Database Info

[Q] JB update and custom kernel

Hi all,
I'm sorry about my stupid question but I really don't know nothing about that . I had rooted and flashed my NS and installed the matr1x kernel (very good btw), and now I knew that JB will be available to NS. My question is, need I back to stock kernel to receive the update?
Thanks
Sent from my Nexus S using xda app-developers app

Gnng
You have to understand that installing an OTA (official update) on a rooted device regardless of what kernel can cause problems, as it did with my Nexus S before. I suggest you make a NANDroid backup at all times before you install any ROMs, official or Custom. You can also use Titanium backup and others.
There's still a slight while until the new JB 4.1 comes out. It's suggested that you install a Custom JB 4.1 ROM for your Nexus S as though you don't cause any problems. I think it's OK if you do it with the kernel pre-installed. But people always install the Custom ROM THEN they install the Kernel, I think installing a new ROM always overwrites the kernel, if it comes with it.
EDIT:
In short, wait for the JB Custom ROM and you don't have to revert back to stock kernel, when you do the update it will automatically overwrite. Most Custom ROMs come with Stock/ordinary kernels. So then the user can flash whatever kernel they like in your case, matr1x.
Wish you the best of luck, and I am waiting for the Nexus S JB to come out as soon as possible

Ota binary patches the boot image iirc. So it can get all messed up.
Sent from my Samsung Epic 4G using Tapatalk 2

Yeah, what he said!
MДЯCЦSДИT said:
Ota binary patches the boot image iirc. So it can get all messed up.
Click to expand...
Click to collapse

andezzat,
Thank you very much for the help.
andezzat said:
Gnng
You have to understand that installing an OTA (official update) on a rooted device regardless of what kernel can cause problems, as it did with my Nexus S before. I suggest you make a NANDroid backup at all times before you install any ROMs, official or Custom. You can also use Titanium backup and others.
Click to expand...
Click to collapse
I didn't any backup before flashing a new kernel :crying:, so what can I do now if I want my stock kernel back?? What's a NANDroid (I know that is a tool but how can I do it?) ? Is Titanium bkp easily?
There's still a slight while until the new JB 4.1 comes out. It's suggested that you install a Custom JB 4.1 ROM for your Nexus S as though you don't cause any problems. I think it's OK if you do it with the kernel pre-installed. But people always install the Custom ROM THEN they install the Kernel, I think installing a new ROM always overwrites the kernel, if it comes with it.
Click to expand...
Click to collapse
I prefer wait for stock JB Rom and probaby I'll , but, can I already find some JB ROM?
In short, wait for the JB Custom ROM and you don't have to revert back to stock kernel, when you do the update it will automatically overwrite. Most Custom ROMs come with Stock/ordinary kernels. So then the user can flash whatever kernel they like in your case, matr1x.
Click to expand...
Click to collapse
I don't need to remove the kernel even unroot my cell, alright?
Thank you!!

Gnng said:
I didn't any backup before flashing a new kernel :crying:, so what can I do now if I want my stock kernel back?? What's a NANDroid (I know that is a tool but how can I do it?) ? Is Titanium bkp easily?
Click to expand...
Click to collapse
A NANDroid backup is a internal memory backup. You can create one by booting into Recovery (Power off your phone and Hold Power and Down on your volume buttons.) If you rooted your phone and unlocked your bootloader (that's what you had to do to flash a new kernel), you should be able to load ClockworkMod or TeamWin Recovery and do a backup of your phone.
Gnng said:
I prefer wait for stock JB Rom and probaby I'll , but, can I already find some JB ROM?
Click to expand...
Click to collapse
There's one rom but it's a port from the SDK and the amount of major bugs is high so it's not recommended but you could try another custom rom meanwhile, I can't go back to stock after trying custom roms, like AOKP and Cyanogenmod 9. Make sure you backup your apps and some settings (not everything will be compatible between stock and custom so pay close attention to which system setting you'll backup) with Titanium Backup.

