Comment # 72 on bug 939456 from Matthias Eliasson

This is still a issue for latest Tumbleweed iso (Snapshot20180130).

I used the excellent workaround  Steffen Winterfeldt:

make sure to have usb in and check which device it gets (lsblk)

sudo mksusecd -c tumbleweed.img --fat
openSUSE-Tumbleweed-DVD-x86_64-Snapshot20180130-Media.iso --size /dev/sdx

sudo dd if=tumbleweed.img of=/dev/sdx bs=4M && sync