Old kernel settings remain after full wipe stock rom flash. - Galaxy S II Q&A, Help & Troubleshooting

Hello to all...
First and foremost... I have been a long time xda site viewer and today is the first time I have registered to xda and bought the xda premium app to support this wonderful site.
I know the first rule is to search for answers, i tried searching but couldn't find it. Mine is a peculiar question that I hope can be resolved.
I have flashed my i9100 at least 50 over times. Flashing addict, you can say. Custom and stock roms. My typical routine is to do a full wipe:
1) remove sim and external sd, format usb storage under settings
2) enter cwm, wipe data/factory reset, wipe cache, wipe dalvik.
3) mount sd card, data, system...and format each of them
4) flash stock rom (KI3, 3 files version and repartition with. Pit). Repartition for a proper clean flash. I know some may disagree, so i have tried without it too.
5) flash cf-root, copy custom rom and perform steps 1-3 again. Except for wiping sdcard for obvious reasons.
6) flash custom rom and reboot, allowing 10 mins for software to sync in fully.
7) flash custom kernel of choice, current favourite being Neak kernel.
I have done this so many times i believe its the best to gauge the full potential of the custom rom, including battery life. I am really obsessive,. But I am patient enough.
However i just so happened to notice recently that after stock flash, i.e. After step 4 with stock kernel, i tried sliding the status bar for the brightness adjusting. To my surprise it works. Now that is not suppose to be the case. Especially after i have performed complete albeit unnecessary wipes. Someone please explain this phenomenon. Is the custom kernels 'hard encoding' our sgs2? If not is there another method of reformat that completely cleans your phone? I even tried ultimate Samsung cleaning script. Same thing.
Sorry for the long read. But I wanted to highlight this issue clearly for the experts here to discuss.
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Anyone?
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try this!
Hello, Before flashing any other kernel, please flash the Ultimate Kernel Cleaning Script,thats found here.. : http://forum.xda-developers.com/showthread.php?t=1363738&highlight=ultimate+kernel+cleaning+script
hope this solves your problem!

Thanks mate... I have tried it. But let me try it again with latest version. Which is better? Ultimate Samsung cleaning script or gblitz version?
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As long as you do one or the other .
But even without using a kernel x should overwrite kernel b .
jje

Great, but i do believe for the need for a proper kernel cleaning before installing a new kernel. As clearly illustrated by my example here. Funnily enough not many developers have picked up on this. Android is sure complicated in the hands of the experienced and noobs alike.
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Justinkumar said:
Great, but i do believe for the need for a proper kernel cleaning before installing a new kernel. As clearly illustrated by my example here. Funnily enough not many developers have picked up on this. Android is sure complicated in the hands of the experienced and noobs alike.
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
At least two kernel cleaners posted here for a very rarely posted problem that is usuall the user not following instructions .
Kernel cleaner is not required in normal use .
Flash kernel and it changes .
Use kernel cleaner is really to make sure none of the advanced settings remain otherwise not required and i would only use if changing custom kernels .My kernel count must be over 200 by now .
Android is sure complicated in the hands of the experienced and noobs alike.
Yep what is required is more FAQS and Guides for nobody to read .
jje

I thought so too, i normally use kernel cleaning scripts when i change roms or kernels. It's just that, sometimes i do not cause not many people here seem to talk about it.
I have yet to try it and reconfirm this theory of needing kernel cleaning scripts before flashing new roms with different kernels. Once I try it out, soon, i will post again. Then i think, developers out there should pick this up as part of their recommended steps for a full wipe or rather clean flash of a new kernel, esp if changing kernel.
Keep you guys posted... Thanks jje
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Hi guys,
Just to update anyone who has been reading this previously...
I have just reflashed to stock xwla4, the frankenstein version, i.e, stock kernel. With clean wipe/format, whatever you wanna call it, and still same results. Old kernel behaviour still present, i.e. Brightness adjustment via sliding status bar still present. I even reflashed a good 3 times with same stock rom, xwla4 (2times) and ki3. Also before each flash i also used ultimate Samsung cleaning script and the gblitz version. Still same issue. Can someone explain what is happening?
In case you are wondering, this is not a complaint thread but a hobby for to troubleshoot problems with our dear sgs2. So that we can all learn.
Thanks... Jk
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Justinkumar said:
Hi guys,
Just to update anyone who has been reading this previously...
I have just reflashed to stock xwla4, the frankenstein version, i.e, stock kernel. With clean wipe/format, whatever you wanna call it, and still same results. Old kernel behaviour still present, i.e. Brightness adjustment via sliding status bar still present. I even reflashed a good 3 times with same stock rom, xwla4 (2times) and ki3. Also before each flash i also used ultimate Samsung cleaning script and the gblitz version. Still same issue. Can someone explain what is happening?
In case you are wondering, this is not a complaint thread but a hobby for to troubleshoot problems with our dear sgs2. So that we can all learn.
Thanks... Jk
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
Sounds like the script cleaner will not work (see posts 177 through 179) with ICS custom kernels...

