Flashing a Kernel - EVO 4G Q&A, Help & Troubleshooting

Yesterday I installed a ROM for the first time. Today I would like to try a different Kernel. How do I just install JUST the kernel ?
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Kernels are flashed same way you flashed the ROM. Put it on your SD card, boot into recovery, wipe cache and dalvix x2, and install from SD card.

will i have to install the rom also all over again ?

No. You wont have to reinstall the ROM.
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perhaps this will be of help. this is for CM6, but the steps are the same for Sense ROMs.
http://forum.xda-developers.com/showthread.php?t=808836

morjeff said:
Yesterday I installed a ROM for the first time. Today I would like to try a different Kernel. How do I just install JUST the kernel ?
Make sure that if u have a sense rom, u have a sense kernel.. if u ever get bootloops just reflash the rom and the kernel will be replaced
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Related

*kernel deletion!!!*

Hey guys. Anyone know howto delete a kernel from your phone? I just tried with astro and then rebooted but software info still says I'm running kings #5. Any suggestions? Thanks
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Back up your existing setup,
d/l another kernel to your SD card - compatible w/ ROM you are using
boot into recovery, wipe Dalvik
flash new kernel from SD card - read notes for error(s) in CWM after kernel flash/install before reboot
reboot
check which kernel is running
Note that not all kernels work with all ROMs - certain AOSP ROMs require AOSP kernels, same story w/ Sense ROMs.
What if I just wanted to return to the stock kernel?
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xtmo22x said:
What if I just wanted to return to the stock kernel?
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ROM Manager, Virtuous section has stock kernel you can d/l and flash

Manuel kernel install?

Was wondering of there is a way to manually install a kernel via pc into a rom?
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k_chupe said:
Was wondering of there is a way to manually install a kernel via pc into a rom?
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Why don't you just reboot into recovery and flash the zip?
I wonder as well how to do this. What if my SD card takes a crap and I don't have another. How to install a custom kernel via ADB ?
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I an building a rom and want to scrap the stock kernel and replace it with a custom kernel. In other words, I want to pre load a custom kernel into a stock based rom. I want to do this from my pc. Any idea how to do this?
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k_chupe said:
I an building a rom and want to scrap the stock kernel and replace it with a custom kernel. In other words, I want to pre load a custom kernel into a stock based rom. I want to do this from my pc. Any idea how to do this?
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Ahh. No sorry I have no idea.
Maybe a question to tuff for the devs...?
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Compile the kernel then use koushes "any kernel flasher" to flash the kernel through recovery
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[Q] Proper way to flash ROM + Kernel?

I'm looking to flash a new ROM+Kernel to my phone. I wanted to flash MIUI and Tiamat's new kernel but am unsure of the proper procedure. I've only ever flashed ROMs.
Do I wipe everything, flash kernel, flash ROM and then reboot? Are there any issues I should be aware of first?
Thanks.
Wipe data/dalvik, flash rom, boot, boot back to recovery and flash kernel.
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RMarkwald said:
Wipe data/dalvik, flash rom, boot, boot back to recovery and flash kernel.
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Awesome. I was completely wrong. Thank you.
himom said:
Awesome. I was completely wrong. Thank you.
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No problem!
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Cannot install any kernel why?

Don't understand all kernel try flash keeps me in bootloop why? I Follow the steps right end up getting bootloop I even switch different recovers the same problem.
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You wiped cache and dalvik, then flashed?
Yes, always end up in a bootloop
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Try this:
-boot into your rom, backup all your apps, home screen, ect
-boot into recovery, do a complete wipe, flash your rom, boot into the rom
-boot back into recovery, wipe cache, dalvik, then flash kernel, reboot.
You're also flashing an aosp kernel for an aosp rom, and sense kernel on sense rom, not mixing them?
There's one time I manage to flash taimat sbc on sense the only problem it made graphic flickering so I restore back to stock kernel. The was it after that i can't even flash any kernel.
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culua said:
There's one time I manage to flash taimat sbc on sense the only problem it made graphic flickering so I restore back to stock kernel. The was it after that i can't even flash any kernel.
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That's your problem right there. Tiamat is an AOSP kernel and you're flashing in on a SENSE rom; its not gona work. If you want to you use Tiamat, you need to be on an AOSP rom, like CM7, Evervol, Salvage Mod, ect. For Sense, try the netarchy kernels.
Netarchy tried that too same problem.
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culua said:
Netarchy tried that too same problem.
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What rom are you using?
Stock sense
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are you using sbc or havs kernels when flashing?
culua said:
Stock sense
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Stock, as in like sprint lovers, or stock with root access?
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Stock sense with root
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Have you tried flashing a new rom? I believe you tried a factory reset already?
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Already factory reset.
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Did you try flashing a rom?
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Did you try flashing the stock rooted zip after wiping cache/dalvik/data?
Ok let me try flashing a tom cm7 then I'm going try flashing a kernel
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Nope still gives me bootloops. I'm just leave it as it is.
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Did you wipe dalvik and cache?
culua said:
Nope still gives me bootloops. I'm just leave it as it is.
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What recovery are you using? It sounds like something isn't getting properly wiped. When you flashed to a new rom, did you happen to try using Calkulin's Format all.zip? It certainly wouldn't hurt. Then get the new rom flashed and booted, then try wiping cache and dalvik cache again, then reflash your kernel. What kernel are you trying to use and on which rom? Perhaps the kernel has major undervolting and you're phone doesn't agree with it, which is not uncommon. There are options with netarchy kernels to use more, less, or no undervolting. With aosp kernels, there are some scripts you can use to change/alter the undervolting, to adjust it to where your phone is stable. So I guess that it's either because something isn't wiping properly, or because your phone doesn't like to be undervolted, or doesn't play nice with HAVS.

So I flashed a ROM...and things seem to be running fine now.

...and after the ROM, I flashed the radio, not sure if it was the proper order, but it works.
Now, if I want to flash a kernel, should I do it first, then re-flash the ROM?
Or would flashing it now be fine?
Thanks.
You can flash it now, just run Darkside Cache Wipe after and then reboot.
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RTFOP said:
You can flash it now, just run Darkside Cache Wipe after and then reboot.
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This. If you flash a kernel and then a rom, the kernel in the rom will overwrite the kernel you just flashed. Rom first, then kernel.

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