yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
1. 3rd party launchers are compatible (in general) with SN. (Nova for sure - I'm using it, Apex - should also work well)

2. Best method to backup 1st rom - for sure nandroid backup. Remember! if do any changes to 1st rom/flash new 1st rom make nandroid backup of your 2nd rom. Why? If you flash a stock TAR rom (via odin) to 1st rom you will loose /system partition of your 2nd rom (it will be overwritten by some temporary files). If you flash as 1st rom a custom rom from CWM recovery - everything should be OK.
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
Cheers:good:

If I flash a new ROM in position 1 and want to revert back do I have to locate and flash a copy of the original ROM (in my case stock ICS) using the Odin method first before then restoring my Nandroid backup or simply restore my Nandroid backup from within CWM (over the new modified ROM)?
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Simply restore your nandroid backup. Your 2nd rom should stay unchanged.
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
I mean if I want to restore my original stock ROM to position 1. Say I backup stock ROM in slot 1, flash a modded ROM in its place and then decide I want to swap back to the original stock ROM in position 1. Do I simply go to CWM and select my stock ICS backup or do I first have to manually flash the original ICS stock ROM using Odin and then resote my backup with CWM. Sorry for some many questions!
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
I understood you well. It's enough to restore your backup from CWM recovery.

However, ASAIK flashing stock via ODIN is required only if:

- you face some unexpected, unusual issues, when full wipe doeasn't help

- you would like to downgrade your rom for example to GB 2.x.x

Normally just restore your nandroind backup. That's it.
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
Excellent - thanks for the clarification.
[Galaxy S II Q&A, Help & Troubleshooting] StressSyndrom:
WOW, really many many many many thanks for your help and your support !!!

The Site from Siyah Kernel is down ... :(

& i have to say something you have to know it.

i tried few days ago AND yesterday the cMIUI ROM, unfortunately had that problem, that he stucks on loading screen, he always hung on the loading screen, the ROM was flashed it has rebooted but after s2 logo on THIS screen ( THE LAST SCREEN ) it stucks ... although I followed the installation

and that 4 or 5 times ... how can I fix the problem?
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
Did you follow Many's instructions to the letter? I had the same issue (hanging on splash screen) the first time I tried to flash Super Nexus but tried again and it worked.

---------- Post added at 05:46 PM ---------- Previous post was at 04:54 PM ----------

Many40 - I set Nova up to behave how I want. I then check an email (for example) and when I exit the email app Nova has stopped and I am looking at my stock screen. I then have to manually open Nova to get my set up back. Any ideas?
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Have never used stock email app. Have you tried with other email apps eg Gmail? Is it the same?
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
So far I have only seen it reset itself when exiting the stock email app which I need to access exchange for my work email. I'll continue to play and see if I can get it to do it with other apps.
[Galaxy S II Q&A, Help & Troubleshooting] StressSyndrom:
yeah, i did it today 3 times still stuck on the cMIUI loading screen ....
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Strange I rechecked that on cMIUI thread and some guys use already Siyah 5.0.1 without any issues.

When you get stuck on the splash screen - did you try just rebooting the phone to allow cMIUI to boot again?
[Galaxy S II Q&A, Help & Troubleshooting] StressSyndrom:
yeah .. and still stuck, today again 2 times, im tired of that now .. wont work, so its okay i waited for like 4 hours !!! at the loading screen of cMIUI but fine he wont work, got at the moment RootBOX 1.8, works well & can i add icons btw to change with included apex launcher, can i change icons ? or install some icon packs ? how ?

---------- Post added at 02:36 AM ---------- Previous post was at 02:34 AM ----------

This looks pretty nice ...

http://tapatalk.com/mu/bcdfc8d4-eb7c-d7e2.jpg
[Galaxy S II Q&A, Help & Troubleshooting] StonedEcstasy:
Wrong thread! There are videos all over on how to do that, go figure it out. GIYF.
[Galaxy S II Q&A, Help & Troubleshooting] redchris:
I gave up on Nova as it would randomly stop working and require relaunching regularly for some strange reason. There didn't seem to be any consistency to this - it happened after exiting email, google now, music player. If anyone else has had similar issues I can report the Apex launcher is working without any issues.
[Galaxy S II Q&A, Help & Troubleshooting] timberwolf60:
Nova launcher worked for me without any problem with siyah kernel. Now I was on xxlsj Samsung xxlwj jelly bean and no dual boot at the moment. Waiting for gokhanmoral to release s new kernel. Yet I still using Nova launcher.

