I note that you've reported this bug from a machine running Ubuntu 15.04. Ubuntu 15.04 has recently switched to use systemd as its default init system, which means it will not use mountall at boot. You may want to check whether this problem exists when booting with systemd instead of upstart, and if so, to file a separate bug report against the systemd package.
I note that you've reported this bug from a machine running Ubuntu 15.04. Ubuntu 15.04 has recently switched to use systemd as its default init system, which means it will not use mountall at boot. You may want to check whether this problem exists when booting with systemd instead of upstart, and if so, to file a separate bug report against the systemd package.