Justinkumar said:
Old kernel behaviour still present, i.e. Brightness adjustment via sliding status bar still present.
Click to expand...
Click to collapse
I'm a bit at a loss... why are you are NOT expecting this? I am on stock XXKI3 (2.3.5), and have never flashed anything newer, or a custom ROM. I've always had this behavior of adjusting the brightness via the status bar. As far as I know, I had it when I was on XWKE7 (2.3.3) as well.

ctomgee said:
I'm a bit at a loss... why are you are NOT expecting this? I am on stock XXKI3 (2.3.5), and have never flashed anything newer, or a custom ROM. I've always had this behavior of adjusting the brightness via the status bar. As far as I know, I had it when I was on XWKE7 (2.3.3) as well.
Click to expand...
Click to collapse
Ha... I was not aware that the brightness slider via status bar is part of stock behaviour. I always thought that it was introduced by custom kernels. Can someone else please confirm this. So we can put this issue to rest. If it's true then pardon me for my noobness. Thanks... Jk
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etotheo said:
Sounds like the script cleaner will not work (see posts 177 through 179) with ICS custom kernels...
Click to expand...
Click to collapse
I am talking about gingerbread. I will not transit to ICS till app developers have fully come to terms with it.
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Justinkumar said:
Ha... I was not aware that the brightness slider via status bar is part of stock behaviour. I always thought that it was introduced by custom kernels. Can someone else please confirm this. So we can put this issue to rest. If it's true then pardon me for my noobness. Thanks... Jk
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Click to expand...
Click to collapse
Dude, just google "Touchwiz brightness status bar".

My bad... Thanks guys for your support still. And you will get a thanks for that.
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Related

[Q] should i delete everything on my SGS2 if i want to put a ROM

and another question, i still can't update my software to ICS, i go to settings, about phone, updates, and it checks and then says no updates found
Use odin instead to update
Sent from my sgs2 running cm9 using xda app
what to do with odin? can you explain in more details, cuz really im noob at this
wrooney10 said:
what to do with odin? can you explain in more details, cuz really im noob at this
Click to expand...
Click to collapse
Hey mate maybe you should read this post 1st before you delete something on your S2:
http://forum.xda-developers.com/showthread.php?t=1125282
Cheers
Here & also Stickies.
You're going to have to do a lot of reading/learning. There are no shortcuts, taking shortcuts & not reading/learning leads to bricked phones.
i still didn't get answer to my first question do i need to delete all data on my phone to flash a new ROM??
If your on stock rom then no you don't.
i don't have any rom flashed now, but i'm thinking of miui or cyanogen, do i need to wipe all data or cache for this roms??
Follow whatever instructions these roms have to the letter & you should be fine. It isn't a case of do X regardless of whatever rom you're installing. Some roms have specific instructions.
Yea but its better when you always make a full wipe everytime you change your rom to minimize FCs (errors) but dont forget to back up all your datas and apps
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Needing help with Fluxii kernel

