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

[Michael Woods]

Updated one server from 20.10 and another from 22.04. Both got this
error independently. Both using X2Go for remote desktop.

Both servers env would show DBUS_SESSION_BUS_ADDRESS as something in
/tmp iirc

Long story short and a lot of rooting around..

added:
DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus"
export DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus"

to the end of:
/etc/X11/Xsession.d/20dbus_xdg-runtime
/etc/X11/Xsession.d/75dbus_dbus-launch
/etc/X11/Xsession.d/95dbus_update-activation-env

Probably not needed in all three files but whatever, it fixes everything...
Probably entirely related to the IF statements in those files not matching correctly to set the env variable.
Not sure if they changed on upgrade and i cbf'd checking but everything was working perfectly before upgrade.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1951491

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

Status in snapd package in Ubuntu:
  Invalid
Status in systemd 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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1951491/+subscriptions