When I restarting my laptop with WiFi and autofs mounted samba share I’m having reboot stucks on
"A stop job is running for automount system on demand" for 3 minutes
After that again some stop job but with the full path to me share mount location for 2 minutes.
Seems issue is related to a problem that network connection is down when umounting starting for this share.

Below journalctl extraction for NetworkManager, autofs and dbus services for the last reboot.

Aug 30 01:07:18 DzirT-LT dbus[443]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Aug 30 01:07:18 DzirT-LT dbus[443]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Aug 30 01:07:48 DzirT-LT NetworkManager[449]: <info>  [1504044468.4174] connectivity: (wlp2s0) timed out
Aug 30 01:07:48 DzirT-LT NetworkManager[449]: <info>  [1504044468.4175] manager: NetworkManager state is now CONNECTED_GLOBAL
Aug 30 01:07:48 DzirT-LT dbus[443]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Aug 30 01:07:48 DzirT-LT dbus[443]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Aug 30 01:07:51 DzirT-LT dbus[443]: [system] Activating via systemd: service name='org.freedesktop.PolicyKit1' unit='polkit.service'
Aug 30 01:07:51 DzirT-LT dbus[443]: [system] Activation via systemd failed for unit 'polkit.service': Refusing activation, D-Bus is shutting down.
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <info>  [1504044471.4788] device (wlp2s0): state change: activated -> deactivating (reason 'connection-removed', internal state 'managed')
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <info>  [1504044471.4790] manager: NetworkManager state is now DISCONNECTING
Aug 30 01:07:51 DzirT-LT dbus[443]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Aug 30 01:07:51 DzirT-LT dbus[443]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.nm-dispatcher.service': Refusing activation, D-Bus is shutting down.
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <warn>  [1504044471.4828] error requesting auth for org.freedesktop.NetworkManager.wifi.share.protected: Authorization check failed: Refusing act
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <warn>  [1504044471.4828] error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: Authorization check failed: Refusing activati
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <info>  [1504044471.4832] device (wlp2s0): state change: deactivating -> disconnected (reason 'connection-removed', internal state 'managed')
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <info>  [1504044471.4834] dhcp4 (wlp2s0): canceled DHCP transaction
Aug 30 01:07:51 DzirT-LT NetworkManager[449]: <info>  [1504044471.4834] dhcp4 (wlp2s0): state changed bound -> done
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <info>  [1504044472.0093] device (wlp2s0): set-hw-addr: set MAC address to EA:0F:C3:C7:5B:08 (scanning)
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <info>  [1504044472.0111] dns-mgr: Removing DNS information from /usr/bin/resolvconf
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <info>  [1504044472.0437] manager: NetworkManager state is now DISCONNECTED
Aug 30 01:07:52 DzirT-LT dbus[443]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Aug 30 01:07:52 DzirT-LT dbus[443]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.nm-dispatcher.service': Refusing activation, D-Bus is shutting down.
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <warn>  [1504044472.0444] sup-iface[0x919e04fe80,wlp2s0]: connection disconnected (reason -3)
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <info>  [1504044472.0445] device (wlp2s0): supplicant interface state: completed -> disconnected
Aug 30 01:07:52 DzirT-LT systemd[1]: Stopping Automounts filesystems on demand...
Aug 30 01:07:52 DzirT-LT NetworkManager[449]: <info>  [1504044472.3435] ModemManager disappeared from bus
Aug 30 01:08:41 DzirT-LT systemd[1]: Stopped Automounts filesystems on demand.
Aug 30 01:09:41 DzirT-LT systemd[1]: Stopping Network Manager...
Aug 30 01:09:41 DzirT-LT NetworkManager[449]: <info>  [1504044581.6996] caught SIGTERM, shutting down normally.
Aug 30 01:09:41 DzirT-LT NetworkManager[449]: <info>  [1504044581.7011] device (wlp2s0): state change: disconnected -> unmanaged (reason 'unmanaged', internal state 'managed')
Aug 30 01:09:42 DzirT-LT NetworkManager[449]: <info>  [1504044582.2569] device (wlp2s0): set-hw-addr: reset MAC address to 44:1C:A8:E2:F2:03 (unmanage)
Aug 30 01:09:42 DzirT-LT NetworkManager[449]: <info>  [1504044582.2666] dns-mgr: Removing DNS information from /usr/bin/resolvconf
Aug 30 01:09:42 DzirT-LT NetworkManager[449]: No resolv.conf for interface NetworkManager
Aug 30 01:09:42 DzirT-LT NetworkManager[449]: <warn>  [1504044582.2762] dns-mgr: could not commit DNS changes on shutdown: /usr/bin/resolvconf returned error code
Aug 30 01:09:42 DzirT-LT NetworkManager[449]: <info>  [1504044582.2762] exiting (success)
Aug 30 01:09:42 DzirT-LT systemd[1]: Stopped Network Manager.
Aug 30 01:09:42 DzirT-LT systemd[1]: Stopping D-Bus System Message Bus...
Aug 30 01:09:42 DzirT-LT systemd[1]: Stopped D-Bus System Message Bus.