Let's root our Max Lumi

**I am not responsible for any damage to your device. Please take care of your actions.**
Steps to install:
[1] Current firmware version is 3.0. My Max Lumi came with it. Attached bootimage is for version 3.0.
[2] Download and install Magisk Manager on Max Lumi.
[3] Do you have installed adb and fastboot on your computer?
[4] Enable usb debugging on your Max Lumi, plug it into your computer, and run in command line to check connection.
adb devices
[5] start a bootloader session
adb reboot bootloader
[5] The bootloader of Max Lumi is unlocked. You can check it with:
fastboot flashing unlock
[6] flash patched bootimage
fastboot flash boot your_patched_boot.img
Then your Max Lumi reboots by itself
[7] Start Magisk Manager and you use "direct install" method to root permanently.
Sample terminal session:

C:\Users\Leo\Desktop\Max Lumi>adb devices
List of devices attached
e3b2a8ed        device
C:\Users\Leo\Desktop\Max Lumi>adb reboot bootloader
C:\Users\Leo\Desktop\Max Lumi>fastboot flashing unlock
FAILED (remote:        Device already : unlocked!)
finished. total time: 0.004s
C:\Users\Leo\Desktop\Max Lumi>fastboot boot Max_Lumi_v3.0.Magisk.21.2.boot.img
downloading 'boot.img'...
OKAY [  0.276s]
OKAY [  0.002s]
finished. total time: 0.301s
C:\Users\Leo\Desktop\Max Lumi>

It's a non standard installation of Magisk, because Max Lumi has a bootimage without ramdisk but loads this ramdisk when it is patched to bootimage.
decrypt Boox Update Upx, to get a bootimage of firmware update.
#1 Magisk Manager on rooted Max Lumi
#2 & #3 Magisk Direct Install
Attached Thumbnails Max Lumi rooted - Makisk Manager and AdAway.png
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ID:	184734   Magisk Direct Install 01.png
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ID:	184735   Magisk Direct Install 02.png
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ID:	184736   Attached Files zip Max_Lumi_v3.0.Magisk.21.2.boot.img.zip (11.65 MB)

Tags: Books, Onyx Boox, Magisk, Max Lumi, Boox Update Upx

Source:  https://www.mobileread.com/forums/showthread.php?t=336523&goto=newpost

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