[KERNEL][10.0.0] Sultan Kernel [August 14, 2020]

[ViperPyro]

According to OP's post, the kernel should be installed prior to TWRP and Magisk. That's the issue.
I have both of them already installed, and TWRP strangely installed in slot A whereas lineageOS and Magisk installed in slot B.

Ah I was referencing for a LOS upgrade when all I need is a new kernel. I use Sultan and it detects Magisk and keeps it, so no loss in doing the kernel last after an OS update.
I've never noticed your condition with split recoveries on the two slots, but either way, you can fastboot boot twrp and flash twrp again if that is what you prefer, then just use either recovery to flash kernel and Magisk again as desired, over stock LOS.

 

[bonedriven]

..., but either way, you can fastboot boot twrp and flash twrp again if that is what you prefer, then just use either recovery to flash kernel and Magisk again as desired, over stock LOS.

In Op's first post,

This is the order in which the kernel, TWRP, and Magisk should be flashed:
Kernel -> TWRP (optional) -> Magisk (optional)

But OP didn't mention what happens if one flashes not in that order. Does it brick the phone or just you have to flash in that order over again.
If it's the later, it's fine despite some more steps.

BTW, I don't know if battery life does improve with this kernel for the standby state. My pixel2 drops more than 20% battery over night just standby with lineageOS, and this is already improvement compared to the previous stock OS (drops 40%) if wifi is on. On the other hand, my iphone laying around pixel2 drops around 4% battery over night with every connection type on.

 

[rayner123]

I got a general question, would flashing a custom kernel improve the sounds picked up by the microphone during phone calls i.e. is there anything in the kernel that can be tweaked to improve sound picked up during phone calls? Ever since I got the pixel 2 (Second hand) I keep getting told I am not audible, had a S7 edge before. So I have turn up the "call volume" which ends up improving the microphone situation but also means the earpiece is blasting the audio of the person I am talking to. Although I haven't tried to isolate the problem to whether it is the phone or it is the network.

 

[ahm_usa]

What if I have magisk already flashed but i need to flash this kernal? do i need to uninstall MAGISK FOR THIS??

 

[ViperPyro]

What if I have magisk already flashed but i need to flash this kernal? do i need to uninstall MAGISK FOR THIS??

No, you can just flash the kernel if you are already on a ROM with Magisk installed. It will preserve Magisk. If you are concerned, flash Magisk again anyway.
You won't break anything special due to the three kernel, magisk, TWRP flashing steps. All it does is ensure the right aspects are preserved since some will overwrite others.

 

[ahm_usa]

No, you can just flash the kernel if you are already on a ROM with Magisk installed. It will preserve Magisk. If you are concerned, flash Magisk again anyway.
You won't break anything special due to the three kernel, magisk, TWRP flashing steps. All it does is ensure the right aspects are preserved since some will overwrite others.

One more thing to ask Sir will I be able to update lineagOS and will I have to flash this kernal again??

 

[ViperPyro]

One more thing to ask Sir will I be able to update lineagOS and will I have to flash this kernal again??

Yep to both!
The kernel will not impede updating LOS. You can even use the build in updater that does not require TWRP flashing.
LOS includes its own default kernel, so any flash or update will migrate you to the LOS kernel. You can then simply flash (TWRP, LOS recovery, app) Sultan again to get it back. LOS also includes a recovery, so you'll lose TWRP, but you will keep Magisk each time if I recall.
You can always reflash all 3 items any time.