[Q] About custom kernels - Xperia Arc Q&A, Help & Troubleshooting

Can anyone explain me in short some basic things i need to know about flashing custom kernels, such as does my bootloader need to be unlocked, root access, etc.
Also can you suggest me one for begginers something easy to install and test.
Thanx in advance!
I have ICS 4.0.4 [.587] (XPERIA Arc S)

DjDexter5GHz said:
Can anyone explain me in short some basic things i need to know about flashing custom kernels, such as does my bootloader need to be unlocked, root access, etc.
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Happy reading. http://forum.xda-developers.com/showthread.php?t=1653188

I know i saw that post somewhere thanx mate...

Related

(Q)bootloader and rooting

hi to every one i would like to ask before i unlock my bootloader and rooting stuff. im presently on stock rom right now with firmware 2.3.4 baseband ver. -64 and build number .62. i alredy browse threads and guides about this but unfortunately i was not able to find answer.
ok my question is this.
1. will it be possible for me to install custom rom if im just going to unlock my bootloader but not rooted?
2. there are topics about easy rooting on gen. discussion .i just like to ask,is it possible to disregard downgrading process from .62 to .42 if the bootloader is unlocked for the rooting process. since i dont want to downgrade.there has been issues of bricking the phone if your going to downgrade and update afterwards via ota.
3. can anyone give me updated guide for unlocking bootloader and rooting based on my current firmware.
Thanks in advance.
shallumabijah said:
1. will it be possible for me to install custom rom if im just going to unlock my bootloader but not rooted?
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Yes, custom roms are usually (always?) prerooted, so it gives u root permissions. Bootloader is needed to flash custom kernel.
shallumabijah said:
2. there are topics about easy rooting on gen. discussion .i just like to ask,is it possible to disregard downgrading process from .62 to .42 if the bootloader is unlocked for the rooting process. since i dont want to downgrade.there has been issues of bricking the phone if your going to downgrade and update afterwards via ota.
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Click to collapse
If the bootloader is unlocked ur phone gets bricked after update. However u can downgrade with locked bootloader, next root and than update. If u want lock bootloader use file attached (unpack rar archive and flash ftf using flashtool).
On the other hand u can install CWM and use RootXperia.zip (attached) to root.
shallumabijah said:
3. can anyone give me updated guide for unlocking bootloader and rooting based on my current firmware.
Click to expand...
Click to collapse
Bootloader:
Unlocking
Root:
1. 2.3.3 - use SuperOneClick Method (maybe work with 2.3.4 i dont use it) or RootXperia.zip or custom Kernel/Rom
2. 2.3.4 - use RootXperia.zip or Custom Kernel/Rom
chemney thanks for the reply..strange i cant find the thanks button using my arc. im going to use my compiuter later.
my arc is 2 days old. so im thinking if im going to unlock and root my phone or not..haha.
Unlock it
You won't regret it
Sent from my LT15i using XDA Premium App
@flo95
im really planning to do that.but before proceeding i would like to ask if it is compulsary to downgrade to .42 to gain root access cuz my im on .62 right now.
what do you think should i do first unlock bootloader or the rooting process.?
actually i already tried to unlock my boot loader but in typing imei process the instruction wanted me type 14 digits but upon seing my phones imei it has 15 digits. haha
@shallumabijah
next time read instructions it better
Instructions | Sony Xperia said:
the first 14 digits (remove the last digit) of your phone’s IMEI number
Click to expand...
Click to collapse
first what i did when i began to want root my phone was unlocking bootloader and than flashing DooMKernel which is prerooted and i didnt need to do it myself (also i got OverClocking, UnderVolting and some other things which i hadnt with stock kernel)
shallumabijah said:
chemney thanks for the reply..strange i cant find the thanks button using my arc. im going to use my compiuter later.
my arc is 2 days old. so im thinking if im going to unlock and root my phone or not..haha.
Click to expand...
Click to collapse
no problem. in xda app if u touch post for the moment u got menu. slide it and there is bouquet of flower with "thanks" (i think cause i have polish version)
ch3mn3y said:
@shallumabijah
learn reading
first what i did when i began to want root my phone was unlocking bootloader and than flashing DooMKernel which is prerooted and i didnt need to do it myself (also i got OverClocking, UnderVolting and some other things which i hadnt with stock kernel)
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Click to collapse
ive been reading topics about this but up to now my confidence is not that hi to proceed. im on htc desire s before which is rooted. i think im going read more before proceeding..im new to arc society.hehe.thanks again.

Need help please?

