Rooting again after installing LineageOS?

Question

After following the following steps:

• rooting a motorola g3,
• installing TWRP
• wiping the phone (without micro-sd present) with TWRP
• installing lineageOS
• wiping the phone (without micro-sd present) with TWRP
• Installing SlimOS
• wiping the phone (without micro-sd present) with TWRP
• Installing LineageOS
• Installing Root checker basic
• Finding it does not have proper root acces
• Rebooting to fastboot>recovery>TWRP>Install
• Installing http://forum.xda-developers.com/attachment.php?attachmentid=3655401&d=1456122222 (as linked specifically for the Moto G 3 2015 generation here: https://motog5.net/unlock-bootloader-install-twrp-root-moto-g3/)*
• Rebooting,
• checking Root checker basic
• Finding it does not have proper root access
• Noticing this explanation: https://duckduckgo.com/?q=root+lineage&atb=v119-6&iax=videos&ia=videos&iai=L8rwPV5ZhhA
• enabling in debugging mode:
• Root access for ADB and All apps
• checking Root checker basic
• Finding it does not have proper root access
• Reboot in fastmode>TWRP>Install the supersu file
• Reboot check in Root check basic whether root has been obtained, root has not been obtained.
• Root access for ADB and All apps
• checking Root checker basic
• Finding it does not have proper root access
• Reboot in fastmode>TWRP>Install the supersu file
• It does not give a red error bar but it reads:

Boot image patcher

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• Finding boot image --- Boot image:/ /dev/block/mmcblk0p31
• Extracting ramdisk
• Decrompressing ramdisk
• Checking Patch status
• Creating Backup
• Patching sepolicy --- Failure, aborting

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Important notice

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If TWRP offers to install SuperSU do NOT Let it!

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I thought perhaps the supersu file needs to be changed since now it is for a LineageOS in stead of for the MOTO G3 2015 edition stock android, so I tried the following 3 files as well:

From: https://www.lineageosrom.com/2016/12/how-to-enable-root-in-lineage-os-using.html TO: https://www.lineageosrom.com/2017/01/download-supersuzp-and-su-removalzip.html To: https://download.lineageos.org/extras

1. https://mirrorbits.lineageos.org/su/addonsu-15.1-arm-signed.zip
2. https://mirrorbits.lineageos.org/su/addonsu-15.1-arm64-signed.zip
3. https://mirrorbits.lineageos.org/su/addonsu-15.1-x86-signed.zip

Only the 3d did not give a red error.

So as much of a trivial challenge it may appear to be, I was curious if anyone can point out which mistake I am making in trying to give the device root-access again. Other suggestions are welcome as well!

*Note, this was also the file that allowed me to root it the first time.

Answer 1

As you've already found out, LineageOS has its own, built-in, lightweight SU solution (addonsu), which is the only one supported officially (the team does not adore Magisk/SuperSU).

Note that officially LOS only provides 14.1 builds for your device. Assuming that's the version you're running, using the addonsu for 15.1 you will naturally bump into problems. As indicated in the source, your device is an arm one, so use addonsu-14.1-arm-signed.zip instead.

Magisk/SuperSU are reported by other users to work well enough, but you will need newer packages that work with higher Android versions, and the one you initially used (SuperSU 2.62) isn't enough.

Answer 2

It seems that you had Lineage (im on 14.1 right now & i love this rom), but you wanted, instead, the excitement, unreliability, the Wonder, of 3rd-party root management.
Yeah, I used to smoke a lotta that, too. JK. CM/LOS's su is way more stable, predictable, user-friendly, and PRIVATE than most other root-solutions. Seems you weren't aware of the add-on at first, but in the future, Google everything about your device before flashing every file that comes in a zip-format. Knowing your architecture is kinda a big deal in the root/modding communities (im curious how the x86 add-on was the least error-throwing on your arm device). You're lucky that root access was the only issue you were fighting. I can laugh at you because I've been there, done that. You did right by asking, though. Live and learn.