Hello there
I recently rooted my s5830i and installed a custom ROM.
All good but i was not satisfied with the rom and decided to restore to stock using the CWN backup.
My problem is that i still have the custom Kernel from Rafael Baugis installed and I want to restore stock Kernel
I searched the forums and can`t find a full tutorial on how to do this only bits and pieces that are not very useful.
If someone can tell me the exact steps on how to restore stock kernel it would be good.
Thanks in advance !
You need to flash to stock thru odin.
There are a lot of tutorials out there on XDA - use the search (start using it now will help you later, if you'll get more problems )
As I said I searched the forums but didn`t find a complete tutorial on how to restore stock Kernel....
Then you didnt searched good enough...
http://forum.xda-developers.com/showthread.php?t=1840645
it's even a sticky thread on the android section..
thank you :good:
Wait, what do you want the stock kernel back? It have a major problem? Because I want to install that custom kernel on the stock Rom without messing up and actually can't make it boot; so what custom Rom you installed before?
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here for 2.6.35.7 kernel !
Related
Is it ok to flash a custom kernel on top of another custom kernel?
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You dont need to revert on the original one before flash another custom. But you need to format dalvik cache and cache in recovery before flashing or you probably have a bootloop.
I suggest to make a backup of the rom in recovery, so If something goes wrong you can enter recovery and have the latest known working rom back in 2 minutes.
Please note flashing kernels always have a very small chance to corrupt your efs partition, its suggested to backup your efs folder before start play with roms and kernels. How to backup the efs, use the search tool of the forum
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rembrandtlnx said:
You dont need to revert on the original one before flash another custom. But you need to format dalvik cache and cache in recovery before flashing or you probably have a bootloop.
I suggest to make a backup of the rom in recovery, so If something goes wrong you can enter recovery and have the latest known working rom back in 2 minutes.
Please note flashing kernels always have a very small chance to corrupt your efs partition, its suggested to backup your efs folder before start play with roms and kernels. How to backup the efs, use the search tool of the forum
Sent from my GT-I9100 using Tapatalk
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Click to collapse
Thanks for that. I know how to backup efs. Can i just use nitrality instead of ADB? To flash ROMs does it need to be in a specific firmware like sgsl or is it ok to have different firmware from the base of a custom rom?
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I know my english sux sry:
Depends on the kernel but usually it is listed in the kernel thread the how to (odin or clockworkmod), clockworkmode is already on your phone if you rooted it with cf-root.
Now, to enter clockworkmod recovery, just push volume up + home + power button until the S2 bootlogo appears, then wait few seconds.
About the kernel type, i always flashed any kernel despite of my baseband, the difference is not so big.
if something is not working, you can always youse the nandroid backup (the backup done with the recovery cwm (up+home+power) and get back to the previous rom with previous kernel.
Im not really in the kernel "how to" someone else can prolly give you more detailed info, but as for me, i flashed ninphetamine 2.05 and 2.1.3 in cwm and it worked.
But.. as always, the kernel developers got a how to install in their kernel thread, so just read those and be sure about if you need odin or clockworkmod, if you are not sure, DONT flash anything until you are sure on how to proceed or wich system to use for flashing, better keep an old kernel with a working phone than have a brick to hold the papers
PS: also almost all the roms on the S2 forum are flashable with the clockworkmod, only few (like the lite'ning) are flashable with odin.
Again, i know im boring, dont proceed if you are not sure, better ask 10 times instead brick your phone
ephraim033 said:
Is it ok to flash a custom kernel on top of another custom kernel?
Yes not a problem flash as per the custom kernel instructions .
Kernel can be changed within an individual firmware or custom rom .
jje
Click to expand...
Click to collapse
Thanks for the reply guys. Coming back to my second question. What if i have KF1 and the rom i want to flash has a base of KI3, should i flash to stock KI3 first before flashing the custom rom or is it ok to flash a KI3 custom rom without flashing first to stock KI3?
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The custom rom first, the kernel after.
I got the habbit to boot succesfully at least once the custom rom. If everything is ok i then flash the kernel. Better do 1 task at time.
You can decide to try the rom without change the kernel..and try a different one if you experience battery drain or other problems.
