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

[Robbert Korving]

So I had this same issue on two machines that are running Ubuntu 22.04.4
LTS Desktop with more or less the same software installed.

I run `sudo apt update && sudo apt full-upgrade -y && sudo apt
autoremove -y && sudo apt autoclean && sudo apt clean && sudo snap
refresh` when I haven't been on any machine for a few days. I execute
that command in the terminal app right after I start my desktop session.

After that command firefox does not start. Slack shows a window for a
brief second and then disappears. After a few re-clicks on the program
in the start menu they both start again. While slack does completely
exit a few times after it started, after 3 to 5 times it recovers and
starts acting like it normally does.

Errors I see related to cgroup:
```
systemd[29657]: app-gnome-gnome\x2dkeyring\x2dsecrets-29897.scope: Couldn't move process 29897 to requested cgroup '/user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-gnome\x2dkeyring\x2dsecrets-29897.scope': No such process

systemd[29657]: app-gnome-xdg\x2duser\x2ddirs-29906.scope: Couldn't move
process 29906 to requested cgroup
'/user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-
xdg\x2duser\x2ddirs-29906.scope': No such process


snap-store_ubuntu-software.desktop[36055]: /user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-snap\x2dstore_ubuntu\x2dsoftware-36055.scope is not a snap cgroup

firefox_firefox.desktop[45624]:
/user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-
firefox_firefox-45624.scope is not a snap cgroup

firefox_firefox.desktop[45982]:
/user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-
firefox_firefox-45982.scope is not a snap cgroup

slack_slack.desktop[60312]: /user.slice/user-1000.slice/user at 1000.service/app.slice/app-gnome-slack_slack-60312.scope is not a snap cgroup
```

I have a hunch that something is in a wrong state after `sudo snap
refresh` maybe in combination with the updates installed by `sudo apt
full-upgrade`.

Let me know which kind of logs you like me to share.

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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:
  Incomplete
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)

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