Send via my GT I9100 using Tapatalk2,

1st ROM Sammy xxlsj JB 4.1.2

Waiting for new Siyah kernel, SuperSU pro
[Galaxy S II Q&A, Help & Troubleshooting] dracula8275:
Hi friends,

I'm using v. 4.1.5 and tryed to remove second rom, when i tried to flash a new one there is an error wipping data. What files can i delete using my primary rom?

Thank you
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Hi,

Just delete /.secondrom folder including two files inside: data.img and cache.img from internal sdcard. You can also format system partition of 2nd rom from CWM: mounts and storage > Format 2nd rom system.
[Galaxy S II Q&A, Help & Troubleshooting] dracula8275:
I've done that :(

After delete the same thing and my memory is 0 ot the sd card. After delete - only 189 mb. Is there another file to delete? CWM gives me an error while formating data :( Thank you
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Check the folder /LOST.DIR. If there is anything inside - you can delete it.
[Galaxy S II Q&A, Help & Troubleshooting] dracula8275:
Thank you!! Working for me
[Galaxy S II Q&A, Help & Troubleshooting] toonarmy4life:
Alright ppl. Im running two roms (dual booting) i just wanna know if i flash a modem to my first rom does my 2nd rom use same modem thanks in advance
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Yes. Furthermore, if you flash second rom, a modem coming with this rom will replace a modem flashed earlier with the first rom.
[Galaxy S II Q&A, Help & Troubleshooting] dracula8275:
Miui rom 2.11.23

Hi friends,

I'm using Syiah 4.1.5 with CM9 as primary rom. Can I flash MIUI ROM 2.11.23 as secondary rom with the same kernel or I must flash Syiah 5.0.1? Thank you in advance
[Galaxy S II Q&A, Help & Troubleshooting] kerbiii:
Cool thnx for this. Is there any chance of bricking your phone if your flashing on the 2nd rom?
[Galaxy S II Q&A, Help & Troubleshooting] fatthumb:
Guys I urgently need help/suggestion, currently in big trouble. I installed TWRP recovery yesterday and today I mistakenly use boot to 2nd room utils and flashed 2nd rom (weirdly it goes to Siyah recovery which I used before TWRP). Followed the steps in post #1 but boot process stucked at CM logo (1st rom is latest sammy jb, 2nd rom I installed is temasek #100).

Now I can't boot to any ROM and stucked inside TWRP. Wiped everything but couldn't flash any ROM. It said failed to flash, I believe something is wrong with the partition.

Does anyone have any idea on how to flash a new ROM to my SGSIII? Please help :(
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Sorry, I must have missed your post. Have you solved it already. If not is this rom on xda (could you provide the link)?.

No, you will not brick phone by this. superbrick bug if you mean that may happen if you are on ICS 4.0.4 rom with stock kernel and doing some wiping or formating. For flashing 2nd rom you have to be on a safe kernel like: Siyah or Dorimanx. These kernel protect phone from superbrick.

Regards

Sorry, you are on not proper sub-forum. As you probably noticed this is SGS2 thread dealing with dual-booting for SGS2 with Siyah kernel. Even I'm willing to help you, I can't because I don't know your device.

ASAIK dual-booting concept for SGS3 is significantly different - Siyah kernel incudes "special" "Alternate Recovery" or "Embedded Recovery" which doesn't exists in kernels for SGS2.

So, go to SGS3 sub-forum and ask your question there for example in this

THREAD
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
Hey Many AFAIK, its only the kernel thats been shared with the 2 rom's under Dual boot, while the modems are independent, do correct me if i am wrong:)
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Hi,

- from theory modems are placed in our phones in modem partition (MODEM -> /dev/block/mmcblk0p8). I haven't heard anything that for 2nd rom's modem there is a special partition/location used. So, there is only one.

- my experience prove this - when I flashed anewer rom as the 2nd one, it flased a new kernel as well. When I booted to the 1st rom - the kernel was replaced (the new one replaced the old one).

AFAIK only unique partitions for 2nd rom are system (HIDDEN -> /dev/block/mmcblk0p12), data (sdcard/.secondrom/data.img), cache (sdcard/.secondrom/cache.img)

Regards
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
Hey Many, thinks for the quick reply buddy:)

will try to probe more on the same, if any thing new found will let u know:)

regards
[Galaxy S II Q&A, Help & Troubleshooting] aviral1990:
I am currently on siyah 5.1 kernel..so can i dual boot my current neat rom(ICS) with neat rom JB? can siyah 5,1 support it?

thnx
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
It's Siyah 5.0.1 not 5.1, unless you know something about a new release :)

No Siyah 5.0.1 neither any other kernel supports dual-boot of stock JB rom. Sorry.

regards
[Galaxy S II Q&A, Help & Troubleshooting] bruzzler2809:
Hi,

i try to install a second rom, but I always get the error "E:cant open ...(bad)" while trying to install.