To sum it all up for you
There's a Jelly Bean release which is unstable and has no sound, and will not be fixed until the REAL version comes out.
NANDroid backs up the whole internal memory on the phone including the system, it can be done from clockworkmod recovery.
Titanium backup, backs up specific settings and information that you choose, available from the playstore.
You don't need to unroot or go back to a STOCK kernel in order to flash a CUSTOM ROM. DO not however flash a STOCK rom after rooting, as at times that can cause problems.
If you want to go back to a STOCK ROM after rooting a device, there's a way, check this guide
http://forum.xda-developers.com/showthread.php?t=1063664
and choose your Nexus S model: To acquire model, go to Settings - About - Baseband version. if it says I9023 at the start that's your Nexus S's model
Choose one of the Fastboot Stock ROMs and use the Fastboot method to flash the ROM. That is a good way to go back to STOCK ROM if anything bad happens
By the way you should expect the new OTA official 4.1 update for the Nexus S to be on your model's page.
NOTE: Using Fastboot to flash a ROM is very clean. However this will delete all your data and if you do everything correctly will lock your bootloader and unroot your phone. So use Fastboot only when you really feel the need to.
Cheers
and stay tuned for Jelly Bean :victory:

andezzat said:
To sum it all up for you
You don't need to unroot or go back to a STOCK kernel in order to flash a CUSTOM ROM. DO not however flash a STOCK rom after rooting, as at times that can cause problems.
Click to expand...
Click to collapse
That means, when I receive the official 4.1 update notification, I should unroot my phone first and just install it after?

Gnng said:
That means, when I receive the official 4.1 update notification, I should unroot my phone first and just install it after?
Click to expand...
Click to collapse
OK first off, do not install the update using the system update method from about, as that is a 100% stuff up if you're still rooted or on a Custom ROM.
However to update I think flashing a stock ROM but USING Clockworkmod works fine!
Someone please confirm, as I am not 100% sure
However what I am sure about is that if you run into any troubles installing your STOCK ROM using Fastboot is very very good and clean, however there are 2 things:
1. You will wipe everything COMPLETELY
2. You need the ROM to be in a fastboot format kind of way for you to flash it
There's a guide and everything for fastboot.
---------- Post added at 12:35 AM ---------- Previous post was at 12:33 AM ----------
Personally I will wait for a custom ROM for 4.1 if it doesn't take too long as that's guaranteed and will obviously be faster and safer to install on a ROOTED device.
Someone still confirm if installing Stock ROM while over Custom ROM while ROOTED through CWM is OK or not!?

Hummm, ok...
I'm already using the Stock ROM, I just flashed a new kernel, and I prefer install the stock kernel and unroot my phone. Just to let it clean.
After I install the JB official update, maybe I flash and root again, depends of Google :laugh:
Do you know where can I download a trust official 4.0.4 kernel from the forums? My phone is a Nexus S I9020AUCKJ1, Version Number: IMM76D
Thanks!!!

Cant flash BAKED TF300T Blackbean rom anymore.

I would like to flash back the BAKED TF300T Blackbean rom. But after flashing sean's JellyBean-Hydro 1.4.6 i cant flash the rom anymore, i get stuck in Asus logo like many others. Im rooted and with unlocked bootloader. Im using TWRP JB version as Recovery now. Tried both CWM's also. CWM touch, wont make any difference. Normal CWM doesnt even work anymore.
I also played around with the fastboot and installed the stock WW30 (un-bootable), still cant flash the Blackbean. Is there currently anyway for me to flash it?
Hope i didnt forgot anything important to tell
Thanks

Heatti said:
I would like to flash back the BAKED TF300T Blackbean rom. But after flashing sean's JellyBean-Hydro 1.4.6 i cant flash the rom anymore, i get stuck in Asus logo like many others. Im rooted and with unlocked bootloader. Im using TWRP JB version as Recovery now. Tried both CWM's also. CWM touch, wont make any difference. Normal CWM doesnt even work anymore.
I also played around with the fastboot and installed the stock WW30 (un-bootable), still cant flash the Blackbean. Is there currently anyway for me to flash it?
Hope i didnt forgot anything important to tell
Thanks
Click to expand...
Click to collapse
No, there is no way to flash the older roms after JB update till now. You are stucked with Stock JB or hydro until the devs come out with a solution to downgrade to ICS

mikaole said:
No, there is no way to flash the older roms after JB update till now. You are stucked with Stock JB or hydro until the devs come out with a solution to downgrade to ICS
Click to expand...
Click to collapse
Okay, currently im trying to flash any other JB rom to try out, stuck on bootlogo almost everytime. Even the Hydro's re-flash did cause the stuck in logo.
EDIT: Ok, looks like im currently stuck in Asus logo and no system. I hope that the dev's can figure something out.

