I too have a very similar error. Only when I attempt to launch firefox remotely by SSH I get this:
/system.slice/ssh.service is not a snap cgroup And this when I attempt launch firefox directly on my target computer: WARNING: cannot start document portal: Expected portal at "/run/user/1000/doc", got "/home/stephen/.cache/doc" /system.slice/sddm.service is not a snap cgroup So I edited the three files as recommended by Michael Woods (woodsy) in c44. The result is the target computer boots a dark, blank, monitor screen. Fortunately the OS was nevertheless accessible by SSH, and so I was able to restore the three files, and after doing so, I rebooted and got the expected screen displays. I am not sure I edited those three files correctly, so I attached those edited files to this posting for your review. I also included in the attachment the output from the command: SNAPD_DEBUG=1 snap run firefox I would deeply appreciate any help with this. It is a new computer, and a new Ubuntu installation of mine. ** Attachment added: "Jira 1951491 Attachment 2022-07-13.zip" https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1951491/+attachment/5603023/+files/Jira%201951491%20Attachment%202022-07-13.zip -- 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 snapd package in Ubuntu: Invalid Status in systemd package in Ubuntu: Confirmed 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) 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 : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
