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I am new to the nexus s , but have been a heavy galaxy s user. I noticed that flashing roms etc is a bit different from what I am used to on my galaxy s .. I did not see any thread containing stock kernels ... So how can I return to stock after I have flashed another kernel ? I have installed the voodoo kernel with ext4, sound and colour enhancement .. But suppose I want to return to my stock gri54 kernel , how can I do that ? Have read allready about fastboot etc etc but then I should have an .img of the stock kernel , correct ?
By flashing back to stock rom, you will get back your stock kernel automatically.
Sent from my Nexus S using Tapatalk
navlem said:
By flashing back to stock rom, you will get back your stock kernel automatically.
Sent from my Nexus S using Tapatalk
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So by flashing back to stock ROM via recovery, does it mean that it will be locked and un-rooted as factory default [like when you first purchase the device]?
navlem said:
By flashing back to stock rom, you will get back your stock kernel automatically.
Sent from my Nexus S using Tapatalk
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But will i not loose everything if i do it like that? And where can i find stock rom. I only found an odin package
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johnkim0011 said:
So by flashing back to stock ROM via recovery, does it mean that it will be locked and un-rooted as factory default [like when you first purchase the device]?
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It will be unrooted, but still with unlocked bootloader.
Bandis710 said:
But will i not loose everything if i do it like that? And where can i find stock rom. I only found an odin package
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The Odin package can put you back to stock rom too.
So what you are saying there is no way to flash only the stock kernel ?? Very confusing .. I am able to flash just another kernel using fastboot but I am not able to flash back the stock kernel using fastboot ? Odin is a last resort method .. haven't seen fastboot .img files of the stock here in the forums ?
I'm not sure if anybody posted any stock kernel file in the forums. If there is any, you can easily download it and install via recovery or fastboot.
Otherwise you can only revert to stock roms because stock roms links are easily available through the forums or samsung firmware website.
Or after you have failed everything, may want to consider Odin. It seems to touch the phone at a lower level compare to other techniques.
follow the instruction on this
http://www.samfirmware.com/WEBPROTECT-i9023.htm
work great for me after all
Samsung i9023
Good luck
Yeah , I also mentioned odin allready .. Used it a lot when I had my galaxy s .. Just thought that since the nexus s can use fastboot I could get rid of odin ..
I am also not used that all has to be flashed to achieve a single goal .. On the galaxy s I could flash the kernel separately and also stcok kernel were easy to find .. I think it is kind of a hassle to reflash a whole rom just because you want stock kernel back ..
Voodoo has stated that his kernel is 'almost' stock, with only voodoo addon to the pure stock kernel. Maybe you can use that?
Some news here?
Hi there!
I was also wondering about this same situation. Let's say I want to stick with the original ROM and try some non-stock kernels. After some tests I know there is an OTA available but I don't want to backup and restore everything (using TB or similar). From what I understood I wouldn't be able to flash stock kernel (in other words, back to full stock ROM + Kernel) and apply OTA update...
What if we just flash boot.img from a nandroid of stock rom+kernel?
RM
Here you go: http://forum.xda-developers.com/showpost.php?p=20442919&postcount=3
Sent from my Nexus S using XDA App
Hoo great!
but, can you tell us where to find or how to get it from the stock ROM and make it flashable? It might be useful for upcoming releases of stock ROM/Kernels.
Thank you once again,
RM
edit: after searching by the filename you gently provided I found this:
hxxp://www.android-hilfe.de/2277361-post1.html
hxxp://www.michalurban.cz/Nexus_S_i9023/Kernel/
seems to be a good compilation, and stock is in the list!
The file I posted is already flashable through CWM. Just wipe dalvik first. Of course make sure you have a Nandroid backup just in case.
Hi,
sure, I noticed that. What I was wondering was how to get this flashable kernels. From the stock ROM full installation file? From a nandroid backup of a stock ROM??
RM
Hi, is any chance to get stock kernel for Jelly Bean 4.1.1? I've got stock rom, Air Kernel and OTA is buzzing me multiple times a day. No luck in upgrade, Error Status 7. I think it's Air Kernel's fault.
