[Bug 2043393] Re: Report.get_logind_session fails to determine session on cgroup2 systems

[Launchpad Bug Tracker]

This bug was fixed in the package apport - 2.28.0-0ubuntu1

---------------
apport (2.28.0-0ubuntu1) noble; urgency=medium

  * New upstream release
    - ui: remove skipping crashes that happened during logout (LP: #2043393)
    - setup: set minimum Java release to 8 (LP: #2045705)
    - support systemd-coredump as core dump handler (LP: #2048136)
  * Drop patches that were applied upstream
  * Address pylint complaints in patches and package hooks
  * Replace build dependency pkg-config by pkgconf
  * Suggest python3-zstandard in python3-problem-report for read support

 -- Benjamin Drung <bdrung at ubuntu.com>  Thu, 22 Feb 2024 15:20:00 +0100

** Changed in: apport (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2043393

Title:
  Report.get_logind_session fails to determine session on cgroup2
  systems

Status in Apport:
  Fix Released
Status in apport package in Ubuntu:
  Fix Released

Bug description:
  Ubuntu >= 22.04 uses only cgroup2 (Ubuntu 20.04 used both and Ubuntu
  18.04 only cgroup version 1). Report.get_logind_session will fail to
  determine the logind session and always return None if only cgroup2 is
  used.

  get_logind_session searches for cgroup lines with "name=systemd:" and
  then extracts the session from "/session-". This worked in Ubuntu
  16.04 but started failing in 18.04.

  Content of /proc/self/cgroup when printed from a terminal inside a
  Ubuntu desktop session:

  Ubuntu 16.04 (xenial)
  ---------------------

  ```
  12:cpuset:/
  11:perf_event:/
  10:pids:/user.slice/user-1000.slice
  9:blkio:/
  8:hugetlb:/
  7:net_cls,net_prio:/
  6:cpu,cpuacct:/
  5:devices:/user.slice
  4:freezer:/
  3:rdma:/
  2:memory:/
  1:name=systemd:/user.slice/user-1000.slice/session-c1.scope
  ```

  Ubuntu 18.04 (bionic)
  ---------------------

  ```
  12:freezer:/
  11:net_cls,net_prio:/
  10:memory:/
  9:rdma:/
  8:cpu,cpuacct:/
  7:devices:/user.slice
  6:perf_event:/
  5:cpuset:/
  4:pids:/user.slice/user-1000.slice/user at 1000.service
  3:hugetlb:/
  2:blkio:/
  1:name=systemd:/user.slice/user-1000.slice/user at 1000.service/gnome-terminal-server.service
  0::/user.slice/user-1000.slice/user at 1000.service/gnome-terminal-server.service
  ```

  Ubuntu 20.04 (focal)
  ---------------------

  ```
  13:memory:/user.slice/user-1000.slice/user at 1000.service
  12:perf_event:/
  11:misc:/
  10:pids:/user.slice/user-1000.slice/user at 1000.service
  9:hugetlb:/
  8:cpuset:/
  7:blkio:/
  6:devices:/user.slice
  5:cpu,cpuacct:/
  4:freezer:/
  3:rdma:/
  2:net_cls,net_prio:/
  1:name=systemd:/user.slice/user-1000.slice/user at 1000.service/apps.slice/apps-org.gnome.Terminal.slice/vte-spawn-ad936f4d-0d62-4ac4-bbd8-0e766d8a3b1f.scope
  0::/user.slice/user-1000.slice/user at 1000.service/apps.slice/apps-org.gnome.Terminal.slice/vte-spawn-ad936f4d-0d62-4ac4-bbd8-0e766d8a3b1f.scope
  ```

  Ubuntu 22.04 (jammy)
  ---------------------

  ```
  0::/user.slice/user-1000.slice/user at 1000.service/app.slice/app-org.gnome.Terminal.slice/vte-spawn-0c3f8b02-b112-4cab-accc-764cbb223bac.scope
  ```

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