How can i install a kernel?

[ExclusiveBFS]

I've been trying to find how to install a kernel for a few days but i couldn't find any good and updated source. I'm thinking of installing latest helium to my device. Can anyone help me?

 

[HUEguy]

I've been trying to find how to install a kernel for a few days but i couldn't find any good and updated source. I'm thinking of installing latest helium to my device. Can anyone help me?

Through any recovery is the most easy way, but you have to unlock bootloader first.

 

[Bigrrd225]

Do you even know what it does?

 

[ExclusiveBFS]

Do you even know what it does?

Yeah, I do. I just didn't want to flash it and take risk. I must have learned details

Through any recovery is the most easy way, but you have to unlock bootloader first.

My bootloader is unlocked. And I have the twrp. Thanks!

 

[XenolithicYardZone]

Yeah, I do. I just didn't want to flash it and take risk. I must have learned details

My bootloader is unlocked. And I have the twrp. Thanks!

Then just flash the .zip file via TWRP. Simple. Of course you'll need a ROM compatible with helium otherwise you'll be stuck in a bootloop.

Also goes without saying that you should take a nandroid backup via TWRP first in case something goes wrong.

Edit : When you say you have TWRP, is it part of your current kernel or you flashed it in your FOTA kernel partition via Rashr or something? If its the former then flashing Helium would overwrite TWRP and you could wind up without a working recovery cause I don't think Helium comes with any. Might want to flash TWRP in your FOTA partition with Rashr before you proceed.

 

[ExclusiveBFS]

Then just flash the .zip file via TWRP. Simple. Of course you'll need a ROM compatible with helium otherwise you'll be stuck in a bootloop.

Also goes without saying that you should take a nandroid backup via TWRP first in case something goes wrong.

Edit : When you say you have TWRP, is it part of your current kernel or you flashed it in your FOTA kernel partition via Rashr or something? If its the former then flashing Helium would overwrite TWRP and you could wind up without a working recovery cause I don't think Helium comes with any. Might want to flash TWRP in your FOTA partition with Rashr before you proceed.

I was on latest candy5, i flashed adrian dc's twrp from recovery but now I'm installing the stock ftf, I will try carbon lp rom. When the installation completed, I will flash adrian dc's twrp again. Then I will flash the helium kernel with twrp. Is there a problem with that? Should I install twrp with rashr?

 

[XenolithicYardZone]

I was on latest candy5, i flashed adrian dc's twrp from recovery but now I'm installing the stock ftf, I will try carbon lp rom. When the installation completed, I will flash adrian dc's twrp again. Then I will flash the helium kernel with twrp. Is there a problem with that? Should I install twrp with rashr?

If you're gonna flash stock firmware via Flashtool then your FOTA recovery will be wiped out. How are you gonna flash TWRP & Carbon LP rom when you don't have a recovery in the first place?

http://forum.xda-developers.com/xperia-sp/development/recovery-twrp-3-0-0-touch-recovery-t3309938

The recovery from the above thread is flashable but you still need an working recovery on your device to be able to do it right? What you can do it use the fastboot bootable image and install whatever you want if you're gonna go stock.

Actually you only need Rashr if you wanna stay stock but still want a working recovery.

 

[ExclusiveBFS]

If you're gonna flash stock firmware via Flashtool then your FOTA recovery will be wiped out. How are you gonna flash TWRP & Carbon LP rom when you don't have a recovery in the first place?

http://forum.xda-developers.com/xperia-sp/development/recovery-twrp-3-0-0-touch-recovery-t3309938

The recovery from the above thread is flashable but you still need an working recovery on your device to be able to do it right? What you can do it use the fastboot bootable image and install whatever you want if you're gonna go stock.

Actually you only need Rashr if you wanna stay stock but still want a working recovery.

I guess I couldn't explained my situation well. I installed carbon rom just now, and flashed gapps. I didn't check if carbon comes with a recovery but if it comes, I'm going to flash adrian dc's twrp through stock recovery. That's what I'm asking, is there a difference between using rashr to install twrp or flashing through recovery.

 

[Tomoms]

I guess I couldn't explained my situation well. I installed carbon rom just now, and flashed gapps. I didn't check if carbon comes with a recovery but if it comes, I'm going to flash adrian dc's twrp through stock recovery. That's what I'm asking, is there a difference between using rashr to install twrp or flashing through recovery.

Carbon provides CM recovery. Flash TWRP only through recovery, don't use Rashr.

 

[XenolithicYardZone]

I guess I couldn't explained my situation well. I installed carbon rom just now, and flashed gapps. I didn't check if carbon comes with a recovery but if it comes, I'm going to flash adrian dc's twrp through stock recovery. That's what I'm asking, is there a difference between using rashr to install twrp or flashing through recovery.

The recovery that comes with Carbon is most probably Cyanogen recovery which will not let you flash unsigned zip files like custom kernels & roms, SuperSU, Xposed, etc.

Its the reason why people install a recovery in their FOTA partitions because installing new kernels or roms (which include their own kernel) wipes out the previous recovery since Xperia phones esp older one's like ours don't have a separate recovery partition - the recovery is part of the kernel so it gets replaced by whatever came (or didn't) with the new kernel or rom. Atleast that's how it works to the best of my knowledge.

With fastboot, you could boot the device into TWRP recovery using the twrp-3.0.0-rX-boot-huashan.img file and the command "fastboot boot *filename*.img". This way its just temporary and doesn't permanently flash anything. Once in the recovery, flash the rom, kernel, recovery and you are done. That's how I did it on my Mi4i though you might want to confirm but since the description next to it says fastboot bootable, I guessing it works on the same principal.