I was just wondering, aint the Blackbean Jelly Bean rom?
EDIT: Is it the JB bootloader causing that i cant boot into any rom i have flashed?

Heatti said:
I was just wondering, aint the Blackbean Jelly Bean rom?
EDIT: Is it the JB bootloader causing that i cant boot into any rom i have flashed?
Click to expand...
Click to collapse
Bkackbean and other custom jb roms are still using the ics kernel so until it's implemented on cm10 you can't flash after being on hydro or stock jb
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

Q- On CM9 w/ TWRP 2.2....can I flash to JB?

I have been using my tf300 since it came out and just using CM9. I never took an OTA update. Last version I was on was .29 with 4.04.
My question is...can I flash to a JB ROM with my current setup or do I need to flash a new recovery or get to JB bootloader etc?
I am way more knowledgeable with my phone and ROMs and I do no want to brick my tablet. I have read quite a bit but not sure what I should do.
Any help is appreciated. I'd like to ultimately flash CleanROM....
Sent from my SCH-I535 using XDA Premium HD app

Stashtrey said:
I have been using my tf300 since it came out and just using CM9. I never took an OTA update. Last version I was on was .29 with 4.04.
My question is...can I flash to a JB ROM with my current setup or do I need to flash a new recovery or get to JB bootloader etc?
I am way more knowledgeable with my phone and ROMs and I do no want to brick my tablet. I have read quite a bit but not sure what I should do.
Any help is appreciated. I'd like to ultimately flash CleanROM....
Click to expand...
Click to collapse
So just verify that you are in ICS bootloader (on your settings).
Are you unlock or not?
If you want to flash TWRP recovery ( for the moment, CWM have known issues), you must be unlocked.
Once you're unlocked,
Read the NVFLASH thread,
TWRP thread,
and finally, you can flash the rom that you want.
Click to my sig, and you will find all links for that

Easy Guide to Unlock, Root, and Flash ROM?

Hey guys, I just unlocked and flashed ROM on my LG Optimus G phone and looking to do the same with the TFT300T.
I did read some of the stickies, and there are various ways of doing this.
Anyone recently unlock, root, and install ROM on your TF300T? Which directions did you take? I am looking for the simplest and user friendly solutions. Any tips are much appreciated.
Thanks

What rom/ android version are you currently running?

I am on 4.2.1

First off you need to go to Asus support site and download the v8 unlock apk & run it (unlocking your bootloader).
Then have a good read here to learn how to flash the compatible TWRP custom recovery (2.4.4.0), the root your device.
As of know I don't know about any custom roms that will boot with the newest bootloader. Correct me if I'm wrong here.
Do have a good read though, and read it again - and make sure you understand it and then read some again. Then proceed by following the steps to the letter.
Have fun! :good:

Can I just download an older unlock apk if the current ROMs don't run with the v8 unlock?

No. If you updated to 4.2.1 you need to use the v8 apk.

Ti2 said:
No. If you updated to 4.2.1 you need to use the v8 apk.
Click to expand...
Click to collapse
Got it. So if I am on 4.2.1, there's no ROM that I can flash? Just want to get that absolutely correct.

Not that I'm aware of at this point. The new bootloader uses a different partition layout than the "older" 4.1 ones, so it will soft brick (as will flashing the wrong recovery, you'll want the latest twrp 2.4.4.0)

Thanks. That's really good to know.

So at this point, for anyone on the OTA 4.2.1, we can unlock and root but cannot install any kernels or ROMs yet, correct? Anyone know if CleanROM is being updated to work for us yet?

I think you can try this ROM.

