Phone bricked after installing LinageOS 17.1 - System UI Crashing

[Bart80TR]

Hi,
Today I tried to install LinageOS 17.1 on my Huawei P10 lite (at start, still completely Stock Rom).
Unlocked bootloader following procedure in https://forum.xda-developers.com/p10-lite/how-to/p10-lite-bootloader-unlock-june-2020-t4113315, worked great.
Installed TWRP following https://forum.xda-developers.com/p10-lite/development/recovery-twrp-huawei-p10-lite-t3953890 ; also here, no problem.
Then I tried installing LinageOS following this thread https://forum.xda-developers.com/p10-lite/development/rom-lineageos-17-1-huawei-p10-lite-t4064115 . Here I ended up with the Linage OS System UI that constantly crashes, restarts, crashes again etc.
This problem is mentioned in the same thread but none of the solutions seems to work for me.
I tried to downgrade the TWRP to the older 3.3.1 and then redo the entire installation procedure => No success
Then I tried wiping and formatting all the caches/data that was mentioned during the thread + re-executing the entire installation procedure => Still no success.
Can anyone help me?

What could also be relevant:

• In TWRP I cannot seem to copy data to the device, whenever I try to do that via the File Manager (I am using Linux Mint 20) I can see the device and its internal storage but transferring data is horribly slow (it would take 5 hours 45 minutes to transfer a 3 MB file) or just fail. I also tried this in a (virtualized) Windows 10 installation with the same results.
  When earlier today (before having installed LinageOS) I tried to transfer files, it worked very well. Also, I tried it with multiple USB cables just in case it might have been a faulty cable.
• Pushing a file via adb push doesn't work as the device shows up as "unauthorized". The installation of the patches (magisk, los_patches_warsaw, opengapps etc.) I did using ADB Sideload which seemed to work nicely as well - really making me thing that the USB transfer issue is not hardware-related...

Furthermore, I know this is a noob question but anyway: the procedure says "flash los_patches_warsaw.zip". How exactly should this be done? Copying the file to the internal storage from a PC (which I cannot do, see above) and installing it via TWRP Install? Flash via Fastboot (to what destination)?

Tx in advance!

 

[KinteLiX]

I've had this issue as well, what I did was disabled dm-verity and forceencrypt using https://forum.xda-developers.com/android/software/universal-dm-verity-forceencrypt-t3817389 after flashing system in fastboot and then I flashed los_patches_warsaw.zip from SD Card (MTP is broken in older twrp, use 3.4.0, also try this at your own risk).

 

[Bart80TR]

Thanks. I solved it in another way meanwhile.
I reinstalled the stock recovery (which I was able to do by choosing the E-Recovery option in the "your device's bootloader has been unlocked" screen after startup. It reinstalled the stock recovery and ROM.
After that I installed the image from OpenKirin (it didn't need TWRP - even more, only the stock recovery is supported if using OpenKirin), and then it worked like a charm.

Just one thing, I cannot find how to update the OpenKirin installation except for flashing it via Fastboot (no option to auto-update). I wonder if it is even possible?

 

[KinteLiX]

Thanks. I solved it in another way meanwhile.
I reinstalled the stock recovery (which I was able to do by choosing the E-Recovery option in the "your device's bootloader has been unlocked" screen after startup. It reinstalled the stock recovery and ROM.
After that I installed the image from OpenKirin (it didn't need TWRP - even more, only the stock recovery is supported if using OpenKirin), and then it worked like a charm.

Just one thing, I cannot find how to update the OpenKirin installation except for flashing it via Fastboot (no option to auto-update). I wonder if it is even possible?

I think it's only possible by dirty flashing it, also a little correction for my last post, I meant internal storage not micro SD card.