so i recently installed the rootbox aokp rom with the aroma launcher. i opted for the fluxi kernel instead of the siyrah kernel. im wanting to tweak it to get the most performance out of the kernel but im unsure of which settings to change in the xxtweaker app. it wont let me post to the actual thread since i havent made 10 posts yet. anyone got any advice?
Edit: problem resolved. thanks wonner for all your help.
Did you look at the 2nd post of Fluxi thread? http://forum.xda-developers.com/showpost.php?p=26350599&postcount=2
InfantryMarc said:
so i recently installed the rootbox aokp rom with the aroma launcher. i opted for the fluxi kernel instead of the siyrah kernel. im wanting to tweak it to get the most performance out of the kernel but im unsure of which settings to change in the xxtweaker app. it wont let me post to the actual thread since i havent made 10 posts yet. anyone got any advice?
Click to expand...
Click to collapse
Yeah, make some more posts.
Sent from my SGH-I777 using xda premium
yea i looked at that thread and that helped alot on some of the settings but the rest i couldnt find help on like tweaking the gpu and cpu to get maximum output. i currently have the cpu running at max of 1500 and min of 500. but i havent touched the voltage or any other settings other than setting the govenor to performance. the other settings get to be a bit confusing.
working on posting more. up to 8 now.
InfantryMarc said:
yea i looked at that thread and that helped alot on some of the settings but the rest i couldnt find help on like tweaking the gpu and cpu to get maximum output. i currently have the cpu running at max of 1500 and min of 500. but i havent touched the voltage or any other settings other than setting the govenor to performance. the other settings get to be a bit confusing.
working on posting more. up to 8 now.
Click to expand...
Click to collapse
Do not overclock unless you need to! Keep Max freq at 1.2 , seriously
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OK well now my call settings won't work. It will make calls but no sound comes out if the mic or speakers. Tried reinstalling zip and didn't fix it. Did a factory wipe and still no fix. How do I fix this?
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InfantryMarc said:
OK well now my call settings won't work. It will make calls but no sound comes out if the mic or speakers. Tried reinstalling zip and didn't fix it. Did a factory wipe and still no fix. How do I fix this?
Sent from my GT-I9100 using XDA
Click to expand...
Click to collapse
You'll probably get more exposure if u post in the fluxi thread. Just sayin.
Sent from my SGH-I777 using XDA
InfantryMarc said:
OK well now my call settings won't work. It will make calls but no sound comes out if the mic or speakers. Tried reinstalling zip and didn't fix it. Did a factory wipe and still no fix. How do I fix this?
Sent from my GT-I9100 using XDA
Click to expand...
Click to collapse
Something tells me you used the i9100 version instead of the i777 version.
Where is the i777 link? I'll have to completely unroot then root agaijncuz now its stuck on the galaxy s 2 load screen
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Make sure you read the OP thoroughly. http://forum.xda-developers.com/showthread.php?t=1664688
Can you get into recovery and reflash AOKP?
Is that the full root box aokp for i777? Or is it just the kernel?
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InfantryMarc said:
Is that the full root box aokp for i777? Or is it just the kernel?
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Click to expand...
Click to collapse
Full root box AOKP? I'm not sure what that is...just flash the entire AOKP ROM. It will flash over the i9100 Fluxii, then you can download and flash the correct version.
I downloaded the root box aokp rom which is what I thought was the i777 version. I'll re-download this version when I get back home.
Sent from my SGH-I897 using XDA
Are you talking about Task's AOKP? http://forum.xda-developers.com/showthread.php?t=1574718 If so, just reflash it in recovery. Reflashing AOKP uses Task's CM9 kernel and it'll overwrite the i9100 version of Fluxii you installed.
reflashed aokp rom. now im getting numerous process errors. android keyboard has stopped working, rom control has stopped, process.android.phone has stopped. have went into CWM recovery and re-installed zip and wiped davlik data, partition data. only other thing i havent done is factory reset. i even unrooted and re-rooted to get it back. now im getting the i-9100 boot logo with the yellow triangle.
Yikes. Did you happen to make a Nandroid before flashing? If not, you may have to return to stock. You also might want to get on IRC and try to get someone to help you real-time.
i just connected it to my computer, removed the other roms that i had and some other unneeded files, like the i9100 files, did a factory reset, re-installed the rom from recovery, reinstalled gapps. so far i havent gotten any process errors. still have the i9100 boot icon but i can fix that with the triangle away from the market. sucks that rootbox isnt going to be made for i777, i checked the thread and bajee confirmed he's only doing it for the i9100 or the s3. so im s.o.l on that. is there a way to get the fluxi kernel though? or is it stuck with whatever rom ur using?
InfantryMarc said:
is there a way to get the fluxi kernel though? or is it stuck with whatever rom ur using?
Click to expand...
Click to collapse
Um, how about going to the fluxi thread, downloading it, and flashing it? If you don't know this stuff, you shouldn't be flashing anything at all.
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i do know about flashing and using roms. but i dont know everything and id wager a bet that neither do u. all i asked was a simple question. not to have someone treat my question as if i asked why the sky was blue. i know about installing roms and such but not too keen on doing kernels. if i knew about it i wouldnt have asked the question now would i?
InfantryMarc said:
i do know about flashing and using roms. but i dont know everything and id wager a bet that neither do u. all i asked was a simple question. not to have someone treat my question as if i asked why the sky was blue. i know about installing roms and such but not too keen on doing kernels. if i knew about it i wouldnt have asked the question now would i?
Click to expand...
Click to collapse
You did ask a very simple question. And the very simple answer to your very simple question is readily available in the forum stickies.
If you think flashing kernels an flashing roms are completely separate processes, you don't understand as much as you think you do. Did you know that every time you flash a rom, you flash a kernel too?
And no, I don't know everything. But having knowledge isn't the key...the key is knowing how to acquire the knowledge you need.
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CUSTOM ROM guide needed