0mn1us said:
Hi, is any chance to get stock kernel for Jelly Bean 4.1.1? I've got stock rom, Air Kernel and OTA is buzzing me multiple times a day. No luck in upgrade, Error Status 7. I think it's Air Kernel's fault.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1572307
Flash factory. Easy.
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I wanna flash CM7 to try it out, but if i decide i don't like it can i restore a backup of H57?
Yes, as long as u first flash a tw kernal u should be fine
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wired-turtle said:
Yes, as long as u first flash a tw kernal u should be fine
Sent from my SCH-I500 using XDA Premium App
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If you use CWM3 it backs up your kernel and you shouldn't need to flash it separately.
Not to change the topic of the thread, but I've always had problems with flashing a different ROM and then trying to Nandroid restore back to the previous one... It always says my checksum is bad. Is this just something I'm doing wrong, or...?
ChromWolf said:
Not to change the topic of the thread, but I've always had problems with flashing a different ROM and then trying to Nandroid restore back to the previous one... It always says my checksum is bad. Is this just something I'm doing wrong, or...?
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Depends on what CWM you're using, I've had issues like that with 2.5.x but not with CWM3.0
ChromWolf said:
Not to change the topic of the thread, but I've always had problems with flashing a different ROM and then trying to Nandroid restore back to the previous one... It always says my checksum is bad. Is this just something I'm doing wrong, or...?
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Click to collapse
I believe that occurs when you create a backup with lagfix enabled then try to restore it with lagfix disabled, or vise versa. I could be wrong however.
Has anyone used times_infinitys flashable CWM3? Would that work to do a backup?
Sent from my SCH-I500
breastmilk69 said:
I believe that occurs when you create a backup with lagfix enabled then try to restore it with lagfix disabled, or vise versa. I could be wrong however.
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Actually, since (A) I've been running with MIUI (more to the point, an AOSP ROM), and (B) I've been flashing my phone lots lately, I haven't had lagfix enabled in a month or so. I *have* changed recoveries once or twice though.... I'll try running with a 3.0 recovery as bde suggests and see if that makes the difference. It'd really make Romdev a lot easier a process.
Wyman881 said:
Has anyone used times_infinitys flashable CWM3? Would that work to do a backup?
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Yes and yes.
I flashed it and tried making a backup, and it said error backing up boot image. What does this mean and what's wrong?
Sent from my SCH-I500
Wyman881 said:
I flashed it and tried making a backup, and it said error backing up boot image. What does this mean and what's wrong?
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The one packaged with H57 is fixed, there seems to be issues with other versions of CWM3, i don't think dfgas has packaged it up separately yet however...
Uhh dang it. What version is the recovery in? I'm on 5/7
Sent from my SCH-I500
Wyman881 said:
Uhh dang it. What version is the recovery in? I'm on 5/7
Sent from my SCH-I500
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On the main screen it should say 2.5.x or 3.0 - if you are using H57 you're on 3.0 (it hasn't changed any...) but it sounded to me like you went and flashed a different CWM (the one from times infinity is a little diff than the one dfgas built and put in the H57 rom)?
Yeah I flashed times_infinitys. When i flashed H57 it didn't flash CWM3.
Sent from my SCH-I500
I meant what version of the ROM is CWM3 in? Cause i flashed the 5/7 and it didn't have it.
Heinz 57 has its own version of cwm in it so when you flash heinz you will flash cwm too I believe. If you want to have times's cwm installed flash heinze in either cwm 2.5 or 3 then after you reboot. Go back in and flash times's version of cwm.
Tap-a-Talked
I just flashed Heinz recovery.
Sent from my SCH-I500
Just a question, what does an advanced restore do?
