Info wanted: Strange (software) problem w. WiFi, Qualcomm download mode did not help

Shervrar

Member
Mar 19, 2013
27
3
23
Does anyone know what changed regarding wifi in Android 8 or MIUI 10?
I was happily using LOS 14 for a while (after having officially unlocked my bootloader at some point in the past, but became curios and wanted to try out the new MIUI 10. While I could not find anything official, I did find this chinese dev ROM (I DO NOT RECOMMEND YOU FLASH THIS). I flashed it, wasn't that impressed and then decided to try LOS 15 based on Android 8.

That was a bit too unstable for me, so I tried reverting back to LOS 14.
I did so using a backup I made to my pc (I did `adb backup` while in TWRP and selected every partition I think). After booting into LOS14, things seemed to crash an awful lot.

At this point I realized wifi wasn't working. It showed a MAC Address of 02:00:00 I think, but no networks were found. I tried restoring my phone using MiFlash normally. I then tried restoring it using Qualcomm's download mode. Older MIUI versions would not boot anymore (although I did manage to boot an old version of TWRP made for the pre-Nougat bootloader). I tried LOS14 again, and attempted using fastboot to erase various partitions (such as the bluetooth and modem partition, and then manually flashed the image again. Still no wifi.

Does anyone know what could have happened? My bootloader is still unlocked, and even downgrading the device to an old version of MIUI using Qualcomm mode did not make it work again? How come LOS15 and MIUI 10 are able to use wifi without problems?

tl;dr WiFi stopped working on any rom other then Lineage OS 15 or MIUI 10.
 
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