Failed unmounting /run/snapd/ns.

Here's the transcript:

```
$ journalctl --boot -2 -p3
-- Journal begins at Tue 2021-08-17 05:39:33 EEST, ends at Sun 2021-11-07 02:25:47 EET. --
Nov 07 02:09:33 suppilovahvero kernel: PM: suspend_common(): xhci_pci_suspend+0x0/0x140 [xhci_pci] returns -110
Nov 07 02:09:33 suppilovahvero kernel: xhci_hcd 0000:39:00.0: can't suspend (hcd_pci_runtime_suspend returned -110)
Nov 07 02:09:33 suppilovahvero kernel:
Nov 07 02:09:41 suppilovahvero gdm-password][2283]: gkr-pam: unable to locate daemon control file
Nov 07 02:09:43 suppilovahvero systemd[2302]: Failed to start Application launched by gnome-session-binary.
Nov 07 02:09:46 suppilovahvero gdm-launch-environment][1309]: GLib-GObject: g_object_unref: assertion 'G_IS_OBJECT (obj>
Nov 07 02:09:59 suppilovahvero pulseaudio[2311]: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Faile>
Nov 07 02:10:08 suppilovahvero systemd[1]: Failed to start Process error reports when automatic reporting is enabled.
Nov 07 02:21:34 suppilovahvero gdm3[1264]: Gdm: Failed to contact accountsservice: Error calling StartServiceByName for>
Nov 07 02:21:38 suppilovahvero systemd-cryptsetup[12650]: Device nvme0n1p3_crypt is still in use.
Nov 07 02:21:38 suppilovahvero systemd-cryptsetup[12650]: Failed to deactivate: Device or resource busy
Nov 07 02:21:39 suppilovahvero systemd[1]: Failed unmounting /run/snapd/ns.
```

I get the "Failed unmounting /run/snapd/ns" every single boot after I updated to Ubuntu 21.10. Other warnings are just for reference.

Also, after updating to 21.10, I get message about missing "hwmatch", but maybe these are not related.