Root How to uninstall kernals?

[Wazoo]

I recently installed one of Chevy's low voltage kernels a few days ago and have since experience extremely laggy performance, random reboots, and terrible battery life compare to what I used to get before I installed it. And most of that stuff has been happening even when I have it maxed at 550. How do I go about uninstalling this kernel?

 

[Nicks88]

Install a new one. Try out P3's: P3Droid Kernels

Moral of the story: Always backup your device before making changes.

 

[Wazoo]

Install a new one. Try out P3's: P3Droid Kernels

Moral of the story: Always backup your device before making changes.

I did a complete nandroid backup before I installed it, so restoring it is the only way to get rid of it?

 

[Nicks88]

Yes, unless you can find the exact kernel file somewhere and install it that way. But go ahead and mess around with P3 and others kernels since you have a backup. Maybe you can find one that really works with your phone.

 

[Wazoo]

Yes, unless you can find the exact kernel file somewhere and install it that way. But go ahead and mess around with P3 and others kernels since you have a backup. Maybe you can find one that really works with your phone.

Ok. And when a new kernel is installed, does it replace the older one, or how does that work?

 

[johnlgalt]

IIRC, If you do an Advanced restore and only restore boot, it will restore the original kernel that came with the ROM. You DO NOT wipe when doing this.

I may be wrong about this, though. let me look around....

Well, Nick says otherwise....

 

[Nicks88]

IIRC, If you do an Advanced restore and only restore boot, it will restore the original kernel that came with the ROM. You DO NOT wipe when doing this.

I may be wrong about this, though. let me look around....

Well, Nick says otherwise....

You lost me at advanced...lol

 

[Nicks88]

Ok. And when a new kernel is installed, does it replace the older one, or how does that work?

If you are looking for what happens technically, then I'm sure someone will chime in and give us some 'geek speak'. But for my limited brain capacity, it 'magically' takes the place of the old one.

 

[johnlgalt]

He said he has a Nandroid of the original ROM.

In SPRecovery AND ClockworkMod, you have the options to perform an Advanced Nandroid restore - and this allows you to pick the file an pick only the elements that you want to restore.

I am still looking, but IIRC, the boot section of a Nandroid backup is (or at the very least contains) the kernel. Therefore, restoring just boot via an Advanced Nandroid restore should, theoretically, restore the original kernel, without having to wipe all the rest of the stuff out, leaving you with your customizations, themes, etc.

 

[Nicks88]

He said he has a Nandroid of the original ROM.

In SPRecovery AND ClockworkMod, you have the options to perform an Advanced Nandroid restore - and this allows you to pick the file an pick only the elements that you want to restore.

I am still looking, but IIRC, the boot section of a Nandroid backup is (or at the very least contains) the kernel. Therefore, restoring just boot via an Advanced Nandroid restore should, theoretically, restore the original kernel, without having to wipe all the rest of the stuff out, leaving you with your customizations, themes, etc.

Let us know of what you find...I'm always down to get my learn on! Or we could find a guinea pig....Wazzzzoooooooo?

 

[johnlgalt]

Ok. And when a new kernel is installed, does it replace the older one, or how does that work?

Exactly. Think of the kernel as (loosely) a driver on your computer for, say, your sound card - you install a new driver and it replaces the existing driver.

This is an over-simplification, but it should be sufficiently accurate for argument's sake.

 

[johnlgalt]

Let us know of what you find...I'm always down to get my learn on! Or we could find a guinea pig....Wazzzzoooooooo?

Hell, I'll be my own guinea pig. I am running Pete's BB 0.2, and was just about to flash the jldfg kernel on here - so I can do that, then restore the boot and see if it reverts.

Give me 5 minutes.

 

[Wazoo]

But for my limited brain capacity, it 'magically' takes the place of the old one.

Thanks, that's all I need to know.

 

[johnlgalt]

I am such a moron. I didn't realize that I had not made a Nandroid backup of Pete's BB that I ma running - so I cannot readily test it (only B/U I have already has the kernel I just flashed onto this ROM....

I will make a B/U of this ROM, then change the kernel, then restore from that made backup - so my end result should be that I get this kernel back.

Give me about 10 minutes more.

 

[johnlgalt]

OK, verified.

if you do an Advanced Nandroid Restore and restore only boot it will restore your original kernel.