Hi,
I have been away for a long time here. Been using checkromhd v6 since then. This is a GB rom.
I thought maybe its time to get me a new rom.
I come here and see al these new features : mali, vsync, aroma, dualboot .....
Isn't there a romguide or something? Because this all is getting very difficult.
On gingerbread I think it was easier.
There where lesser option which made it easier to choose. There where also fewer cooks for the SGS2 back then.
If anybody can help me a bit coming up to speed with al this new stuff, I would be very thankfull.
EJ
The Netherlands
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Hey.it's always be guide how to install Rom in these topics...
Send form Galaxy S2. Using XDA Premium
The stickies in the general section have guides to everything right from upgrading from GB to ICS and rooting,dual booting, flashing, etc.
Only thing missing there is details on the latest updates on cm10 and build 4. In brief, the roms based on these two will not run on earlier kernel versions..coz of the new Mali drivers you mentioned.
Aroma basically makes installing a ROM simpler with the help of a GUI. kinda like the installation wizard you have on windows PCs.
Have a look through the stickies (especially the one on the emmc brick bug) and if you have any questions..always happy to help as best I can.
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efjbdejong said:
Hi,
I have been away for a long time here. Been using checkromhd v6 since then. This is a GB rom.
I thought maybe its time to get me a new rom.
I come here and see al these new features : mali, vsync, aroma, dualboot .....
Isn't there a romguide or something? Because this all is getting very difficult.
On gingerbread I think it was easier.
There where lesser option which made it easier to choose. There where also fewer cooks for the SGS2 back then.
If anybody can help me a bit coming up to speed with al this new stuff, I would be very thankfull.
EJ
The Netherlands
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
Everything is pretty scattered even for people who are sort of on the lookout and have tried various newer ROMs.
Dualboot is a feature in custom kernels, at least Siyah that I know of, where you can have more than one ROM installed and choose at boot time which one to use. I gather that its mostly useful for people wanting to try the experimental builds of Jelly Bean and have a stable Ice Cream Sandwhich.
Aroma is an installer which is sort of a second step after a CWM flash, and before an install, and allows you to choose via checkboxes which extra options you might want. This is up to the ROM maker as for what selections you might have. Examples are sometimes which kernel, which Samsung apps that aren't included in the ROM, etc.
I don't know what mali and vsync are but I would guess that vsync has something to do with graphics and maybe with the experimental Jelly Bean builds.
The only really important thing I can thing of is, as always, to do a nandroid backup before starting anything and possibly since you have Gingerbread you might need an older Kernel on hand with older CWM for a recovery back to Gingerbread... This needs to be addressed by someone who can clarify and it might also be necisarry to flash a newer kernel and CWM that will allow you to enter a recovery mode that will be compatible with newer ROMs but I don't know if this is the case or not. Again, this needs to be addressed by someone more helpful.
More important than the above is that, since you've apparently been out of the loop for a while, there's been a bug that can render a hard brick on some devices depending on various hardware components and the version of CWM used for flashing. There's a sticky thread about this but the safest thing way to go about it, as I understand, is to just not flash a 4.04 ROM but use a 4.03 one. I've used both and prefered the options available in 4.03, for my needs, as far as mods go.
Also, as for Jkay's work, some ROMs incorporate that and some incorporate similar features but aren't near as feature rich. As with Gingerbread there's only so many ROMs that he's done the work for and it now requires not just flashing of a framework, as was in Gingerbread, but purchase of the app from Google Play that will allow you to customize the settings. The thread is here http://forum.xda-developers.com/showthread.php?t=1667846