Tried both with internal and external storage.

What could be the problem?

Thanks
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Hi,

First of all you should have provided following info:

- what kernel you are in

- what rom do you have as 1st one

- what rom you are goona install as 2nd

These are basics to expect later on reasonable help

However even not knowing that here are some preconditions to make dual-booting possible:

1. rom must be supported by the kernel

2. rom must be in ZIP ver

3. on internal sdcard must be available more less 2.5GB free space

4. before flashing, following steps have to be performed:

- Remove 2nd ROM

- Wipe 2nd ROM data/cache

- Wipe 2nd ROM dalvik-cache

Regards
[Galaxy S II Q&A, Help & Troubleshooting] bruzzler2809:
Hi sorry, thought it is clear, that someone read the topics about DualBoot first :)

Well to answer:

- Dorimanx Kernel 7.26

- Rom JellyBam 4.1.2

- SecondRom should be Rootbox ICS 4.04

Precautions:

- Dorimanx Kernel supports JB and ICS

- Rootbox is in zip-format

- Freespace is 4 GB

- wiped everything first.

As mentioned the error is that it can't open emmc/Downloads/Rootbox.zip (for internal ) or sdcard/Downloads/Rootbox.zip (if I put on external card).

Looks like a problem witgh the path??

//UPDATE: Error in the ZIP FILE, DOWNLOADED IN ASCII MODE!!!
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
try putting the rom zip file on the root of ur internal Sdcard and then try flashing it and see:)
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Aha.... You are on Dorimanx.... and NOT on Siyah ...so you posted your question tbh on wrong thread :). From the title: "How to Dual Boot using the Siyah Kernel" you see it concerns Siyah kernel particularly and even Dorimanx kernel was build based on Siyah some time ago, Dorimanx Dev made a lot of changes/improvements/modificatioons that it's now significantly different kernel. Might be dual-booting functionality is similar but don't know.

But, even I don't know Dorimanx at all because I've never used it, I don't like leaving guys asking for an advice without any answers :)

In this case a solution (indirect one because I never faced that problem on Siyah) would be:

- nandroid backup of 1st rom

- clone 1st rom to 2nd

- flash Rootbox as the 1st rom

- Swap roms

or post your question on Dorimanx thread.

Regards

Edit: Of course do it only if Sun90's hint doesn't help :)
[Galaxy S II Q&A, Help & Troubleshooting] koooowweeee:
I've decided to give this a try. currently im on neatrom ics but would like a JB rom. could some one recommend me one please.
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Hi,

But recommend what?

If you are here on this thread you are supposed to be interested in dual booting. If you then would like to have two roms: ICS and sammy JB - it's not supported yet. Dev is working on new kernel which will be able to boot Stock jb roms.

Btw, why are you on so old Siyah? Update it to the latest 5.0.1 or at least to 4.1.5.
[Galaxy S II Q&A, Help & Troubleshooting] koooowweeee:
it says in my post i would like a JB rom, but you have explained there not supported yet.

i have never just flashed a kernel on it own. i just find a rom that people are saying its stable and flash it. i don't really like to mess to much just incase i mess it up.

might give that a go in your Sig

thanks
[Galaxy S II Q&A, Help & Troubleshooting] epistimonic:
Hello to all. Very good threat I can say. I have read all the pages and took a lot of advices.

Nevertheless, I want to ask among with my Resurrection Remix JB v3.1.2 with 3.0.31-Siyah-S2-v5.0b1+ kernel which ROM do you suggest to put as second ROM so I can start the journey to DUAL boot ?

Thanks!
[Galaxy S II Q&A, Help & Troubleshooting] jayant619:
rom specificaion

Hi jst wanna ask the secondary room has to support some kind of dual booting or i can do it with any rom

more over i want to install linux as my 2nd rom will tht work?
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Pls define more detaily:

- What phone are you on currently (this thread is for SGS2/android OS)

- what is your current setup (rom/kernel)

- what exactly rom would you like to have as 2nd one

Otherwise I'm not able to give you any reasonable answer.

