systemd-container,
    systemd-coredump,
    libpam-systemd,
    xserver-xorg-video-dummy,
    xserver-xorg,
    gdm3 [!s390x],
    cron,
    network-manager,
    busybox-static,
    apparmor,
    pkg-config,
    python3

  The test does following:
  out = subprocess.check_output(['ps', 'u', '-C', 'gdm-x-session'])                                                                                  
  self.assertIn(b'gdm-x-session gnome-session', out)                                                                                                 
  out = subprocess.check_output(['ps', 'u', '-C', 'Xorg'])                                                                                           
  self.assertIn(b'Xorg vt1', out)                                                                                                                    
  self.active_unit('gdm')

  However, this now errors out upon the first command, meaning gdm-x-session is not running anymore.
  On bionic, this test case continues to operate correctly in the autopkgtest cloud.

  test_gdm3 (__main__.ServicesTest) ... ERROR

  ======================================================================
  ERROR: test_gdm3 (__main__.ServicesTest)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/tmp/autopkgtest.RNx2A1/build.2Wy/src/debian/tests/boot-and-services", line 66, in test_gdm3
      out = subprocess.check_output(['ps', 'u', '-C', 'gdm-x-session'])
    File "/usr/lib/python3.6/subprocess.py", line 336, in check_output
      **kwargs).stdout
    File "/usr/lib/python3.6/subprocess.py", line 418, in run
      output=stdout, stderr=stderr)
  subprocess.CalledProcessError: Command '['ps', 'u', '-C', 'gdm-x-session']' returned non-zero exit status 1.

  ----------------------------------------------------------------------
  Ran 24 tests in 18.974s

  FAILED (errors=1)

  From http://autopkgtest.ubuntu.com/packages/systemd/cosmic/i386

  Thus it looks like there is a regression or a change of behavior of
  gdm3 in the cloud in cosmic; since bionic continues to work correctly.

  I will mark this test as an expected failure for now, and monitor it
  separately, as currently, this is blocking many migrations.

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