I just changed my power settings so that my laptop would hibernate when I closed the lid… but now KDE Network Manager has decided that it will not allow itself to be enabled.
I can get my ethernet connection working through YAST… but I really need the wireless to work as well… so can somebody please tell me why KNM is being so stupid, and how I can fix it? 
EDIT: I just realized that I should have put this in the Network subforum… can someone please move this thread for me? Thanks!
This is an ‘old’ problem that still seems to haunt many. You might want to read this old blog, which details the basic approach to adding hooks to restart the network again after hibernating etc. You could adjust for your hardware. Be aware that some of the power management file locations have changed a bit. You may have to google for more info on this.
A couple of useful references:
I tried manually restarting the haldaemon, to see if that would fix it… but it did not, so I tried restarting the network daemon, and this is what I got:
jwesleycooper@linux-twom:/etc/init.d> sudo ./network restart
root's password:
Shutting down the NetworkManager done
Shutting down network interfaces:
eth0 device: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
eth0 done
wlan0 device: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
No configuration found for wlan0
Nevertheless the interface will be shut down.
wlan0 done
Shutting down service network . . . . . . . . . done
Starting the NetworkManager done
Connecting............... 1s
waiting
It would seem to me that the drivers must also be restarted… how would I go about doing that?
Have a look at this file and see if NetworkingEnabled=false
/var/lib/NetworkManager/NetworkManager.state
That did it! All I had to do was change NetworkingEnabled=false to NetworkingEnabled=true , thanks Ski_K2! 
changed value for true
Thanks a lot !!! it worked for me too!!!
my hole network was dead meat, including ifup. No interface working, no wireless
no ethernet cable. First Knetworkmanager gave up “networking disabled”, then ifup via yast few days later.