[Bug 1951491] Re: Can't run snaps: .slice/session-1.scope is not a snap cgroup

[Nicholas Dietz]

This happened to me on a fresh install of Xubuntu 22.04 when using X2Go.
Local sessions don't have this problem. I can work around it by setting
the environment variable (as specified in message 31)
DBUS_SESSION_BUS_ADDRESS before running firefox.

I'd like to get this fixed as we use X2go extensively at my office, and
we'll be stuck on Ubuntu 20.04 until this is fixed. It sounds like a new
x2go (bug) integration issue starting with 22.04.

Tim Richardson is probably right that X2go is not doing something the
way systemd expects, and that therefore x2go is 'old'. Is there a 'new'
remote access tool that is known to work?

I rather like x2go and would love to port the 'new' solution to x2go if
I knew what exactly needed to be done.

I looked here for information about what the right way to do this, but
it's not clear from that page where to go for the steps I need:
https://www.freedesktop.org/software/systemd/man/systemd-
logind.service.html

I also looked in the the source for x2go:
https://code.x2go.org/releases/source/
But I have yet to find the code responsible for this bug or any clue about what it should be changed to.

I also find related bug reports dating back many years, but it's just clues, not a clear explanation of what's being done 'the old way' and what the new way should look like:
https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1046

I'm looking for a bug report for this bug on the x2go side, but I can't
find one. Does anyone know if one is open, or should I open a fresh one?

The closest related bug report I could find was this:
https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=814

Once I have a proper bug report found/opened, if anyone with a slightly
deeper knowledge of how to fix this could give me some clues of where to
look or what to fix, that would be great.

** Bug watch added: bugs.x2go.org/ #1046
   http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1046

** Bug watch added: bugs.x2go.org/ #814
   http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=814

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https://bugs.launchpad.net/bugs/1951491

Title:
  Can't run snaps: .slice/session-1.scope is not a snap cgroup

Status in X2Go:
  New
Status in snapd package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Incomplete
Status in x2goserver package in Ubuntu:
  Confirmed
Status in snapd package in Debian:
  New

Bug description:
  I just upgraded from hirsute to impish using do-release-upgrade. On
  the upgraded system, I can't run either firefox or chromium (both of
  which worked fine under hirsute). Both fail with:

  /user.slice/user-NNN.slice/session-1.scope is not a snap cgroup where
  NNN is my uid

  With firefox, I was able to fix the problem with:

  snap remove --purge firefox
  apt purge firefox
  apt install firefox

  Now firefox works. But I tried the same thing substituting chromium-
  browser for firefox, and it didn't help: chromium fails with the same
  error message.

  I guess there must be something left over from the hirsute version of
  snapd that isn't getting noticed or cleared by the impish version?

  Someone suggested this might be related to bug 1850667, but that bug
  is marked fixed as of a couple months ago, and I just did this upgrade
  today. Also, it doesn't mention the error message I'm seeing.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.10
  Package: snapd 2.53+21.10ubuntu1
  ProcVersionSignature: Ubuntu 5.13.0-21.21-generic 5.13.18
  Uname: Linux 5.13.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu71
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Thu Nov 18 18:12:45 2021
  InstallationDate: Installed on 2020-04-29 (568 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  SourcePackage: snapd
  UpgradeStatus: Upgraded to impish on 2021-11-18 (0 days ago)

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