As for theming, its easier to choose a ROM that has it done already and is compatable with Jkay's framwork (assuming you want those things). You can, use a stock ROM, theme it, install Jkay's framework and it will work quite well but its more work. Vertimus themes are very popular but the site navigation is confusing and will definately be daunting. It would be necissary to read first before making any changes (themes or tweaks) deviating from initial setup. The easiest thing is just to choose something, assuming you want it, already themed and tweaked for Jkay's app to work in advance. Wanam builds seem pretty popular for this and as for the hard brick bug possibility with CWM on 4.04 ROMs, you can probably follow the current Wanam build download into his site and find his forum, search for a 4.0.3 ROM (LPG has played best with my particular handset) and make sure its for the SGSII as people often build for more than one phone and it would be a shame to flash an SGSIII ROM (or something else) on accident, for example.
My recommendation, in summary, is not to worry about dual booting or those other things for the moment, do nandroid backup if you intend to upgrade, find out if you need to have older CWM to downgrade (a flashable one at that in case you get stuck at a boot loop) or a newer one to upgrade, then keep it simple and choose an already themed and Jkay tweaked (you'lle have to buy the app) ROM that isn't a 4.0.4 build of Android, but 4.0.3, and to stay with Samsung based ROMs as a starting point. From there you can get a feel for for things and decide if you like the theming or if you want flash something else with stock Touchwiz, if dual booting is worth the trouble, and then bother to read about the other things you mentioned that I wasn't able to answer... so basically, keep the upgrade simple and then go from there and quite frankly if that means a stock upgrade to unmodified Samsung firmware then so be it.
If I backup my rom, cant I just restore it without worrying about the kernel?
Thanks all you guys for briefing me.
Thank you very much!!!!
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Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
EJ
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efjbdejong said:
If I backup my rom, cant I just restore it without worrying about the kernel?
Thanks all you guys for briefing me.
Thank you very much!!!!
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
it depends on the Kernel ma8 if its compatible with ur older rom then fine, else u will have issues in resotring the bkp
efjbdejong said:
Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
EJ
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
yes they all run on ICS and JB
efjbdejong said:
If I backup my rom, cant I just restore it without worrying about the kernel?
Click to expand...
Click to collapse
As far as I know, you can't restore a GB ROM on an ICS kernel and vice versa.
efjbdejong said:
Another thing. Obviously all my apps run on gb. Will they run on ICS to? Especially the gameloft games?
Click to expand...
Click to collapse
If they've been updated to run on ICS by the game devs..they will. You'd have yo check that out on the game's page. But since a factory reset is recommended when going from one android version to another you might not be able to save the app data..ie, current state of the game on GB and then resume on ICS.
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Ok thx again guys !!!!!!!
EJ
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If you want to restore you GB do that.
1.Flash GB stock Rom to your phone
2.Then search CWM recovery compatible to GB
3.If you found it flash it
4.then restore your backup
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Ok I checked and have this file " CF_ROOT_5_0_CWM.zip" on my phone. I also have different kernels ony phone which work with my current rom. This is enough to get me back to GB2.3.6 ?
What would the proces steps be if I am on an ICS rom and want to go back to GB?
Thanks in advance,
EJ
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I did writed now look in previous post
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Sorry we posted at the same time lol.
Ok so I just flash an original Samsung GB rom over the ICS custom rom? Then root it and restore my backup
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Yes.Do you have nandroid backup ? If yes. So you need to root it or use temporary cwm.
When you do that you can restore nandroid.
Send form Galaxy S2. Using XDA Premium
oh and another thing.. there still are some GB roms. If all you want to do is try another rom and prefer sticking to GB..you could look up this link
http://forum.xda-developers.com/showthread.php?t=1529173
All JB, ICS and GB ROMs for the i9100 are indexed here.
Thx.
I have a nandroid backup....
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Overclock kernel for i9300