Regards
[Galaxy S II Q&A, Help & Troubleshooting] epistimonic:
Anyone? :)
[Galaxy S II Q&A, Help & Troubleshooting] timberwolf60:
I used siyah 5.0.1 as the signature below.

Send via my GT I9100 using Tapatalk2,

1st ROM RB 3.2

2nd ROM RR 3.1.2

Siyah 5.0.1, SuperSU pro
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Sorry, I must have missed your post. Firstly, why are you using beta ver if Siyah? Update it to the latest one supporting dual boot - 5.0.1. Then you can flash many roms as 2nd one; the supported ones are: CM9, CM10 based (with new mali drivers) AOSP/AOKP 4.1.2, stock samsung roms ICS 4.0.3/4.0.4. Not supported are CM10 based roms with old mali, CM10.1/AOKP 4.2.1, samsung stock JB 4.1.2. So you see, there are many possibilities and just choose a rom (from supported groups) which fits best to your expectations (read their changelogs/feature lists). If you really need my advice I would recommend one of the latest Neatroms ICS 4.0.4. Worked well for me, but it's very subjective).

Regards
[Galaxy S II Q&A, Help & Troubleshooting] epistimonic:
I want to thank once more about this amazing threat. I read again all the pages.. damn i am a bit exhausted :P..

I am using Resurrection Remix JB v3.1.2 and kernel Siyah v5.01.

I am waiting my SDexternal card 32gb to free some space so I can enjoy Dual boot easier.

I have some questions more if its easy to answered:

1. After i successfully install dual boot (I think without problem) what is the correct order to delete/erase/disappear totally if i want the 2nd ROM?

2. Sorry for this newby qs: I am totally confused with Nadroid backup.. Titanium Backup is an Nadroid backup?

3. Can you please provide me a link with different profile settings for the kernel? (for performance, battery saver, etc)
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Sorry, have to sleep a little it's almost 4a.m in my country. Gonna answer you later if you don't mind.

Regards
[Galaxy S II Q&A, Help & Troubleshooting] Phistachio:
1. If you want ONLY the 2nd ROM, the swap the ROMs in recovery. After that, you should have the 2nd ROM as the main ROM and the 1st ROM as the secondary. After that, just wipe the secondary ROM as normal.

2. Nandroid backup is what we name to the backups made from Recovery, AKA CWM or TWRP recovery.

3. Apologies, that can only be answered by Many, since I don't own the phone anymore :)
[Galaxy S II Q&A, Help & Troubleshooting] Eddie^^:
Very nice guide, but I would not be a fan of booting two Android systems together. We should, however, see some proper dual boot mobile phones this year. With the Firefox OS coming out and Ubuntu and Tizen, which are all Linux based and open-source.

Actually, if anyone is interested in Firefox OS and dual-booting it, I would recommend checking out www.thefirefoxos.com :)
[Galaxy S II Q&A, Help & Troubleshooting] Troy.main:
Thank you
[Galaxy S II Q&A, Help & Troubleshooting] hllcglr:
everything went great. thank you but

on my pc, i open chrome and open google play. and select an app and click install. it says a few moments the app will be installed to your phone. i tried this 5-6 times on different apps. i waited and nothing downloaded and installed to my phone. but when i reboot and open the 2nd rom BAM.. all apps i clicked yesterday started to downloading. why? how can i download from pc play store to my 1st rom directly. and after that i am oppening play store from pc and see google maps already installed to my phone. but it is not on my 1st rom. it is on my 2nd rom but when i open store from my 1st rom i cant find google maps
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
This is is strange. However I think that Google Play Store finds your phone based on your Google account to which you are logged on in your computer and set up in your phone. Theoretically it may happen that if in your 1st rom you set up different account (or no account) than you are logged on to the pc - you will not receive any apps. But if your 2nd rom account fits - as soon as you boot to it and connect to Internet, the apps will appear for download.
[Galaxy S II Q&A, Help & Troubleshooting] hllcglr:
Nope... Both roms have same account
[Galaxy S II Q&A, Help & Troubleshooting] Anorah:
Will dual boot work with CM10.1 and official JB rom on Siyah Dorimanx kernel (v. 7.44)?
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Classicaly not, but with implementation of some quite advanced tricks it's possible. Read this thread for more info:

http://xdaforums.com/showthread.php?p=37248981
[Galaxy S II Q&A, Help & Troubleshooting] WarioNeila86:
Hi all,

I've just tested this awesome feature with success. However I have a couple doubts.