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If i am on KH3 and want to flash a custom rom based on KI4 then i would flash stock KI4 and KI4 root first .
Custom rom flashed i will often try a different kernel later .
jje
from my experience
I have found that when i upgraded rom from gingerbread to ics that most custom kernals work with these roms ie now running with xxlpw ics (from gingerbread) with xwlp7 kernal. from what i have read on other posts and threads i could swap kernal to siya or any other as the mega good developers have made them (hotswappable) interchangeable as previous reply said swapping kernal might give you better battery or solve overheat probs.
Eg iwas running darkys rom with siya kernal v?something my phone rocketed temp in short time so i swapped kernal for an up to date one (could have used older one) it solved problem.
Anyone feel free to correct explination im still learning too lol
linuxnubee said:
I have found that when i upgraded rom from gingerbread to ics that most custom kernals work with these roms ie now running with xxlpw ics (from gingerbread) with xwlp7 kernal. from what i have read on other posts and threads i could swap kernal to siya or any other as the mega good developers have made them (hotswappable) interchangeable as previous reply said swapping kernal might give you better battery or solve overheat probs.
Eg iwas running darkys rom with siya kernal v?something my phone rocketed temp in short time so i swapped kernal for an up to date one (could have used older one) it solved problem.
Anyone feel free to correct explination im still learning too lol
Click to expand...
Click to collapse
I'll just point out this thread was dead since Sept 30 before you posted...
Hi!
I'm a total noob. This is my first android phone. I've read everything about rooting, and I'd like to install a custom rom, but I'd like to save the stock rom/kernel first. I've found this topic: http://forum.xda-developers.com/showthread.php?t=1075278
I don't really know if these are what I need. Also, I have an xwkf3 device, but it's slightly branded for hungarian T-mobile (the browser has a different name and icon, and it also had every network setting by default).
So, basically I either need someone to tell me which one to download, or better yet, how to create a backup of the whole thing.
Yet again, I'm sorry for asking something probably really stupid. I've tried to google it many times, but I failed to find an answer. Thanks for everyone in advance.
Are you rooted already? If so just boot into ClockworkMod recovery (cwm) and then navigate to backup. (navigate using volume buttons and use home to select)
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Here is the kernel rooting thread.
http://forum.xda-developers.com/showthread.php?t=1103399
Dial *#1234# into the phone dialer to find out what firmware you have installed.
Root using chainfires method and make a full backup via CWM.
Flash away. But make sure the Rom/firmware is for your device. Eg i9100 international.
Good luck.
Sent from my GT-I9100 using XDA App
I'm not rooted yet. If I understood everything correctly, the safe kernel is the same for branded/unbranded devices, and only the rom is different?
I'm currently downloading both secure and insecure kernels. After rooting, can I revert back to the secure one to install custom roms?
BTW, thank you for your quick answer
Beco.91 said:
I'm not rooted yet. If I understood everything correctly, the safe kernel is the same for branded/unbranded devices, and only the rom is different?
I'm currently downloading both secure and insecure kernels. After rooting, can I revert back to the secure one to install custom roms?
BTW, thank you for your quick answer
Click to expand...
Click to collapse
I'm not positive but I think if you are rooted and install a stock kernel (without root) you will lose root and won't be able to flash custom roms or make Backups. Its really easy to root, just find the appropriate insecure kernel, flash it with Odin, make backup, and then try new roms!
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King Shady said:
I'm not positive but I think if you are rooted and install a stock kernel (without root) you will lose root and won't be able to flash custom roms or make Backups. Its really easy to root, just find the appropriate insecure kernel, flash it with Odin, make backup, and then try new roms!
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Click to collapse
Don't flash back to stock kernel.
Use a jig if you want to get rid of the yellow triangle.
Edit: after flashing one of the cfroot kernels make sure you can get into CWM recovery mode. Vol up+power+home
If you can then you're ok to follow the instructions of the Rom you want to flash.
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Thank you. One last question, if I may. Some of the roms I'd try use different kernels, then mine. If I install one of those, and want to revert the phone to factory rom, and kernel, should I root it again with an insecure kernel according to the rom, or one according to my device's current, factory rom?