This may be a really stupid question but I'm still learning
So after soft bricking my phone once today already I have now backed everything up so I don't have to redo everything when I undoubtedly mess something up again
I'm trying to overclock my s3 but I know I can't do this on the stock kernels, do I need to install a whole custom Rom or can I just use a custom kernel. If so how would I do this? Thanks
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DUBS73P said:
This may be a really stupid question but I'm still learning
So after soft bricking my phone once today already I have now backed everything up so I don't have to redo everything when I undoubtedly mess something up again
I'm trying to overclock my s3 but I know I can't do this on the stock kernels, do I need to install a whole custom Rom or can I just use a custom kernel. If so how would I do this? Thanks
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Hi, firstly if I was you I would read all of this: http://forum.xda-developers.com/showthread.php?t=1827635. This will explain about the dangers etc of overclocking on our specific device. Then, do you have a custom recovery installed? Like CWM? If you do and if you understand all the risks associated with overclocking, then you would look here: http://forum.xda-developers.com/showthread.php?t=1709686 This is siyha kernel, I trust this developer a lot, I have used his kernels ever since he first released one for the galaxy s2 a couple of years ago. You should read the full OP, and if you feel you are ready you just download the appropriate kernel zip, as in make sure it is for the galaxy s3. Also, make sure you flash the right kernel for your android version, like an ICS kernel will not work with a Jelly Bean rom and the other way round. Then simply flash it in Clockworkmod recovery and slowly and safely play around. I can't stress this enough, only play around with things after you fully understand what it is and does as overclocking can cause hardware damage. I hope this helps you
DUBS73P said:
This may be a really stupid question but I'm still learning
So after soft bricking my phone once today already I have now backed everything up so I don't have to redo everything when I undoubtedly mess something up again
I'm trying to overclock my s3 but I know I can't do this on the stock kernels, do I need to install a whole custom Rom or can I just use a custom kernel. If so how would I do this? Thanks
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
you can either install a custom rom or just root your stock kernel. I tried siyah kernel before, it support overclocking and dualboot.
danielsf said:
Hi, firstly if I was you I would read all of this: http://forum.xda-developers.com/showthread.php?t=1827635. This will explain about the dangers etc of overclocking on our specific device. Then, do you have a custom recovery installed? Like CWM? If you do and if you understand all the risks associated with overclocking, then you would look here: http://forum.xda-developers.com/showthread.php?t=1709686 This is siyha kernel, I trust this developer a lot, I have used his kernels ever since he first released one for the galaxy s2 a couple of years ago. You should read the full OP, and if you feel you are ready you just download the appropriate kernel zip, as in make sure it is for the galaxy s3. Also, make sure you flash the right kernel for your android version, like an ICS kernel will not work with a Jelly Bean rom and the other way round. Then simply flash it in Clockworkmod recovery and slowly and safely play around. I can't stress this enough, only play around with things after you fully understand what it is and does as overclocking can cause hardware damage. I hope this helps you
Click to expand...
Click to collapse
Hi thanks for all the information in you're post
I do have cwm recovery installed and I have created a android backup ready for my mistakes
What option do I use from within cwm? Is it the one that says install from zip or something? Thanks again
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DUBS73P said:
Hi thanks for all the information in you're post
I do have cwm recovery installed and I have created a android backup ready for my mistakes
What option do I use from within cwm? Is it the one that says install from zip or something? Thanks again
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Download your kernel of choice,boot recovery select install zip from sd card,navigate to where you downloaded your kernel,select it install it,now re-boot system.........job done enjoy
Sent from my GT-I9300
DUBS73P said:
This may be a really stupid question but I'm still learning
So after soft bricking my phone once today already I have now backed everything up so I don't have to redo everything when I undoubtedly mess something up again
I'm trying to overclock my s3 but I know I can't do this on the stock kernels, do I need to install a whole custom Rom or can I just use a custom kernel. If so how would I do this? Thanks
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Download Siyah kernel, the latest 1.7rc then flash it using Odin. Then you're good to go. Just read in general section. There's a guide by bala on how to OC/UV.
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[Q] Problems for flashaholics

