Lineage 14.1 will not work without the updated firmware that came with the stock marshmallow update, try flashing this firmware-update.zip to see if it will help otherwise you will need to install the twrp flashable stock marshmallow from http://www.modaco.com/forums/topic/378390-smart-ultra-6-rom-601-with-root/ then come back to lineage 14.1
I could have done with this 2 weeks ago when my Nexus 5X bricked itself. Spent a week reading stats, wanted USB C and NFC, also fancied a larger screen but that pushes the price up. Ordered a Wileyfox 2X but the Amazon seller let me down, then picked up a P10 Lite (only in Black sadly) when Argos dropped the price of the 7X, so I swapped the order to that, only to find Argos had the wrong stats and NFC wasn't on it!
So I dropped down to a P8 Lite which was in Honor Blue (only from CPW) and bar the Micro USB was had very similar specs to my dead N5X and was just £130! Maybe I should have waited for the P9 Lite but I glad I didn't plump too much money as I have since found out all Huaweis have a known issue using Bluetooth to Garmin GPS watches.
This week a beta update came out for my Garmin (735XT) and it fixes the issue.