I installed openSUSE-Tumbleweed-ARM-JeOS-raspberrypi3.aarch64-Current.raw.xz on
a microSD card and tried to start it on a Raspberry Pi 3B+ (newest model). The
Pi does not boot, it hangs on the color screen.

Also tried the Leap version,
openSUSE-Leap42.3-ARM-JeOS-raspberrypi3.aarch64-2017.07.26-Build1.1.raw.xz,
with the same result.

Raspbian (NOOBS) is working, latest version has 'Raspberry Pi 3B+ support
added' in the change log. I think the solution had something to do with a
firmware update.

Please add Raspberry Pi 3B+ support in Tumbleweed and Leap.