Edit : If the kernel creator says no Rashr then its no Rashr.

 

[Tomoms]

The recovery that comes with Carbon is most probably Cyanogen recovery which will not let you flash unsigned zip files like custom kernels & roms, SuperSU, Xposed, etc.

Its the reason why people install a recovery in their FOTA partitions because installing new kernels or roms (which include their own kernel) wipes out the previous recovery since Xperia phones esp older one's like ours don't have a separate recovery partition - the recovery is part of the kernel so it gets replaced by whatever came (or didn't) with the new kernel or rom. Atleast that's how it works to the best of my knowledge.

With fastboot, you could boot the device into TWRP recovery using the twrp-3.0.0-rX-boot-huashan.img file and the command "fastboot boot *filename*.img". This way its just temporary and doesn't permanently flash anything. Once in the recovery, flash the rom, kernel, recovery and you are done. That's how I did it on my Mi4i though you might want to confirm but since the description next to it says fastboot bootable, I guessing it works on the same principal.

Edit : If the kernel creator says no Rashr then its no Rashr.

I find that flashing TWRP from CM recovery and then Helium from TWRP is much simpler than flashing TWRP as a kernel in the boot partition, then flashing the rom again and the kernel.

 

[ExclusiveBFS]

Carbon provides CM recovery. Flash TWRP only through recovery, don't use Rashr.

I flashed helium v5 for lollipop through twrp 3.0.0 and rebooted. It's not booted yet, i'm waiting for 2 minutes and the screen is black. Is it normal?

 

[XenolithicYardZone]

I find that flashing TWRP from CM recovery and then Helium from TWRP is much simpler than flashing TWRP as a kernel in the boot partition, then flashing the rom again and the kernel.

Wait hang on, CM recovery lets you flash custom zip files now without moaning about file verification? Since when?

Yes that's why I asked him to temporarily boot up with the TWRP img and then flash whatever he liked from it but hey if you can flash stuff via CM recovery now then that's one less step to worry about.

Also why no Rashr? I haven't used it in a while that's why I am asking.

---------- Post added at 05:10 PM ---------- Previous post was at 05:07 PM ----------

I flashed helium v5 for lollipop through twrp 3.0.0 and rebooted. It's not booted yet, i'm waiting for 2 minutes and the screen is black. Is it normal?

You mean black screen after the Sony splash screen? Is that rom compatible with Helium?

 

[ExclusiveBFS]

Wait hang on, CM recovery lets you flash custom zip files now without moaning about file verification? Since when?

Yes that's why I asked him to temporarily boot up with the TWRP img and then flash whatever he liked from it but hey if you can flash stuff via CM recovery now then that's one less step to worry about.

Also why no Rashr? I haven't used it in a while that's why I am asking.

---------- Post added at 05:10 PM ---------- Previous post was at 05:07 PM ----------



You mean black screen after the Sony splash screen? Is that rom compatible with Helium?

First, yes it lets you flash custom zip files, that's what I was trying to tell I always used cm recovery to install twrp
And I haven't used rashr before, I didn't know how to use it. So I flashed it with cm recovery and perfectly installed.
About helium, my phone finally booted after 9 minutes, how I scared

 

[XenolithicYardZone]

First, yes it lets you flash custom zip files, that's what I was trying to tell I always used cm recovery to install twrp
And I haven't used rashr before, I didn't know how to use it. So I flashed it with cm recovery and perfectly installed.
About helium, my phone finally booted after 9 minutes, how I scared

Sorry man didn't know that CM recovery lets you do that now. Been out of the loop for a while.

Lol yeah I can relate but as long as you can see a splash screen, you're good and when you don't, Flashtool is your light in the darkness :victory:

 

[Tomoms]

I flashed helium v5 for lollipop through twrp 3.0.0 and rebooted. It's not booted yet, i'm waiting for 2 minutes and the screen is black. Is it normal?

The reboot button is broken on TWRP. Causes black screen for a long time. You must always use the Power off option instead.

Sorry man didn't know that CM recovery lets you do that now. Been out of the loop for a while.

Lol yeah I can relate but as long as you can see a splash screen, you're good and when you don't, Flashtool is your light in the darkness :victory:

CM recovery lets you flash signed zip, and TWRP is provided in a signed zip, while even though Helium is provided in a signed zip, it can't be flashed.

 

[ExclusiveBFS]

The reboot button is broken on TWRP. Causes black screen for a long time. You must always use the Power off option instead.



CM recovery lets you flash signed zip, and TWRP is provided in a signed zip, while even though Helium is provided in a signed zip, it can't be flashed.

@Tomoms, @XenolithicYardZone Thanks for all your help, I used more than 10 roms so far but never used a custom kernel before. You two helped me a lot

 

[XenolithicYardZone]

The reboot button is broken on TWRP. Causes black screen for a long time. You must always use the Power off option instead.

CM recovery lets you flash signed zip, and TWRP is provided in a signed zip, while even though Helium is provided in a signed zip, it can't be flashed.

Yeah kinda guessed it was signed cause in all my time flashing roms, I have never known CM recovery to allow the flashing of unsigned zips. So why doesn't it work with Helium if its signed?

@Tomoms, @XenolithicYardZone Thanks for all your help, I used more than 10 roms so far but never used a custom kernel before. You two helped me a lot

Your welcome man. As a famous author once said, "Help will always be given at XDA to those who ask for it. "

 

[Tomoms]

Yeah kinda guessed it was signed cause in all my time flashing roms, I have never known CM recovery to allow the flashing of unsigned zips. So why doesn't it work with Helium if its signed?

Because CM recovery sucks

 

[XenolithicYardZone]

Because CM recovery sucks

True that!