Develop Bugs

[Q] About installing custom roms

Hello all well I have been following the forums much lately and have finally managed to root my Xperia Arc mobile [Lt15i]
Now the question here is that while flashing a custom kernel I was encountered with the "1 block damaged" error and hence for a while my phone got bricked which I later recovered by flashing with Flashtool.
Now I want to install custom roms and most of the tutorials which I have gone through guides us to flash the custom kernel and then flash the custom rom using recovery.
Now since that doesn't happen in my case, I was thinking whether I could just "boot" the recovery mode and then flash the custom rom.
Would it work? From what I've been reading, it seems custom roms and kernels work in conjunction... am I right or are custom roms independent of kernels?... it's just that I've been sitting here on this chair for 6 straight hours [trying to bring my arc back to life] and before I do anything I really want to be sure becuz I've gone through a big hassle.
Thank you for your time in advance.

Do you have your bootloader unlocked?
Prince

No most of the roms here needs a kernel to work. There are some few that works.
Have you tried to flash kernel with fastboot method ??
Typed down from the sky with sexy LT15i

In my experience, it depends on the custom rom.
Some custom roms, for example JJ's Hybrid will work with the stock kernel from Sony. These are usually roms that are based off the official Sony, but with various modifications and tweaks.
Other custom roms, for example FreeXperiaProject/Cyanogenmod require you to use a custom kernel as well. These roms are usually built from Android's open source code.
In any case you will need a phone with unlocked bootloader for custom roms because of the need for Clockworkmod.
Re: What you said about just booting recovery.
Yes it is possible to just temporarily "hotboot" a kernel with CWM recovery built in, BUT this requires fastboot mode, and unfortunately on Arc fastboot mode requires an unlocked bootloader.

Sorry on my part for not giving details.
Yes I have an unlocked bootloader. And it is through fastboot method that I flashed my kernel.
And I was thinking of flashing this rom on my arc
- http://forum.xda-developers.com/showthread.php?t=1681555
As far as I've searched, clockworkmod doesn't support the arc yet and the "wiki" method which I read had to use flashing using "fastboot boot boot.img" method which gives me the "1 bad sector error". Which is why I refrain from trying it.
Plus he's given the green signal that it works on stock kernel. Only the CWN mod is a problem!

Is a custom kernel necessary for a custom rom?

Hopefully my title didn't confuse anyone lol.
I was told the main reason for flashing a custom kernel is entering recovery mode, well if that's the case, I have an app called x-parts, it allows me to boot my xperia play in recovery mode without flashing a custom kernel. so....would I be able to flash a custom rom via x-parts WITHOUT having to flash a kernel?
IM HAVING THE HARDEST TIME TRYING TO GET CM7/CM9 ON MY PHONE, ANY HELP WOULD BE APPRECIATED!

Xperia Player said:
Hopefully my title didn't confuse anyone lol.
I was told the main reason for flashing a custom kernel is entering recovery mode, well if that's the case, I have an app called x-parts, it allows me to boot my xperia play in recovery mode without flashing a custom kernel. so....would I be able to flash a custom rom via x-parts WITHOUT having to flash a kernel?
IM HAVING THE HARDEST TIME TRYING TO GET CM7/CM9 ON MY PHONE, ANY HELP WOULD BE APPRECIATED!
Click to expand...
Click to collapse
I'm pretty sure you can use the same kernel for a CM7 ROM since stock and CM7 are the same Android version, basically.
However, to use an ICS based ROM, flashing a custom kernel is necessary.

Solar.Plexus said:
I'm pretty sure you can use the same kernel for a CM7 ROM since stock and CM7 are the same Android version, basically.
However, to use an ICS based ROM, flashing a custom kernel is necessary.
Click to expand...
Click to collapse
It means that i can flash CM7 on stock???? Without flash a custom kernel??? If that is true then CM7 works on locked bootloader....

No. You must have a custom kernel for a custom ROM. Any ROMs that can be flashed on locked bootloader will say so explicitly. CM7 is not one of those.

Thanks for the info guys just curious to see how kernels tried into roms

Please!Please

Please guide me after update of firmware to 6.1.A.2.452 I will loose root?.Can I flash another firmware for stock custom rom via flashtool without unlocked bootloader?.Can I unlock my bootloader after the update?Which is the best stock custom rom and other custom rom which is easy to install & better than stock rom
Rooted 4.0.4 rom with locked bootloader
6.1.A.0.452
Sent from my LT26i using xda premium

Something easy is flash your new firmware and use a kernel like "Advanced Stock ICS Kernel" to root and finally reflash your stock kernel if your want its improvements, you can unlock your bootloader anytime, and the best custom room is Cyanogen, it just needs to flash an file in recovery mode.

jhodax said:
Something easy is flash your new firmware and use a kernel like "Advanced Stock ICS Kernel" to root and finally reflash your stock kernel if your want its improvements, you can unlock your bootloader anytime, and the best custom room is Cyanogen, it just needs to flash an file in recovery mode.
Click to expand...
Click to collapse
First I need to flash new firmware then unlock bootloader and flash new kernel?
Sent from my LT26i using xda premium

