------- Comment From kgr...@de.ibm.com 2019-04-12 05:28 EDT-------
I installed Ubuntu 19.04 on my z/VM guest:

root@s8345038:~# uname -a
Linux s8345038 5.0.0-8-generic #9-Ubuntu SMP Tue Mar 12 21:57:17 UTC 2019 s390x 
s390x s390x GNU/Linux
root@s8345038:~# cat /etc/os-release
NAME="Ubuntu"
VERSION="19.04 (Disco Dingo)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu Disco Dingo (development branch)"
VERSION_ID="19.04"
<snip>

I configured a new device:

root@s8345038:~# chzdev -e -a qeth e400
Configuring devices in the active configuration only
QETH device 0.0.e400:0.0.e401:0.0.e402 configured

and its shown in ip a output as expected, with correct name:

root@s8345038:~# ip a
<snip>
3: ence400: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default 
qlen 1000
link/ether 02:a2:2d:00:05:81 brd ff:ff:ff:ff:ff:ff

journalctl -x output shows correct processing order: first qeth, then
systemd:

Apr 12 11:16:17 s8345038 kernel: qeth.e804c4: 0.0.e400: Priority Queueing not 
supported
Apr 12 11:16:17 s8345038 kernel: qdio: 0.0.e402 OSA on SC 12 using AI:1 QEBSM:1 
PRI:1 TDD:1 SIGA: W A
Apr 12 11:16:17 s8345038 systemd-udevd[1312]: Using default interface naming 
scheme 'v240'.
Apr 12 11:16:17 s8345038 systemd-udevd[1312]: link_config: autonegotiation is 
unset or enabled, the speed and duplex are not writable.
Apr 12 11:16:17 s8345038 kernel: qeth.6adf49: 0.0.e400: The device represents a 
Bridge Capable Port
Apr 12 11:16:17 s8345038 kernel: qeth.cc0c57: 0.0.e400: MAC address 
02:a2:2d:00:05:81 successfully registered on device eth0
Apr 12 11:16:17 s8345038 kernel: qeth 0.0.e400 ence400: renamed from eth0
Apr 12 11:16:17 s8345038 kernel: qeth.26d434: 0.0.e400: Device is a OSD Express 
card (level: 0774)
with link type OSD_10GIG.
Apr 12 11:16:17 s8345038 kernel: qeth.f02020: 0.0.e400: QDIO data connection 
isolation is deactivated
Apr 12 11:16:17 s8345038 systemd-networkd[329]: eth0: Interface name change 
detected, eth0 has been renamed to ence400.
Apr 12 11:16:17 s8345038 networkd-dispatcher[660]: WARNING:Unknown index 3 
seen, reloading interface list
Apr 12 11:16:17 s8345038 systemd-udevd[1326]: Using default interface naming 
scheme 'v240'.

So I cannot see this problem here.

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https://bugs.launchpad.net/bugs/1822585

Title:
  OSA/qeth inconsistent interface names

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