Sent from my SCH-I500
It lets you restore specific parts. Example. Your apps are stored in the data folder. In advanced restore you can select restore data and it will just restore that folder and sub folders
Tap-a-Talked
Ohh ok thanks. Another question, I just made a backup and it said it couldn't mount sd_ext? What does that mean
Sent from my SCH-I500
Just want to make sure if the nandroid backup & restore is really working on Sensation with latest CWM since I have made a bunch of backups and I am heavily messing around with the phone for the past 48 hours lol... Just to be sure this backups are going to actually work in case I screw the phone...
Sent from my rooted HTC Sensation 3.5G using XDA Premium App.
Yes.... Works great.
Sent from my HTC Sensation Z710e using XDA App
Do remember that clockwork /nandroid restore will not restore the kernel. If you flashed a rom that's using a custom kernel, you will need to flash the stock kernel before trying to restore your backup or you will get stuck in a boot-loop.
Thank you both! Just wanted to confirm!
Sent from my rooted HTC Sensation 3.5G using XDA Premium App.
how do i flash back to the original kernel?
Question. What was the total file size of the Backup (stock ROM)?
Sent from my HTC Sensation 4G using XDA Premium App
stanleynhan said:
how do i flash back to the original kernel?
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Yes, I'd love to know this along with how to get a copy of the original kernel....or is the kernel in the .zip files on the regional oem rom thread?
not working for me
You can find the stock kernel in the second post in the Android Revolution HD thread over in the development section.
Paging Dr B said:
You can find the stock kernel in the second post in the Android Revolution HD thread over in the development section.
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Nice find... Will keep a backup just in case... Thank you!
Sent from my HTC Inspire 3.5G using XDA Premium App with CM7.
Paging Dr B said:
Do remember that clockwork /nandroid restore will not restore the kernel. If you flashed a rom that's using a custom kernel, you will need to flash the stock kernel before trying to restore your backup or you will get stuck in a boot-loop.
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isnt the boot.img the kernel and init stuff? i was under the assumption it was backed up when you do a nandroid on most devices (like HTC). the RFS file system samsung uses on their devices prevented us from backing up and restoring a boot.img file so we have to always have a kernel in case of the good ol boot loop
so to go back to stock kernel, i install it to the sd card then flash it in recovery right?
stanleynhan said:
so to go back to stock kernel, i install it to the sd card then flash it in recovery right?
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Yeap... That's how you flash a kernel, but not needed if what you want to do is restore from a nandroid backup... To restore just select the nandroid backup you want to restore. No need to flash any kernel prior restoring from nandroid.
Sent from my rooted HTC Sensation 3.5G using XDA Premium App.
since when do you have to reflash a stock kernel in order to flash your backup? I have tried every rom out here for the sensation didn't like any of them and reflashed my backup of stock with no issues....
Paging Dr B said:
Do remember that clockwork /nandroid restore will not restore the kernel. If you flashed a rom that's using a custom kernel, you will need to flash the stock kernel before trying to restore your backup or you will get stuck in a boot-loop.
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Click to collapse
This is not true. Nandroid contains the kernel image.
You would only have to flash a different kernel AFTER you restore, if you don't want to use the one that you backed up.
To the point, nandroid restore works perfect with 4.0.1.5 CWM. I confirm.
Getting mixed signals here guys. Does nandroid backup / restore the kernel?
jir591 said:
Getting mixed signals here guys. Does nandroid backup / restore the kernel?
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Click to collapse
Yes... Restore everything exactly when you back it up... Kernel and everything exactly.
Sent from my HTC Inspire 3.5G using XDA Premium App with CM7.
Nandroid is just the CWM backup? Or am I missing something?
Arsenal23 said:
Nandroid is just the CWM backup? Or am I missing something?
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Click to collapse
Yes... Is called nandroid...
