Revert to stock OS with Custom Kernel - OnePlus 7 Pro Questions & Answers

I'm currently running Havoc OS with the SmurfKernel. I'm trying to revert to OOS using the Fastboot ROM but after installation I get a Qualcomm Crash dump error with kernel_restart underneath, how would I flash back to OOS ?

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Revert from HammerheadCAF to Hammerhead?

Hi guys,
I flashed my bootloader and TWRP in order to install CM 12.1 NIGHTLY HammerheadCAF ROMs. It's working fine, but now I want to try the Android M preview. Do I just have to flash the original bootloader and non-caf TWRP and be back to normal?
Flashed stock images via fastboot and back to normal.

How to revert back to stock kernel on Nexus 5, android Marshmellow

Hello guys, few months back i had installed the Android M preview and then to root the device i had installed a custom Kernel on my Google Nexus 5. Now i have upgraded to the stock MRA58N 6.0.0 ROM manually using the factory images by google. Now i want to know, how can i revert back to the stock kernel. And is flashing stock automatically reverts back to stock kernel? How will i root again on Android 6.0.0 please help
Flashing the factory images replaces the current kernel (if using the flash-all script). If you have flashed them one by one, did you flash the boot.img file?
To root MM builds, check SuperSU MM thread to flash a modified boot image then flash SuperSU or flash a custom kernel then SuperSU.

Downgrade to Stock Rom

Hello,
I am currently using Lineage OS 15.1 but as I have massive lags, I would like to go back to stock rom.
First question:
1) How can I get the offiical rom?
2) What is the proper process of downgrading?
Thanks,
Just flash this like any other ROM in TWRP. It's the stock 251
https://drive.google.com/file/d/1f3USp3-VncUAtIi2aBzSZ7kzLlYJ7iok/view?usp=drivesdk

Error while installing stock miui rom

Recently i installed custom recovery on my redmi 5 plus successfully and installed havoc os 3.6 and it was working well , now when i tried to flash stock miui rom on my device it flashed successfully but the android stucked at miui logo and some times takes me up to miui setup and suddenly reboots again and again . kindly help
Seems like Flash-Clash
Hi, have you erased/cleaned earlier RoM before flashing stock MiUi RoM ???
I faced this issue when I flashed Stock MiUi back on Redmi Note 3. I had bootloader unlocked and used Mi Flash tool to clean all and then reflash the Stock RoM available on en.miui.com
Or fastboot RoM can be utilised when flashing through fastboot. But this will only work when bootloader is unlocked.
Hope that helps.

Flash Latesh 11.0.2.1 Via Fastboot?

Hi
How can I flash latest OOS 11.0.2.1 from Fastboot, coming back from custom rom?
Whenever i want to come back from custom rom i had to install A10 using MSM and then updatev it to 11? is there any way i can directly install 11.0.2.1?

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