Thank you for posting this (and anyone else who might have already before, I haven't had time to read the full thread).

I managed to recover from a bootloop using the [edited] steps 1-5 to find the interface name for my Jolla. OpenSUSE 13.1 uses systemd which issues unique interface names, so my Jolla had an interface name of enp4s0u1

Then Step 6.
sudo /sbin/ifconfig enp4s0u1 192.168.2.14 netmask 255.255.255.0 up
telnet 192.168.2.15

allowed me to choose option 5 to use the btrfs recovery option.