This is a development thread, if your question belongs to general topic, please check the General topic

I'm currently working on the device tree and recovery building.
At the moment, CWN and TWRP are partially working but i hope it will improve soon.
Root is available via two methods : with cable improved here (great work guys) or without by using Towelroot

TWRP - seems working

Towelroot v1 (thanks to mrzood for hosting)
Partition infos
Data cable ref : 728141-001 SPS-Micro USB to USB - Mandatory to unlock bootloader and flash custom rom Picture

AOSB 4.2.2 - built on 2014-07-10
CM 10.2 - built on 2014-07-10

HP has released 4.2.2 source code here and mirrored here
My device tree

Notes : (cherry picked in general topic, thanks to authors)
To unlock the bootloader: fastboot -i 0x03F0 oem unlock. WARNING: this will reset your tablet to factory default and loose all your data

Archives :
CWN recovery - booting but partially working
TWRP - booting but partially working
HP Slatebook X2 - Development thread - General topic
HTC One mini M4