Okay sorry about all the threads its just I keep getting other problems. I want to get Root, Unlocked Boatloader, Custom Kernel and a Rom for my arc S. I flashed back to .42 so start all over but I can seem to root it now, if I use SuperOneClick can I still unlock the boatloader? If someone can just post some easy steps that I can follow it would be appreciated. DooMs easy rooting kit did not work either and nierther did the RootXperia.zip file :/ So please help?
Thanks a lot for those who do!
rooting has no effect on bootloader 'unlockability', but if you unlock your bootloader you'll find any kernel/rom you flash will be pre-rooted. There are a few ways to unlock, I used the SE/Sony site which gives you a step by step guide. You can use other methods by certain xda members, though they're not free obviously. I found this helpful too.
sinkster said:
rooting has no effect on bootloader 'unlockability', but if you unlock your bootloader you'll find any kernel/rom you flash will be pre-rooted. There are a few ways to unlock, I used the SE/Sony site which gives you a step by step guide. You can use other methods by certain xda members, though they're not free obviously. I found this helpful too.
Click to expand...
Click to collapse
Do I unlock the boatloader first?
Yep, no need to root if it's unlocked. Read everything before you attempt it, there are a few downloads before you can use adb(for fastboot, etc) so google anything you're no too clear on. It's fairly straightforward but can be time consuming...
sinkster said:
Yep, no need to root if it's unlocked. Read everything before you attempt it, there are a few downloads before you can use adb(for fastboot, etc) so google anything you're no too clear on. It's fairly straightforward but can be time consuming...
Click to expand...
Click to collapse
So can I also unlock it .42 then do OTA and it will still be unlocked?
Basically, once you've unlocked your bootloader you can't use OTA or pc companion to update. You need to use firmwares/roms from xda, so you would use flashtool to flash a rom, fastboot to boot a kernel. Most devs will give instructions in their threads. Unlocking your bootloader doesn't automatically root your phone; flashing a custom rom or booting a custom kernel will.
sinkster said:
Basically, once you've unlocked your bootloader you can't use OTA or pc companion to update. You need to use firmwares/roms from xda, so you would use flashtool to flash a rom, fastboot to boot a kernel. Most devs will give instructions in their threads. Unlocking your bootloader doesn't automatically root your phone; flashing a custom rom or booting a custom kernel will.
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Click to collapse
Could you PM me please?

Do I really need my bootloader unlocked?

Im not such a fan of custom roms or custom kernels. I always stay on Stock roms, I dont really like to mess around with my phone other then rooting it and i also like to replace system apps from other phones I previously had, so I usually make nandroid backups if something goes wrong I just go back to a previous working backup.
So my quetion is guys... Do I really need to unlock my bootloader? If I brick my phone and need to reflash my stock rom do I need to have it unlocked? Or what would be another way of getting it back to life? Oh and finaly can I have CWM without been unlocked? Please any help would be greatly appreciated.
No one "needs" their bootloader to be unlocked. We unlock it for extra functionality such as flashing custom roms. Since you don't care about that, why do it? No, you don't need an unlocked bootloader to flash back to stock. Yes, CWM can be installed with just root now. These are easy answers that you could find by searching around a little
Thank you bro, but I swear I searched as a matter of fact I have been reading different posts for two days but no one specified this. There is a guide on how to flash CWM but it says you need bootloader unlocked and as of now I still havent found a guide on how to flash stock roms to our Xperia Play so thats why I posted these questions. Im gonna try and find the ways of flashing custom roms and cwm...
installing cwm couldn't be any easier... Just download cwm installer from somewhere Google it and that's it... Or try xparts from the market which is the same app but is just the latest version but I saw people having problem with it maybe they fixed the problem
cippi21 said:
installing cwm couldn't be any easier... Just download cwm installer from somewhere Google it and that's it... Or try xparts from the market which is the same app but is just the latest version but I saw people having problem with it maybe they fixed the problem
Click to expand...
Click to collapse
Yeah thanks alot bro, I found this http://forum.xda-developers.com/showthread.php?t=1390771 (for future refrence). Now I only need the stock rom flashing... Im reading something about flashloader I think im close.
Flashtool is a great program for flashing stock roms...give that a try
cippi21 said:
Flashtool is a great program for flashing stock roms...give that a try
Click to expand...
Click to collapse
Thanks bro im gonna try it.