You will probably find that the Rom kernel will be rooted and have CWM. Just check in the 1st post or 2 of the roms thread.
If you use CWM and make a backup of your stock Rom, after you root now but before you flash any other Rom, you can restore with CWM to get back to stock firmware.
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Beco.91 said:
Thank you. One last question, if I may. Some of the roms I'd try use different kernels, then mine. If I install one of those, and want to revert the phone to factory rom, and kernel, should I root it again with an insecure kernel according to the rom, or one according to my device's current, factory rom?
Click to expand...
Click to collapse
To fully return to stock you have to flash a stock rom and stock kernel from Odin. The rom that you want to back up will be a stock rom but it will be rooted because of the rooted kernel. So yea, flashing stock firmware and kernel is the only way to get back to fully stock.
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But if I restore my backup rom, and flash it with an original kernel, it would be unrooted, and basically the phoen would be just as it is right now. Is that right?
bck
hi i have the same problem i want to root my gt 2 p5110 but i have to come back at the original values before june and can't loos the warranty....can you help me?
hi guys,
i'm new here so i don't know how everything works,so i could use some help.. i've recently rooted my phone using CF-ROOT 5.0 XWKJ1 and i'm a bit confused what to do now.. i wan't my phone to run on newest stock firmware, which one should I use ? the most recent one in intratech thread is XWLA4 (phone is XXKI4,just like mine,so it is for my phone or what does it mean? ), can I just flash it to the phone ? can i do it through CWManager app ? and i still don't entirely understand the difference between Kernel and ROM, I'd also like to try the cyanogen mod,what should I do first ? and how can I flash back original stock rom ? because cyanogen is 100mb and original rom is 8, so I'm not sure if it will restore the phone to the stock state after flashing stock rom back.. and yes, I've read the guide to GalaxyS2 and Android,but still do not understand everything..
thank you guys for your effort.
amozonesk said:
hi guys,
i'm new here so i don't know how everything works,so i could use some help.. i've recently rooted my phone using CF-ROOT 5.0 XWKJ1 and i'm a bit confused what to do now.. i wan't my phone to run on newest stock firmware, which one should I use ? the most recent one in intratech thread is XWLA4 (phone is XXKI4,just like mine,so it is for my phone or what does it mean? ), can I just flash it to the phone ? can i do it through CWManager app ? and i still don't entirely understand the difference between Kernel and ROM, I'd also like to try the cyanogen mod,what should I do first ? and how can I flash back original stock rom ? because cyanogen is 100mb and original rom is 8, so I'm not sure if it will restore the phone to the stock state after flashing stock rom back.. and yes, I've read the guide to GalaxyS2 and Android,but still do not understand everything..
thank you guys for your effort.
Click to expand...
Click to collapse
You need to start reading the guides your questions are all answered in the relevant guides .
You want CM you follow the instructions for CM you want xxx you follow the instructions .
ROM is firmware kernel is part of the firmware that interfaces OS and Hardware .
But suggestion is to wait for release of ICS .
jje
Take time out to read the guides as it'll help you out.
XDA is a development forum and requires leg work!
Not only that it'll stop you joining the many others in "I haz a brick"
Thread closed.
Sent from the valley of the shadows....
So there has been a lack of relevant threads that explain my topic issue for me so I have decided to make one for myself and for others in the event that this happens. So right now I am using RemICS-UX 4.0.4 but I wanted to use Eng-matts ergybit 2.3 rom, because I am traveling and I need video calling from skype, but when I tried to flash this rom with odin, instal via cwm it goes into a bootloop. I also tried to flash Ruebens Lewa os since it uses gingerbread as a base, then I tried to acquire the ROM again but I git a bootloop. Sadly I didnt back up my stock rom, so I'm trying to find away to get back to the stock rom so I can fladh eng matts rom again.
