Description:

I recently recently switched my three Arch Linux machines to systemd. All three machines mount an NFS drive (/media/data) within my LAN on startup. Two of the machines are notebooks. That's why I use NetworkManager to manage network access. The third machine is a desktop. On this machine I use netcfg for networking.

At shutdown, I get on both notebooks the following race condition:

[** ] A stop job is running for /media/dataNetworkManager[1716]: <error> [1371362286.799529] [nm-dbus-manager.c:278] nm_dbus_manager_init_dbus(): Could not get the system bus.
Make sure the message bus daemon is running! Message: failed to connect to socket /run/dbus/system_bus_socket: Verbindungsaufbau abgelehnt

("Verbindungsaufbau abgelehnt" means "connection refused".)

I get hundreds of the same error messages, only the number in brackets [] changes, with the "[*** ]" at the beginning of each line in red. It seems that some processes can't handle the unmounting of the NFS drive properly and run into a race condition.

This error appeared first when I switched to systemd and is 100% reproducible.

When I unmount the drive /media/data manually before shutdown, the shutdown is flawless.

On the desktop where I use netcfg instead of NetworkManager, the shutdown is also flawlees, with mounted NFS drive.

Thus it seems that the shutdown procedure of NetworkManager is buggy.


Additional info:
The machines are up-to-date (June 16):

extra/network-manager-applet 0.9.8.2-1 [installed]
extra/networkmanager 0.9.8.2-1 [installed]
community/networkmanager-dispatcher-netfs 1.0-2 [installed]
core/systemd 204-3 [installed]
core/systemd-sysvcompat 204-3 (base) [installed]
core/nfs-utils 1.2.8-6 [installed]


Steps to reproduce:

Connect to a network via NetworkManager and mount a NFS drive. Try to shutdown the machine w/o unmounting the NFS drive first.