Oneplus 3 nethunter install boots to black screen - how to debug and build?

Initially it wouldn't even install and say it couldn't mount data as rw, but then I read that people were more successful using an older version of twrp and that did the trick.

I followed the newest installation instructions and installed lineage-17.1-20201221-nightly-oneplus3 followed by magisk.
I tried installing Disable_Dm-Verity_ForceEncrypt before and after (after repeating the whole process) installing nethunter.

After a successful installation message, booting would only result in a black screen.
This appears to be a common problem as it's been discussed twice:
https://forums.kali.org/showthread.p...lus-3T-Los17-1
https://forums.kali.org/showthread.p...on-OnePlus-3-T

In both threads Thiviyan posted a link to a google drive of a working kernal to install over top of the base installation.
I tried this and it was successful, however I would like to build it myself.

I tried the build script like so:

Code:

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./build.py --ten --device oneplus3-any

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and this build also resulted in a black screen.

So I then started mucking with the flags and tried

Code:

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--nightly --forcedown

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and also tried

Code:

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--rootfs full

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and

Code:

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--rootfs minimal

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Alas, all builds failed to get beyond a black screen.

It seems that it's something to do with the source kernel but I wouldn't know where to start.
Can anyone point me in the right direction? I'd like to know how to build a working version myself.

Thank you.

cool cool.