Hi guys. I am a newbie for flashing ROMs. I have an international version of galaxy s2. I rooted it a couple months back with zip file in external SD and flashing it in stock recovery. I am currently running stock kernel,ROM version 4.1.2. Recently I came across many different ROMs and trying one by one. I have taken a nandroid backup of the stock ROM in case something goes wrong. What my question is that, will something happen to the phone hardware like motherboard or processor if I keep flashing ROMs repeatedly like twice or thrice in a week????? I don't want to lose my phone forever. I have tried 3 different ROMs in this week.
Thanks in advance. :good:
santhosh502 said:
Hi guys. I am a newbie for flashing ROMs. I have an international version of galaxy s2. I rooted it a couple months back with zip file in external SD and flashing it in stock recovery. I am currently running stock kernel,ROM version 4.1.2. Recently I came across many different ROMs and trying one by one. I have taken a nandroid backup of the stock ROM in case something goes wrong. What my question is that, will something happen to the phone hardware like motherboard or processor if I keep flashing ROMs repeatedly like twice or thrice in a week????? I don't want to lose my phone forever. I have tried 3 different ROMs in this week.
Thanks in advance. :good:
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Hahah you're safe mate, I've flashed 3 in a day once before. I don't always do that, but so far nothing has gone wrong :good: As long as you wipe properly in between ROMs you should be fine. I use a script (ROMNuke) by hawkerpaul here: http://forum.xda-developers.com/showthread.php?t=2100558
Basically flash that script in CWM and then immediately flash the new ROM. It cleans out all of the old rubbish from the new ROM so you get a completely fresh install of the new ROM, important if you flash a lot. Keep flashing till you find one you like! There's plenty of good ones
I think it depends on what you do with the ROM,if you over clock it change voltages etc ore don't follow a clean procedure when flashing new ROMs "full wipe" it may damage your device over time, this because some times when you flash another ROM if there are any leftovers of previous ROMs it may cause strange behavior on your phone like overheats,sudden reboots,sods,even brick the device
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Valholy said:
I think it depends on what you do with the ROM,if you over clock it change voltages etc ore don't follow a clean procedure when flashing new ROMs "full wipe" it may damage your device over time, this because some times when you flash another ROM if there are any leftovers of previous ROMs it may cause strange behavior on your phone like overheats,sudden reboots,sods,even brick the device
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I have used overclock CPU and GPU (graphics) and haven't had any problems. I currently only overclock GPU though, scrolling is smooooooth I've also mucked around quite a bit with the voltages, although undervolt/overvolt is probably not a good idea. I don't make a habit of changing voltages. Read this: http://forum.xda-developers.com/showpost.php?p=34153152&postcount=15576 if you plan on changing voltage settings. That post also talks about overclock, and according to it, overclocking is not recommended. That's the 'professional' stance if you like. I can tell you however that thousands of XDA users underclock/overclock/undervolt/overvault on a regular basis. Up to you if you want to go down that route.
OP like I said, use that script in between flashes and you'll be fine
Hopper8 said:
I have used overclock CPU and GPU (graphics) and haven't had any problems. I currently only overclock GPU though, scrolling is smooooooth I've also mucked around quite a bit with the voltages, although undervolt/overvolt is probably not a good idea. I don't make a habit of changing voltages. Read this: http://forum.xda-developers.com/showpost.php?p=34153152&postcount=15576 if you plan on changing voltage settings. That post also talks about overclock, and according to it, overclocking is not recommended. That's the 'professional' stance if you like. I can tell you however that thousands of XDA users underclock/overclock/undervolt/overvault on a regular basis. Up to you if you want to go down that route.
OP like I said, use that script in between flashes and you'll be fine
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Overclocking CPU can decrease FPS . In NenaMark decreased with 0,8...
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Hopper8 said:
Hahah you're safe mate, I've flashed 3 in a day once before. I don't always do that, but so far nothing has gone wrong :good: As long as you wipe properly in between ROMs you should be fine. I use a script (ROMNuke) by hawkerpaul here: http://forum.xda-developers.com/showthread.php?t=2100558
Basically flash that script in CWM and then immediately flash the new ROM. It cleans out all of the old rubbish from the new ROM so you get a completely fresh install of the new ROM, important if you flash a lot. Keep flashing till you find one you like! There's plenty of good ones
Click to expand...
Click to collapse
Thanks bro:good: link's definitely useful.

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