[Q] what is custom kernel and what are best combinations?

Hello , my name is ahmed
I've been flashing roms and custom roms for several android devices for a year now - and I have good experience in idevices iphone ipad softwaring and jailbreaking

I always used stock rom first then flash custom rom so I can build my rom on a basic stock kernel.
Until I faced many bugging and lagging problems and some battery drain ones too !

So my question is I wanna try custom kernels I heared it helps the rom and the device for more power and cpu control
I need to know what is kernel is more deep way than just " the heart of the device " as many guides say here
I need also to know what are the best combinations between customs!

actually I do need to know more about threads I'd face if I got involved into this.
Thanks in advance

boomboomer said:

You need to search, read and test. No one can give you an exact answer and threads asking for recommendations are against the posting rules, as they can cause bad feeling.

The kernel is the layer between the rom and hardware, it contains all the drivers etc to implement the software calls. Custom kernels will allow you change things that stock won't, usually with some risk.

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Thanks for the reply
But I read in some topics I have to use a specific kernel with specific rom idk why they said that . Can u help me with that ?

And I wonder , by using a kernel with note 3 on a custom rom can I still have s pen features somehow ? And detectors like air gestures ? Or its related to samsung stock touchWiz only ?