TWRP 3.0.3 with decyption support!
Your warranty is probably void. Do we care?
HOW-TO ROOT YOUR MATE 9/P9/Honor 8
Phh su r275 version and flash
Download and install Material phh apk: Release post
MTP auto mount on boot fixed!
Data unmount after few seconds fixed.
Mounting Loop Devices (Kernel doesn't support this)
Credits: TWRP (Team win Recovery Project)
@BadWolfYe for giving info on how he got MTP working.
Stable: Sort OF