Trying to boot rescue mode from Tumbleweed snapshot,gives me:
[ TIME ] Timed out waiting for device dev-hvc0.device.
[DEPEND] Dependency failed for Serial Getty on hvc0.
[  OK  ] Reached target Login Prompts.
[  OK  ] Started /etc/init.d/after.local Compatibility.
         Starting /etc/init.d/after.local Compatibility...
[FAILED] Failed to start System Logging Service.
See "systemctl status syslogd.service" for details.
[DEPEND] Dependency failed for System Kernel Logging Service.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.