supersu didn't work for me (always failed to patch boot.img) but i found another way to get root. xda is just great.
it's definitely not my work...just used other people's achievements, so all credits go to them!!!
!!! Please, don't blame me if sth goes wrong. It worked for me and my model. Do it on your won risk!
!!! Before you do anything, back up your phone (in TWRP)
so what you need to gain root:
Yoga Book [YB1-X9OL]
working ADB --> e.g. see here
unlocked bootloader --> see here (unlocking the bootloader does a factory reset, so back up your data)
twrp_recovery --> see here (do not flash it, just boot temporarily)
files for root --> see end of post
1. download attached file
2. boot twrp
3. install 1-Magisk-v7.zip
4. install 2-phh-superuser-magisk-r259.zip
6. install 3-Phh Superuser_188.8.131.52.apk
7. install a root checker to verify
got this way from here: https://forum.xda-developers.com/hon...root-t3475854/
more about magisk can be found here (maybe even a newer solution/version): https://forum.xda-developers.com/app...mless-t3473445
files for root: MMroot.zip
You can also use the newest version of Magisk (v.10.2.) to get root, but then follow the following steps:
1. download and install the newest magisk.zip via twrp, phh's superuser is already included, so no need to install it seperately (as with v.7)
2. reboot system
3. install phh's superuser manager from playstore
!!!if you want to update from Magisk v.7., don't do it with magiskmanager cause it will break root.
donwload Magisk's uninstaller.zip (get it here) and install it via twrp before you install v.10.2.