So if anyone has anyway for me to get to my stock rom please help
My device is the sgp 5.0 international
ypg70-cw/ttt
thanks
wtfsaywat said:
So there has been a lack of relevant threads that explain my topic issue for me so I have decided to make one for myself and for others in the event that this happens. So right now I am using RemICS-UX 4.0.4 but I wanted to use Eng-matts ergybit 2.3 rom, because I am traveling and I need video calling from skype, but when I tried to flash this rom with odin, instal via cwm it goes into a bootloop. I also tried to flash Ruebens Lewa os since it uses gingerbread as a base, then I tried to acquire the ROM again but I git a bootloop. Sadly I didnt back up my stock rom, so I'm trying to find away to get back to the stock rom so I can fladh eng matts rom again.
So if anyone has anyway for me to get to my stock rom please help
My device is the sgp 5.0 international
ypg70-cw/ttt
thanks
Click to expand...
Click to collapse
You need to install rj kernel if you have an intl device and entropy kernel for usa device . After you install the kernel you can flash erygit rom. Just replace the kernel
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maybe you should flash the rom again with cwm and if you get a bootloop just reset factory/cache works for me : )
Go into CWM Recovery (if possible) and flash rumirand r14 kernel and flash a new ROM.
Suggestion: Next time flash a ROM via CWM Recovery, ODIN flashing is easier to brick than CWM, CWM is very safe and you can always reset the bootmode if you're stuck somewhere!
Thanks guys
Sent from my YP-G70 using XDA
Hello and Good Day Devs !
I am kind of a newbie in the world of rooting (for samsung galaxy s2 gt i9100). So i just recently got my dad's permission to root and flash a custom rom on my device . I am currently using a samsung galaxy s2 gt-i9100 running jelly bean 4.1.2 XWLST . Am from India and i am highly confused. So i would like to know which kernel would be the best for rooting my phone (best i.e. safe , bugless) After rooting i am planning to flash a custom rom. I would Most probably flash the PACman ROm (jelly bean 4.2.2) and would like to know which kernel would suit the rom. rather i would like to know which kernel is supported by the PACman rom. i searched and read a few threads and concluded that siyah is a bit buggy causing a lot of problems . Philz is a good kernel but i also read that PhilZ's kernel is not supported by a few roms. I also checked out the 'jeboo" kernel and found out that it was somehow related to the PHilZ kernel and eventually backed out . So pease help me out devs .. any help would be appreciated and thanks a lot for your co-operation :laugh:
Whatever kernel you flash will be overwritten when you flash your custom rom.......every custom rom comes with its own kernel......
So the choice is yours......
Select your kernel and flash it however the instructions say, then flash your custom rom.....job done.....no issues/worries about incompatiability........
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flasherruts said:
Hello and Good Day Devs !
I am kind of a newbie in the world of rooting (for samsung galaxy s2 gt i9100). So i just recently got my dad's permission to root and flash a custom rom on my device . I am currently using a samsung galaxy s2 gt-i9100 running jelly bean 4.1.2 XWLST . Am from India and i am highly confused. So i would like to know which kernel would be the best for rooting my phone (best i.e. safe , bugless) After rooting i am planning to flash a custom rom. I would Most probably flash the PACman ROm (jelly bean 4.2.2) and would like to know which kernel would suit the rom. rather i would like to know which kernel is supported by the PACman rom. i searched and read a few threads and concluded that siyah is a bit buggy causing a lot of problems . Philz is a good kernel but i also read that PhilZ's kernel is not supported by a few roms. I also checked out the 'jeboo" kernel and found out that it was somehow related to the PHilZ kernel and eventually backed out . So pease help me out devs .. any help would be appreciated and thanks a lot for your co-operation :laugh:
Click to expand...
Click to collapse
start with siyah kernel v6.0b5
It is the safest kernel to start with
Then flash pacman
It is your choice to flash a new kernel over the stock pacman kernel
You can flash whatever custom kernel you like and as @keithross39 mentioned dont worry about incompatibility
Use odin
Gud luck mate
The only time you have to think about kernel compatiability is if you decide to flash a kernel on top of your custom rom. As I previously mentioned, the kernel you flash to root your phone will be overwritten when you flash the rom, so no incompatiability will exist because you will have basically erased that kernel during the flash. But any kernel you flash on top of your new rom HAS to be compatiable or you'll end up with an unuseable phone......
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Thanks A lot devs . I will now root my phone and flash the rom ! thanks a lot for your help!