Thanks, I had a look at that. I'm having a hard time figuring out which set of "instructions" to use. The ones on the OP:
Code:
Installation instructions:
- Unlock your device using the Asus supplied APK. Search around the forum for the official unlocking app.
- Install a custom recovery such as TWRP. Follow the instructions in the TWRP thread (website)
- Copy over the ROM zip to your Internal Storage or your microsd card
- Boot into recovery and simply install the ROM. This ROM will NOT wipe your current ROM settings
- Enjoy!
Or at the bottom of post #3 (where it seems to have the download links) it says "BEFORE YOU DOWNLOAD AND INSTALL ANYTHING IN THE JB 4.2.1 folder BELOW CLICK THIS LINK FOR INSTRUCTIONS AND WARNINGS!"
Which then gives you this set of instructions:
Code:
The stock ROM is uploading in the JB 4.2.1 subfolder of the main download folder on the first page..
Be warned that once you do this... you will not be able to simply restore your backup and go back to 4.1.1. You will need to flash the JB bootloader ( think craig gomez has a package for it) and repartition your tablet. So be ready to STAY on 4.2.1
Instructions:
1. Make a full backup of your internal storage and copy it over to your computer after. Do a "nandroid" or "backup" in TWRP and copy the resulting folder/files to your computer (if you want a backup...)
2. Download and copy the Energy_JB_4.2.1_Partitions.zip to your tab.
3. Reboot into recovery and flash the above mentioned file. Reboot.
4. Wait while the blue line at the bottom is doing its thing. At the top you should see a "signature match" message. This WILL WIPE YOUR INTERNAL STORAGE. Which is why I recommend a backup!
5. At this point the tablet will NOT boot. You need to manually reboot and get back into recovery. Hold power and volume down and choose "RCK".
6. Either using an sdcard or adb, copy over the actual ROM zip Energy.TF201.JB.03.15.2013.STOCK.zip and flash it! Reboot... and... Enjoy.
Having started on the OTA 4.2.1, I can't figure out what I need to do here. Do I require the Partitions.zip, or am I already set with that having installed 4.2.1 prior? Conflicting sets of instructions are bad...

Silas0220 said:
So at this point, for anyone on the OTA 4.2.1, we can unlock and root but cannot install any kernels or ROMs yet, correct? Anyone know if CleanROM is being updated to work for us yet?
Click to expand...
Click to collapse
Sbdags is working on it and has made some great progress. He's got it figured out where we are gonna be able to flash the bootloader, kernel, and custom recovery all at one time. From what I've read, I have a feeling a release is coming pretty soon.
Just keep up with the thread and you'll be good to go.
Sent from my LG-LG855 using Xparent SkyBlue Tapatalk 2

That sounds great. It was so much easier flashing my LGOG phone.
Sent from my LG-E970 using xda app-developers app

Following
Im posting because I want to keep up on this thread, I too have an ASUS TF300 with 4.2.1 and want to root it and install a custom ROM like I have on my Droid Razr.

I tried several ROMs and this was the only one I was able to get to work.

glamisldy said:
Im posting because I want to keep up on this thread, I too have an ASUS TF300 with 4.2.1 and want to root it and install a custom ROM like I have on my Droid Razr.
Click to expand...
Click to collapse
You too huh?
I need to get my bootloader unlocked...

Yeah, more of the same for my TF300T...
Silas0220 said:
Having started on the OTA 4.2.1, I can't figure out what I need to do here. Do I require the Partitions.zip, or am I already set with that having installed 4.2.1 prior? Conflicting sets of instructions are bad...
Click to expand...
Click to collapse
I have been having lag issues since the OTA upgrade to 4.2.1 and figured putting a custom ROM on the TF300T might help things out. Glad I came in here. I had unlocked it via the ASUS website: http://www.service.asus.com/#!downloads/c1wax

So what else can u do with unlock?
Sent from my LG-E970 using xda app-developers app

OTA but keep Root?

