Some clues: If I start Ubuntu 22 with kernel argument `systemd.unit=multi- user.target` (i.e. non-graphical) then start Wayland with `XDG_SESSION_TYPE=wayland dbus-run-session gnome-session` then DBUS_SESSION_BUS_ADDRESS gets set to something like "DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus- mcSf5L11K8,guid=b86aac9a59f39dddad072fc86546c3f8" and the Firefox snap errors with "/user.slice/user-1000.slice/session-1.scope is not a snap cgroup".
But Firefox launched with `DBUS_SESSION_BUS_ADDRESS="unix:path=$XDG_RUNTIME_DIR/bus" firefox` from a Terminal will run. Note that DBUS_SESSION_BUS_ADDRESS is already set in the non-graphical shell before starting the Wayland session. It is overriden by dbus-run- session (as documented in the man page). I don't understand these systems, but it would seem to me that the Firefox snap is assuming that it's being run from a top-level session. If a Wayland is started by a user with dbus-run-session then it can't talk to it because it's assuming the top level D-bus. This might also be a clue as to why things don't work for remote sessions. Perhaps snaps assume (indirectly) that they're only being run in a top-level local session. A "standard session" if you like. Incidentally, the Firefox is happy if I use `startx` to get a session. -- 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: 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) 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