Flashing on locked bootloader

I'm looking to flash my Xperia zl but the process requires flashtool and a original firmware. My question is what good is cwm? Can we not flash roms from recovery like I do on my Transformer 700?
Or do I really need to use flashtool flash a original firmware reroot then go to recovery factory reset wipe and then flash New Rom?

shadowarez said:
I'm looking to flash my Xperia zl but the process requires flashtool and a original firmware. My question is what good is cwm? Can we not flash roms from recovery like I do on my Transformer 700?
Or do I really need to use flashtool flash a original firmware reroot then go to recovery factory reset wipe and then flash New Rom?
Click to expand...
Click to collapse
Flashtool is only needed if you want to flash Sony stock rom or kernel files.
For flashing any AOSP rom (like CyanogenMod or PACman rom) or mods you need cwm recovery.
If you already have cwm just reboot your phone. On startup Sony logo just press volume + or - to enter cwm.
If not, I recommend NUT's DualRecovery (http://forum.xda-developers.com/showthread.php?t=2288118).
With locked bootloader you are not able to flash any kind of AOSP kernel.
AOSP roms need unlocked BL.
Flashtool can unlock your BL if its rootable (some carriers do not allow this).
BUT:
Before unlocking BL, make a backup of your TA partition! --> http://forum.xda-developers.com/showthread.php?t=2292598

thank you
I seen a Rom for locked bootloaders and I thought why can't I just flash this way I did with tablet I got the Rom for a locked BL.
I got the RomAur 9.0. Thanks for quick reply wasn't sure if I should proceed or not till I cleared that up.

shadowarez said:
I seen a Rom for locked bootloaders and I thought why can't I just flash this way I did with tablet I got the Rom for a locked BL.
I got the RomAur 9.0. Thanks for quick reply wasn't sure if I should proceed or not till I cleared that up.
Click to expand...
Click to collapse
I'm running eXistenZ Ultra Edition http://forum.xda-developers.com/showthread.php?t=2385313
You should try it, at the moment its the finest rom for our beloved ZL
This rom is based on .67 stock rom. Before that I was on .423 stock rom.
In order to run without problems, I had to first flash .67 stock rom with flashtool, reroot, reinstall DualRecovery and then flash eXistenZ rom.
So if you're going to flash a custom rom based on a different stock kernel than the one you're already on, first flash that stock rom with flashtool.
You can skip this step, but you might run into connection problems with wifi and data.
First flash .67 stock rom with latest flashtool.
Use this guide to get root access: http://forum.xda-developers.com/showthread.php?t=2388946
For the 11. step use this .67 kernel: https://drive.google.com/file/d/0B0duxzJgPpcyX3hhbV9wVFQ4R0E/edit?usp=sharing
You have to close flashtool BEFORE you use DooMLoRD_Easy-Rooting-Toolkit_v18 !
After the root, flash NUT's "lockeddualrecovery2.6.3-RELEASE.windows.zip" : http://forum.xda-developers.com/showthread.php?t=2288118
For the rooting process you'll need "unknown sources" and "usb debugging" checked.
Take care to follow every step as described and you should be good again. :good:
Click to expand...
Click to collapse
After everything is done, don't forget to wipe dalvik cache..

So if i can summarize, if I don't need to flash CM or AOSP Roms, and only flash rom based on Stock I don't need to unlock the bootloader ?
If I use flashtool 0.9.13, it won't unlock the bootloader ? because while i was reading their welcom page http://www.flashtool.net/index.php
I had a feeling that it unlock the bootloader, is that an option or it do it when i flash a stock rom with it ?
What are the advantages of unlocking bootlader a part from being able to flash CM AOSP based rom and kernels ?

Possible to flash custom rom via Flashfire on locked bootloader? See video inside

I know the answer is 99% NO but still how did this person do it? Does the galaxy use a different "kind" of bootloader that allows this?
https://www.youtube.com/watch?v=bZDMHktN3sc
has anyone with a rooted (but locked bootloader) G4 actually tried the latest flashfire with a G4 custom rom like resurrection?

I tried lollipop genisys and its way faster
Sent from my LG-H815 using Tapatalk

You can install Roms with locked bootloader.
I have CamUIX installed, which is based on the original rom.
I am not 100% sure but I know that you can not install custom roms which use a different kernel (any cm rom).
So it wouldn't be very useful :/
By the way, the rom in the Video is also a Touchwiz based rom

Sure you can... You can flash ANY rom that is compatible with stock kernel... Locked bootloader is only about signed boot.img and recovery.img not about system.img

oh interesting.. is there any custom G4 roms that uses stock kernel? i'm hesitant beacuse i have a h812 which has a locked bootloader and none of the roms that i see say that they can flashed for h812
it looks like genisys: http://forum.xda-developers.com/g4/orig-development/bl-lock-ul-android-6-0-marshmallow-t3459260 uses stock kernel..? will it work on my H812 if i flash with flashfire?

You can flash custom system images ONLY also on lollipop ONLY. Boot.img and recovery must be signed by lg to load with locked bootloader, they obviously arent so cant do a single s**t really.