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Negatives of Flashing Custom Kernel

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Default Negatives of Flashing Custom Kernel

Are there any negatives to flashing a custom kernel? I want to put the knock feature on my N5 and from what I understand it requires a custom kernel. Can I just flash it or do I have to wipe my data? Thanks.
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Just flash it in recovery. Wipe is not needed. If you are worried you could make back up first. Stock kernel is also available aroud the forum.
However if you are talking about the knock which wakes up tje screen, it is very power consuming in my exp...

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Not really any downside. I mean technically the custom kernels on here are experimental and they're always being updated, so you might run into bugs here and there, but if you can always reflash the stock kernel if you're unsatisfied with a custom kernel.
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