I've run into this bug today as well. The workflow was: Firefox (via snap) was working as expected, I ran Virtualbox, the OOM killer terminated my open Firefox and Librewolf (via apt/dpkg) instances, finished using the VM, went to open back up Firefox and Librewolf. Librewolf opened back up as normal, but Firefox won't launch. When running `firefox` in the terminal, I get this output:
`/user.slice/user-1000.slice/session-1239.scope is not a snap cgroup` At no point was I logged out of my session. The output of `snap list` shows my system has the youtube-dl snap installed, and now running that gives the same error on launch as above. Interestingly, the `codium` snap does not have this issue, and launches normally as expected. I see some mention of VNC in the conversation above; my `xtightvncviewer` functionality is not affected by any of this. Also mentioned above seems to be comments about login being "done by their remote access tool": I'm affected by this bug and am not using any form of a remote access tool for logging in. Login/display manager appears to be SDDM. I'm using the Lubuntu flavor of Ubuntu, customized with WindowMaker installed as the window manager. Display server is X11. This issue occurred in an active session, where after login programs were functional for multiple days, and during the session suddenly the error appeared. I don't get any new log output from `journalctl --user` after running `firefox`. My system info and command outputs: ``` tom@tom:~$ uptime 13:01:35 up 20 days, 13:55, 22 users, load average: 0.63, 0.81, 0.81 tom@tom:~$ lsb_release -a; uname -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.5 LTS Release: 22.04 Codename: jammy Linux tom 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux tom@tom:~$ echo $DBUS_SESSION_BUS_ADDRESS unix:path=/run/user/1000/bus tom@tom:~$ ls -l /run/user/1000/bus srw-rw-rw- 1 tom tom 0 Oct 9 10:58 /run/user/1000/bus tom@tom:~$ systemctl --user Failed to connect to bus: Connection refused tom@tom:~$ systemd --user Failed to create /user.slice/user-1000.slice/session-1239.scope/init.scope control group: Permission denied Failed to allocate manager object: Permission denied ``` Happy to provide other command outputs or full logs at request, hope this helps to further document this bug. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, 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 X2Go: New Status in Xpra Terminal Server: New Status in snapd package in Ubuntu: Incomplete Status in systemd package in Ubuntu: Invalid Status in x2goserver package in Ubuntu: Incomplete 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) To manage notifications about this bug go to: https://bugs.launchpad.net/x2go/+bug/1951491/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
