Comment # 15 on bug 1157394 from Russell Sandish

Just tried a zypper dup. Machine is now running Tumbleweed 20191128.
Yast2-network is 4.2.28. The problem is still outstanding, I cannot configure
the network through Yast. The file /etc/sysconfig/network/ifcfg-wlp2s0 appears
to be being updated correctly by yast2. Configuring using wicked using a
previously saved wicked configuration no longer works - the network interface
is just left in a down state. Since the wicked configuration file format is
undocumented AFAICT, it is possible that the configuration format changed, and
that my saved version is no longer recognisable by wicked.

The only thing I can do is continue to use NetworkManager, which does work,
however I have problems setting a static IP number using that technique, which
I'd much rather do.