Sent from my rooted HTC Sensation 3.5G using XDA Premium App.
so i finally decide to grow a pair and root.... how ever when i try to install device drivers it says program unexpectily quit and closes however when i open odin i get a yellow box on teh top that says com something.. i am asuming that is what i need to see in order to see the flash works properly.. second just want to flash a stock rooted rom do a backup and then flash gummy charged newest version with kernal how do i go about doing this want to make sure my i are dotted t's are crossed etc...
bfitzpatrickd2d said:
so i finally decide to grow a pair and root.... how ever when i try to install device drivers it says program unexpectily quit and closes however when i open odin i get a yellow box on teh top that says com something.. i am asuming that is what i need to see in order to see the flash works properly.. second just want to flash a stock rooted rom do a backup and then flash gummy charged newest version with kernal how do i go about doing this want to make sure my i are dotted t's are crossed etc...
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sounds like it's connecting fine.. and you described it right, flash the stock rom in Odin first and boot up to make sure it works or do some minor set-up, then flash the latest 8/17 CWM in Odin and immediately boot into it after, make the backup then flash whatever rom/kernel you want (Gummy 2.0 has one included and will enable voodoo lagfix on first boot)
not that hard once you do it once or twice and kinda learn how it all works and whatnot
do you. mind shooting me a download. link. of stock rom and cwm what about kernals do I need to. flash a kernal or is. that included in stock. rom as well as gummy charged
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what about wiping sd card want to do a clean wipe that is a safe thing as long I format as fat 32 correct?
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bfitzpatrickd2d said:
do you. mind shooting me a download. link. of stock rom and cwm what about kernals do I need to. flash a kernal or is. that included in stock. rom as well as gummy charged
Sent from my SCH-I510 using xda premium
Click to expand...
Click to collapse
CWM
http://forum.xda-developers.com/showthread.php?t=1112804
Stock (though not the latest as Gummy is based off the slightly older EP1W)
http://forum.xda-developers.com/showthread.php?t=1260214
Gummy 2.0/2.1
http://rootzwiki.com/topic/5643-romep1wcwmgummycharged-gbe-21-10242011/
GB Voodoo Lagfix Kernel (I'd recommend version 3.0.0+)
http://rootzwiki.com/topic/3426-kernel-gb-imoseyon-kernel-stock-repacked-v400-11611/
and no the stock rom does not include a custom voodoo kernel but the Gummy 2.0 package does so it will install the kernel and rom and enable voodoo lagfix on first boot (the Gummy rom package includes version 2.2.5 of that kernel I linked so it's a bit old, you can update it if you want by flashing the new one in CWM afterwards)
bfitzpatrickd2d said:
what about wiping sd card want to do a clean wipe that is a safe thing as long I format as fat 32 correct?
Sent from my SCH-I510 using xda premium
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Click to collapse
you don't really need to format the sd card as everything android related (not phone #'s or pictures or anything *you* put on there) will be wiped when you do the wipes in CWM
thanks man so. I am assuming I put. the. stock in the past. section wait. for. reboot. put. kernal in pda. reboot the put the cwm version in there
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and it doesn't matter what baseband I am on currently I just do what is listed above and thought about removing simple just to be safe
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bfitzpatrickd2d said:
thanks man so. I am assuming I put. the. stock in the past. section wait. for. reboot. put. kernal in pda. reboot the put the cwm version in there
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no no no stock rom in PDA first, boot up after the flash, power down and connect to Odin again and put CWM in PDA (everything goes in PDA) and flash then unplug phone after it passes and immediately boot into CWM no regular boot up.. then wipe data, dalvik (under advanced) and cache then flash Gummy or rom of your choice (custom rom build must match stock build like stock EP1W with EP1W Gummy 2.0), select reboot phone option and let the kernel activate voodoo lagfix when it boots up (may take a while)... once it starts you'll have a rooted voodoo custom rom, then you can hold the power button down until the reboot options menu comes up and select recovery to proceed to flash the updated kernel if you want
also the modems will be the ones installed with the stock rom, but you can flash new ones in Odin in the PDA section if you want
blazing through on my 4G Droid Charge
thanks man, normally not this causious but dont want to brick again someone linked a video so i will follow that.. sorry gor being a extreme noob ever thoigh im not
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bfitzpatrickd2d said:
thanks man, normally not this causious but dont want to brick again someone linked a video so i will follow that.. sorry gor being a extreme noob ever thoigh im not
Sent from my SCH-I510 using xda premium
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Click to collapse
lol no problem and yeah its better to be careful at first.. also that guy's videos are good I should've thought to recommend them
blazing through on my 4G Droid Charge
one question if your still around i hope so anyway about the cwm.tar or what ever it is there were a lot of people haveing soft brick and brick issues with this but there was a cwm ver 4.008 will this work all i want to do is flash gummy charged and that is about it.
