I was expecting S905W2 to be similar to S905X2 (G12A) but actually this is an S4 device so there is no usable support in the upstream kernel at this time. Some patches have started to dribble in but LE will not be supporting them anytime soon. I believe CE have been working on S4 with their vendor-kernel based fork - best to look there.
yep, is S4, thanks for your time to check the logs.