Hey im tryinna OTA update my One S its at Android Version 4.0.4 Sense 4.1 and i have an OTA ive had it for a while now. How could i update it and keep my root? Or if i install a higher version custom rom will it brick my phone?
Sent from my HTC VLE_U

Br00talBean said:
Hey im tryinna OTA update my One S its at Android Version 4.0.4 Sense 4.1 and i have an OTA ive had it for a while now. How could i update it and keep my root? Or if i install a higher version custom rom will it brick my phone?
Sent from my HTC VLE_U
Click to expand...
Click to collapse
not sure what you mean with your last sentence... but:
in my case the ota deleted my root. but I also recommend to do a factory reset after updating to 4.1 sense 4+, just to be sure that you have a clean jb rom (do titanium backups of your apps you wanna keep).
but you have to be on stock recovery if you want to apply the ota.
after your update you can root your phone again.
applying the ota wont have any effect on flashing a higher / newer custom rom.
you only have to be unlocked and on custom recovery. but you alawys have to flash the boot.img of the custom rom after flashing the custom rom zip.

NQNH said:
not sure what you mean with your last sentence... but:
in my case the ota deleted my root. but I also recommend to do a factory reset after updating to 4.1 sense 4+, just to be sure that you have a clean jb rom (do titanium backups of your apps you wanna keep).
but you have to be on stock recovery if you want to apply the ota.
after your update you can root your phone again.
applying the ota wont have any effect on flashing a higher / newer custom rom.
you only have to be unlocked and on custom recovery. but you alawys have to flash the boot.img of the custom rom after flashing the custom rom zip.
Click to expand...
Click to collapse
My bad i wasnt even payin attention to what i was typing and im still pretty much a noob at Root stuff so please bear with me lmao
Lets say i try to flash a 4.2.2. Rom even though im originally at 4.0.4. Would it brick my phone?
So would stock recovery be the stock rom i still hqve after rooting? I havent applied any custom roms at all since ive rooted
Sent from my HTC VLE_U

Br00talBean said:
My bad i wasnt even payin attention to what i was typing and im still pretty much a noob at Root stuff so please bear with me lmao
Lets say i try to flash a 4.2.2. Rom even though im originally at 4.0.4. Would it brick my phone?
So would stock recovery be the stock rom i still hqve after rooting? I havent applied any custom roms at all since ive rooted
Sent from my HTC VLE_U
Click to expand...
Click to collapse
the rom you want to flash doesnt care about your previous rom, because you wiped your previous rom.
so it really doesnt matter which rom you have before if you want to flash a new rom.
its like.. you have installed windows xp, then format your hdd and install windows 7, windows 7 doesnt take a --- about the old os
recovery and rom are two different parts.
you can stock recovery and custom rom, you can have custom recovery and custom rom, you can have stock recovery and stock rom.. blaaa

NQNH said:
the rom you want to flash doesnt care about your previous rom, because you wiped your previous rom.
so it really doesnt matter which rom you have before if you want to flash a new rom.
its like.. you have installed windows xp, then format your hdd and install windows 7, windows 7 doesnt take a --- about the old os
recovery and rom are two different parts.
you can stock recovery and custom rom, you can have custom recovery and custom rom, you can have stock recovery and stock rom.. blaaa
Click to expand...
Click to collapse
Oooh okay i get what youre saying. Soo recovery and the rom are two different things. I can upgrade to whatever gigher version i want. What about the OTA? If i upgrade to higher version custom rom will the OTA icon go away?
Sent from my HTC VLE_U

Br00talBean said:
Oooh okay i get what youre saying. Soo recovery and the rom are two different things. I can upgrade to whatever gigher version i want. What about the OTA? If i upgrade to higher version custom rom will the OTA icon go away?
Sent from my HTC VLE_U
Click to expand...
Click to collapse
after u have flashed a custom ROM, you wont get any OTA updates
Well, not from HTC anyways

Seraz007 said:
after u have flashed a custom ROM, you wont get any OTA updates
Well, not from HTC anyways
Click to expand...
Click to collapse
Oooooooh okay i get it now wow haha so custom rom updates are the OTA pretty much once its flashed on there?
Sent from my HTC VLE_U

Br00talBean said:
Oooooooh okay i get it now wow haha so custom rom updates are the OTA pretty much once its flashed on there?
Sent from my HTC VLE_U
Click to expand...
Click to collapse
well no
but u can update and then Root
That way you'll have the OTA radio and hboot and the custom ROM