Description of problem:

Because of the bug https://bugzilla.redhat.com/show_bug.cgi?id=796837 I edited out NetworkManager as a manager of my LAN adapters. But as soon as I issue "/etc/init.d/network start" the system will report as calling systemctl and that is it. System will experience instant system freeze. Power reset of the motherboard will not start up the computer (fans are running, but display will remain blank and even the EFI BIOS will not go up). Even the short time powering off the system will not remedy it. 

Version-Release number of selected component (if applicable):

systemd-43-1.fc17.x86_64
systemd-43-1.fc17.i686
kernel 3.3.0-0.rc3.git2.2.fc18.x86_64 
systemd-sysv-43-1.fc17.x86_64

How reproducible:

Always.

Steps to Reproduce:
1. Remove the NetworkManager as a manager of network devices;
2. Issue a "/etc/init.d/network start".
  
Actual results:

Instant system freeze.

Expected results:

No freeze and bringing up of the network devices.

Additional info:

Base Board Information
        Manufacturer: ASRock
        Product Name: A75M-HVS
BIOS Information
        Vendor: American Megatrends Inc.
        Version: P1.60
        Release Date: 10/28/2011
CPU: AMD A6-3500 APU with Radeon(tm) HD Graphics

01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI
Express Gigabit Ethernet controller (rev 06)
02:05.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet
Controller (rev 05)

Also, if to issue "ifconfig" and "route add" commands manually then those network settings are being accepted, interfaces will get running and there is no network issues to report about.