Number one: KnetworkManager claims "Network Management disabled", no matter what you do in YaST. This had me triple-boot Kubuntu for a few weeks, until Kubuntu had the same problem after a botched hibernation.
This worked on both for me:
Edit /var/lib/NetworkManager/NetworkManager.state Make sure it says NetworkingEnabled=true.
Number two: With the fixed network settings in place, I did a system update including a new kernel. What came up after the boot menu: "File not found ... You need to load kernel first"
Ouch. OK … google … The Kubuntu grub has to be told about SuSE's new kernel. I bang my head on the desk a few times (can't hurt, apparently there's nothing viable in it anyway) and run sudo update-grub in Kubuntu.