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Switching kernels; do you need to reflash?

Im on cm7 with dragon kernel. If I wanted to flash faux kernel, do I need to reflash cm7? My guess is I would probably would need to reflash the entire ROM over.
Sent from my LG-P999 using XDA App

No, just wipe cache and dalvik cache in recovery then flash any kernel. And i believe if you want to go back with cm kernel, same wipe then reflash rom..
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noodles2224 said:
No, just wipe cache and dalvik cache in recovery then flash any kernel. And i believe if you want to go back with cm kernel, same wipe then reflash rom..
Sent from my LG-P999 using Tapatalk
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+1
I also started doing a fix permissions after flashing new kernel.!

fcisco13 said:
+1
I also started doing a fix permissions after flashing new kernel.!
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I+1 for the fix permissions and I ndont see a stock cm kernel so I think he is right if you want stock cm kernel you have to reflash or restore a nandroid backup.

Couldn't you technically go thru advanced restore and just flash the kernel? I've only gone into there once but can't remember the options available. (This would be to restore cm7 kernel only, follow previous instructions for new kernels)
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wgrant said:
Couldn't you technically go thru advanced restore and just flash the kernel? I've only gone into there once but can't remember the options available. (This would be to restore cm7 kernel only, follow previous instructions for new kernels)
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I think advanced would only let you restore system, data, cache, dalvik cache, boot.img, individually

fcisco13 said:
I think advanced would only let you restore system, data, cache, dalvik cache, boot.img, individually
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Just checked it and was about to edit my post. You are correct, no kernel option, would be cool if backups created included the currently installed kernel and you could restore thru that too.
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Installed kernel, Phone won't turn on

I installed the elpmax kernel of this website derkernelcom. I cleared the cashe before I did it. But now when I turn the phone on I just get a black screen. How do I fix this. I can reboot into recovery.

Flash the old kernel or clean everything then reinstall the rom
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Wipe cache, clean dalvik cache, flash kernel, fix permission then reboot. Check if u fleshed good kernel for ur rom
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How should you flash a rom and a kernel?

What are the steps should u flash a kernel right after you flash a from or should you reboot then flash the kernel thanks for your help!
Sent from my Nexus S using xda premium

Hi There,
I always flashed the kernel right after flash the rom and haven't got any issues.

For a new rom, data factory reset, format /system and format /boot then flash straight away most of the time. For an upgrade, only wipe cache and dalvik cache.
For a kernel it depends, but generally just cache and dalvik cache will be fine.

Wipe cache and Dalvik cache before flashing ROM as well. I do wipes 2 or 3 times..
Sent from my Nexus S 4G using XDA App

I always do a double wipe before flashing any new rom and do a dalvik/cache-wipe before flashing a new kernel
For that i use the attached filed. Just flash via recovery (any). Helps to do it a little bit faster like doing in manual

Tutorial for flashing/installing a kernel

Hi
I just bought my first android phone which is a Google Nexus S, and I guess flashing/installing (I never know which is the correct term to describe this action!) a kernel from XDA can give better performance or some extra features, e.g. BLN
However, I don't seem to be able to find a complete tutorial of how to flash/install a kernel, can anyone help me with this please?
Thanks in advance

First you need root.
Reboot into recovery and wipe Dalvik cache maybe twice.
Then find the kernal in your SD and install
Reboot
Sent from my Nexus S 4G using XDA App

wipe dalvik cache once. then proceed to flash kernel

http://forum.xda-developers.com/showthread.php?t=1229794
[ACS] [HOW TO] Root, Unroot, Flash Roms/Kernels/Themes, and CWM! (17 videos) 12/16/11
Sent from my Nexus S 4G using xda premium

Is this the same guy that made multiple accounts just to make it seem like his thread was very active? If so your bad.
Sent from my Nexus S 4G using XDA App. Developer of brickROM, and OP of XDA Thread of The Year 2011.

wipe dalvik cache??
Does it mean I will lose all my data please?

double Wipe

weylon said:
double Wipe
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Does it mean I will lose all my data please?

Wiping cache does not delete your data.
Unlocking the bootloader to get a custom recovery will wipe everything.

albundy2010 said:
Wiping cache does not delete your data.
Unlocking the bootloader to get a custom recovery will wipe everything.
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so in this case, flashing a kernel will NOT delete my data, correct? since I don need custom recovery, and I have already rooted

U dont need to wipe cache. Simply wipe delvik cash then flash your kernel on your sensation.
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luckyvictor said:
so in this case, flashing a kernel will NOT delete my data, correct? since I don need custom recovery, and I have already rooted
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You don't have a custom recovery? I suppose you could use Flash Image GUI but you're really gonna wanna get a custom recovery. Especially since you want to make a backup before you flash in case something goes awry.
*if you didn't wipe /system and /boot it is NOT A FULL WIPE*

Doesnt matter just wipe dalvik cache and ur good. Through custom recovery
Sent from my MIUI.us Sensation 4G using XDA App

clockwork recovery is the base for flashing anything.
http://forum.xda-developers.com/showthread.php?t=1007782
use this guide to install CWM(See Part 3 of the Guide)
once done just wipe dalvik cache in CWM and flash any kernel .zip file

you dont need to wipe dalvik cache, cache, or anything else. as these dont have anything to do with the kernel. you can flash kernels via recovery(in .zip form), or with fastboot/terminal emulator(in boot.img form).

Is it better to flash a kernel with the ROM?

In my case I have been running Carbon Rom for about a week now. I want to flash Lean Kernel. I wanted to know if it is better to re-flash the ROM along with the kernel? Or would it be alright if I flash the kernel right now through recovery, wipe cache/dalvik and call it a day.
Any suggestions and input would be greatly appreciated.

Backup, flash kernel, wipe cache and dalvik, fix permissions, reboot.
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