How to install pre-rooted Jelly Bean 4.1.2 from doomLord on Xperia S

I have recently flashed my Xperia S to a Global official release of Jelly bean 4.1.2 using flash tool.
However, there is one software much needed for me, called "proxyDroid".
The wifi Network in my campus is proxy protected and this app is necessary to allow all apps to use general proxy settings.
However, this app wants my phone to be rooted before installing it.
i googled about "How to root Xperia S with JB 4.1.2" and found doomLord's page with prerooted version of JB,
But the instructions were too complex for a first timer like me.
Here's the page:http://forum.xda-developers.com/showthread.php?t=2302631
Kindly simplify it for me, or please let me know if there's a simpler way to root my phone. I do not want to brick my phone so I am not taking any chance on things I don't understand.
Please, provide necessary guidance.
http://forum.xda-developers.com/showthread.php?p=42155306
Sent from my 4.2.2 Xperia S via Tapatalk
It says I need ICS installed. :/ While I already flashed by phone to JB 4.1.2
i do not find hose turtorial simple enough :/
Ben36 said:
http://forum.xda-developers.com/showthread.php?p=42155306
Sent from my 4.2.2 Xperia S via Tapatalk
Click to expand...
Click to collapse
What is exactly rooting of phone? Do I void my warranty if I root my phone? If yes, can I un-root it to restore warranty later?
Is there chance of bricking the phone?
In your tutorial your first lines are,
Root jb for locked bootloader
Sooo many people just asking the same question. Its simple!
(this is currently the only way for LB)
You need ics installed, rooted with cwm
Click to expand...
Click to collapse
Unlocking bootloader on my phone is allowed. Do I still need to follow the same tutorial?
What is LB? (locked bootloader?)
I don't have ics installed, I have official JB 4.1.2. What is cwm? How I root with it?
I have this idea
Can I still factory format to stock OS from settings?
I can follow doomLord's guide here:http://forum.xda-developers.com/showthread.php?t=2302631 if yes.
Also, what does he mean by "make sure that the /system partition is unmounted, i have noticed that in some kernels the /system partition remains mounted"? How do I check it?
Also how do I reboot my device in recovery mode?
Thanks
All of those. Either Google or Search here.
FenrirMX said:
All of those. Either Google or Search here.
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Click to collapse
I understand that I might be asking too much. But I have flashed my phone recently. Just tell me if doing factory reset is safe for me or not? I'll take it up from there.
akatsukiaashish said:
I understand that I might be asking too much. But I have flashed my phone recently. Just tell me if doing factory reset is safe for me or not? I'll take it up from there.
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Click to collapse
All the steps in the DooMLoRD pre-rooted ROM thread are safe if you follow them. I know because I followed them and my phone is fine, dandy and, best of all, rooted.
Thanks
FenrirMX said:
All the steps in the DooMLoRD pre-rooted ROM thread are safe if you follow them. I know because I followed them and my phone is fine, dandy and, best of all, rooted.
Click to expand...
Click to collapse
But, I already have generic JB 4.1.2. i just want to root it, should I still go for it?
Also, what doomLord he mean by "make sure that the /system partition is unmounted, i have noticed that in some kernels the /system partition remains mounted"? How do I check it?
I am posting here because I still have less than 10 posts. :/
Why do you give him root way with unblocking BL? Are you crazy? To author of questions : DO NOT OPEN BL! You are to amateur to do that. Root isn't void your guaranty. Check out posts how to flash ICS again, and then install JB PREROOTed
Tap Tap Tapatalk - Xperia S / Stock 4.1.2 /
ThaweK said:
Why do you give him root way with unblocking BL? Are you crazy? To author of questions : DO NOT OPEN BL! You are to amateur to do that. Root isn't void your guaranty. Check out posts how to flash ICS again, and then install JB PREROOTed
Tap Tap Tapatalk - Xperia S / Stock 4.1.2 /
Click to expand...
Click to collapse
haha. Alright, thanks will look into that right away
ThaweK said:
Why do you give him root way with unblocking BL? Are you crazy? To author of questions : DO NOT OPEN BL! You are to amateur to do that. Root isn't void your guaranty. Check out posts how to flash ICS again, and then install JB PREROOTed
Tap Tap Tapatalk - Xperia S / Stock 4.1.2 /
Click to expand...
Click to collapse
Maybe before spouting off personal attacks you should learn to read. I never even once mentioned unlocking bootloader.

[Q] Rooting - am i doing it right?

Hi.
Either I overlook in all thread or I dont understand a thing.... my device is xperia zl 6502 4.2.2
I have a question regarding rooting my xperia zl.
1) How to know if my xperia ZL properly root? I'm using doomlord easy rooting v16.
2) what is this step by step in sony's web for? http://unlockbootloader.sonymobile.com/instructions. fyi, my phone allow bootloader unlock...
3) Custom Recovery. I need to have one? I'm not flashing any custom rom, kernel etc. i have titanium backup btw...
4) Can i update to 4.3 without losing anything (root, apps, etc)?
Actually i have more questions but at time I wrote this I kind of forgot....
Thanks in advance to whoever answer my questions...
favelle bono said:
Hi.
Either I overlook in all thread or I dont understand a thing.... my device is xperia zl 6502 4.2.2
I have a question regarding rooting my xperia zl.
1) How to know if my xperia ZL properly root? I'm using doomlord easy rooting v16.
2) what is this step by step in sony's web for? http://unlockbootloader.sonymobile.com/instructions. fyi, my phone allow bootloader unlock...
3) Custom Recovery. I need to have one? I'm not flashing any custom rom, kernel etc. i have titanium backup btw...
4) Can i update to 4.3 without losing anything (root, apps, etc)?
Actually i have more questions but at time I wrote this I kind of forgot....
Thanks in advance to whoever answer my questions...
Click to expand...
Click to collapse
4) Can i update to 4.3 without losing anything (root, apps, etc)? --> JB 4.3 will be available on Q4 2013

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