[Bug 1742804] Re: Failed to add PIDs to scope's control group

[Peter Eszlari]

I tested it again with the regular Gnome-based Ubuntu desktop, and it
exhibits the same bug, so i changed the title accordingly. It seems
there is no connection to the flatpak problem.

** Summary changed:

- Kubuntu: Failed to add PIDs to scope's control group
+ Failed to add PIDs to scope's control group

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Title:
  Failed to add PIDs to scope's control group

Status in systemd package in Ubuntu:
  New

Bug description:
  When I launch applications with flatpak, "journalctl -f" shows the
  following:

  Jan 11 22:44:13 localhost systemd[1244]: flatpak-org.kde.krita-8134.scope: Failed to add PIDs to scope's control group: Permission denied
  Jan 11 22:44:13 localhost systemd[1244]: Failed to start flatpak-org.kde.krita-8134.scope.
  Jan 11 22:44:13 localhost systemd[1244]: flatpak-org.kde.krita-8134.scope: Unit entered failed state.

  I explicitly mentioned "Kubuntu" in the summary, because I experience
  this only under Kubuntu (17.10 and 18.04), NOT under the regular
  Gnome-based Ubuntu Desktop (17.10). At first this error message seemed
  harmless, because it looked like it had no effect. But now I noticed
  that with certain flatpak apps, the file open dialog would not pop up.
  And I too experienced this only under Kubuntu, not Ubuntu or Fedora
  (all tested). So there might be a connection.

  I first reported this to flatpak:

  https://github.com/flatpak/flatpak/issues/1216

  There it was suggested to try the following command:

  $ systemd-run --user --scope echo hello
  Job for run-r150c7437bf8a4c5e919acbbc3de0b29c.scope failed.
  See "systemctl status run-r150c7437bf8a4c5e919acbbc3de0b29c.scope" and "journalctl -xe" for details.

  ...and this one also fails.

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