bfitzpatrickd2d said:
one question if your still around i hope so anyway about the cwm.tar or what ever it is there were a lot of people haveing soft brick and brick issues with this but there was a cwm ver 4.008 will this work all i want to do is flash gummy charged and that is about it.
Click to expand...
Click to collapse
yeah that one will work fine, I use it since I don't do nandroid backups much.. I think there's a download link in the OP of that kernel thread at rootzwiki
blazing through on my 4G Droid Charge
sweet thanks
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last time i flashed a rom for some reason the stock. recovery overwrote. cwm anything that you know. of that i can do. to avoid this in future?
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bfitzpatrickd2d said:
last time i flashed a rom for some reason the stock. recovery overwrote. cwm anything that you know. of that i can do. to avoid this in future?
Sent from my SCH-I510 using xda premium
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probably because the rom didn't include a custom kernel or for whatever reason it didn't make it work.. flash or reflash a custom kernel and there won't be any more problems
blazing through on my 4G Droid Charge
So I'm about to flash a custom rom an I'm confused about flashing the roms an kernels. I'm already rooted and know to flash recovery via ez recovery. I plan on running Synergy. Is there anything else I should do prior to flashing roms, specifically synergy? I know these roms are built for the what was locked bootloader so do these roms just flash the stock kernel when you flash the rom? Thanks
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Boot into recovery and Make a backup of your current setup. Then wipe data and cache and dalvik. Then flash the Rom. If it asks you to skip or disable recovery flash upon trying to reboot click yes.
Thanks. Yeah I got all that but more concerned if I need to flash a kernel with the rom. I also here about backing up the IMEM or something like that.
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You don't need to flash a kernel with Synergy. Just flash the ROM (with proper backup and recovery of course)! You also don't need to worry about IMEI for now. There was a backup process with the efs partition, but people have just been rewriting it with QPST if they lose it. Have fun!
Bleelas said:
You don't need to flash a kernel with Synergy. Just flash the ROM (with proper backup and recovery of course)! You also don't need to worry about IMEI for now. There was a backup process with the efs partition, but people have just been rewriting it with QPST if they lose it. Have fun!
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Click to collapse
Thank you!
Sent from my SCH-I535 using xda app-developers app
No prob! Just for a little more information, you CAN backup your efs partition and restore it still, but the issues have been with AOSP ROMS. It probably a good idea to do it, but considering you're talking about Synergy and there's a way to rewrite it, you probably don't NEED to. Also, as far as flashing kernels, the ROM threads usually say if they also come with a kernel or not, whether they need kexec or not (soon a thing of the past!), and what kernels they are compatible with. Generally speaking, a TW ROM needs a TW kernel (like the stock kernel), and an AOSP ROM needs an AOSP kernel.
The last option to backup your IMEI is:
http://rootzwiki.com/topic/32397-tutorial-imei-backup-nv-with-qpst-us-variants/
I'd go ahead and do it and then you don't need to worry
All good information I've been exactly looking for lol. But yeah the whole kexec thing has really confused me.
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tu3218 said:
So I'm about to flash a custom rom an I'm confused about flashing the roms an kernels. I'm already rooted and know to flash recovery via ez recovery. I plan on running Synergy. Is there anything else I should do prior to flashing roms, specifically synergy? I know these roms are built for the what was locked bootloader so do these roms just flash the stock kernel when you flash the rom? Thanks
Sent from my SCH-I535 using xda app-developers app
Click to expand...
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Look in the developer forum for this phone, droidstyle did an amazing step by step for doing a few things for the sgs3
Sent from a Galaxy far, far away...