With a filesystem declared in fstab with the options: noauto,x-systemd.automount,x-systemd.idle-timeout=1min Follow these steps 1) access filesystem 2) wait for timeout 3) observe filesystem is unmounted 4) observe filesystem is remounted (unexpected) steps 2 to 4 then repeat continuously upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=781867 fix is committed upstream: https://git.gnome.org/browse/glib/commit/?h=glib-2-50&id=c54f6e81a2acc7ce43a4cd14d44428f4119e5a8f and included in glib-2.52.3 (in the tree).
2.52.3 is stable by now, so I guess we can consider this OBSOLETE now instead