$ SNAPD_DEBUG=1 chromium
2021/12/03 15:21:45.461965 tool_linux.go:204: DEBUG: restarting into "/snap/snapd/current/usr/bin/snap"
2021/12/03 15:21:45.539344 cmd_run.go:425: DEBUG: SELinux not enabled
2021/12/03 15:21:45.540312 tracking.go:45: DEBUG: creating transient scope snap.chromium.chromium
2021/12/03 15:21:45.543273 tracking.go:185: DEBUG: using session bus
2021/12/03 15:21:45.547127 tracking.go:290: DEBUG: StartTransientUnit failed with "org.freedesktop.DBus.Error.Spawn.ChildExited": [Process org.freedesktop.systemd1 exited with status 1]
2021/12/03 15:21:45.547174 cmd_run.go:1187: DEBUG: snapd cannot track the started application
2021/12/03 15:21:45.547199 cmd_run.go:1188: DEBUG: snap refreshes will not be postponed by this process
DEBUG: umask reset, old umask was   02
DEBUG: security tag: snap.chromium.chromium
DEBUG: executable:   /usr/lib/snapd/snap-exec
DEBUG: confinement:  non-classic
DEBUG: base snap:    core18
DEBUG: ruid: 1000, euid: 0, suid: 0
DEBUG: rgid: 1000, egid: 1000, sgid: 1000
DEBUG: apparmor label on snap-confine is: /snap/snapd/14066/usr/lib/snapd/snap-confine
DEBUG: apparmor mode is: enforce
DEBUG: creating lock directory /run/snapd/lock (if missing)
DEBUG: set_effective_identity uid:0 (change: no), gid:0 (change: yes)
DEBUG: opening lock directory /run/snapd/lock
DEBUG: set_effective_identity uid:0 (change: no), gid:1000 (change: yes)
DEBUG: opening lock file: /run/snapd/lock/.lock
DEBUG: set_effective_identity uid:0 (change: no), gid:0 (change: yes)
DEBUG: set_effective_identity uid:0 (change: no), gid:1000 (change: yes)
DEBUG: sanity timeout initialized and set for 30 seconds
DEBUG: acquiring exclusive lock (scope (global), uid 0)
DEBUG: sanity timeout reset and disabled
DEBUG: ensuring that snap mount directory is shared
DEBUG: unsharing snap namespace directory
DEBUG: set_effective_identity uid:0 (change: no), gid:0 (change: yes)
DEBUG: set_effective_identity uid:0 (change: no), gid:1000 (change: yes)
DEBUG: releasing lock 5
DEBUG: opened snap-update-ns executable as file descriptor 5
DEBUG: opened snap-discard-ns executable as file descriptor 6
DEBUG: creating lock directory /run/snapd/lock (if missing)
DEBUG: set_effective_identity uid:0 (change: no), gid:0 (change: yes)
DEBUG: opening lock directory /run/snapd/lock
DEBUG: set_effective_identity uid:0 (change: no), gid:1000 (change: yes)
DEBUG: opening lock file: /run/snapd/lock/chromium.lock
DEBUG: set_effective_identity uid:0 (change: no), gid:0 (change: yes)
DEBUG: set_effective_identity uid:0 (change: no), gid:1000 (change: yes)
DEBUG: sanity timeout initialized and set for 30 seconds
DEBUG: acquiring exclusive lock (scope chromium, uid 0)
DEBUG: sanity timeout reset and disabled
DEBUG: initializing mount namespace: chromium
DEBUG: setting up device cgroup
DEBUG: libudev has current tags support
DEBUG: device /sys/devices/pci0000:00/0000:00:0f.0/drm/card0 has matching current tag
DEBUG: process in cgroup /user.slice/user-1000.slice/session-c1.scope
/user.slice/user-1000.slice/session-c1.scope is not a snap cgroup