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

[Andy Ruddock]

I'm using VNC to access a desktop and experiencing just this issue. Using the "export DBUS_SESSION_BUS_ADDRESS" allows me to get a firefox window. I can't open file load/save dialogs from that session though, so can't import/export certificates & websites with file upload pages that use the standard file-picker dialog don't work.
 
To be fair though I'm fed up of being told that it's my configuration that must be wrong & I should be applying one of many random environment variable settings that I may find on the internet. If firefox works in, say, an xfce session by default & everything works, but it doesn't work in a similar session over VNC then something in the distro configuration is broken - simple as.

I've better things to do than try to apply workarounds to fix broken
systems, so I'll use a distro that works. It seems that the team at
Ubuntu is simply not ready to fully support the myriad ways of using
desktop linux.

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

Status in X2Go:
  New
Status in Xpra Terminal Server:
  New
Status in snapd package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Incomplete
Status in x2goserver package in Ubuntu:
  Confirmed
Status in snapd package in Debian:
  New
Status in snapd package in Fedora:
  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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