If I install some apps in the 2nd ROM, where are these apps installed? In the same hidden partition?

And if so, are these apps completely deleted if I wipe the 2nd ROM?

Thanks in advance!
[Galaxy S II Q&A, Help & Troubleshooting] Sun90:
AFAIK, yes wiping 2Nd Rom will remove all those apps installed on it:)
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
2nd rom uses following partitions:

/data partition - /sdcard/.secondrom/data.img as mountable img file on sd card

/cache partition - /sdcard/.secondrom/cacha.img as mountable img file (in the same folder)

/system partition in hidden partition (called also as "preload"): /dev/block/mmcblk0p12

So, under condition that you mean user apps - they will be installed on sdcard in /.secondrom/cacha.img folder.

If you wipe whole 2nd rom by performing "Remove 2nd rom" command - everything will be wiped: /system partition of 2nd rom will be formated + /.secondrom folder (containing data and cache partitions) will be deleted.

Regards
[Galaxy S II Q&A, Help & Troubleshooting] WarioNeila86:
And what about if I only perform a wipe data instead of removing 2nd ROM? I suppose these apps are going to deleted as well.
[Galaxy S II Q&A, Help & Troubleshooting] 147keul:
Hi!

Great guide. Seeing to dualboot my phone.

Didn't have the time to read all posts and a search gave me nothing, just to know : did anyone try to install a linux as first or second boot? Would be great.
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
When you wipe "wipe 2ndrom data/cache" from dual-boot options of CWM recovery then it's obvious that data will be wiped because this option is just to perform exactly this function :)

But then your /system will stay untouched (not be wiped)
[Galaxy S II Q&A, Help & Troubleshooting] vimsec11:
erro while wiping 1nd rom ,,,,,i m on rootbox 3.5 nd siyah 5.0
[Galaxy S II Q&A, Help & Troubleshooting] galonpzw:
Not working for me on Super Nexus Rom, and ReVolt as 2nd ROM :/ always boot into 1st ROM :/
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Why do you state something not providing sufficient information:

- what ver of Super Nexus?

- what ver of ReVolt?

- what ver of Siyah kernel?

Nevertheless, I assume you are on the latest releases of those roms, so in this case the answer is: there is no Siyah kernel which would support dual boot of any of CM10.1 (JB 4.2.1) based roms neither samsung stock JB 4.1.2 roms.
[Galaxy S II Q&A, Help & Troubleshooting] WarioNeila86:
I'm not sure about it.

I'm using Dorimanx 8.1, Slim Bean as 1st and Supernexus as 2nd (last releases).

Now I can't start 2nd ROM however I was able to do it with previous releases (Slim Bean with 4.2.1 and Supernexus with 4.2.2)...
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
But I am. I was writing about Siyah kernel (not Dorimanx) because:

- it's Siyah kernel's dual booting thread

- he asked about Siyah

It's described in latest Siyah6beta5 kernel's changelog by GM here:

http://www.gokhanmoral.com/
[Galaxy S II Q&A, Help & Troubleshooting] WarioNeila86:
Yes, you're right.

I was thinking that behaviour was the same being that Dorimanx is based on Siyah, I hadn't read the changelog yet.

Sorry.
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
No, problem - it's always worth for me to get some usefull information from the others (like you just provided) about dual boot on other kernels like Dorimanx.

You are right that Dorimanx is based on Siyah but since the beginning when it was developed it has changed a lot. So, even GM still contribute from time to time helping Dorimanx team, Dorimanx kernel differs from Siyah a lot.

Regards
[Galaxy S II Q&A, Help & Troubleshooting] galonpzw:
Oh, soryy.. all new version ;) i miss the info about not supporting jb :)
[Galaxy S II Q&A, Help & Troubleshooting] immortalneo:
Dual booting rocks!!

I didnt know I coould dual boot on my phone until I read this thread!! Now happily booting JellyBAM 4.1.0 as my primary and CM10 as secondary! Thanks a lot!! :D
[Galaxy S II Q&A, Help & Troubleshooting] uholeg:
Siyah to external sd

Can one install secondary Rom in Siyah kernel to external sd, but not to internal?
[Galaxy S II Q&A, Help & Troubleshooting] immortalneo:
I dint think that is possible.. AFAIK ROMs can only be installed in internal memory. :)

"To err is human, to forgive is divine"

Sent from my SGS II
[Galaxy S II Q&A, Help & Troubleshooting] gluni:
i know this is SII thread, but would the Siyah kernel work on GNote2 (7105)?

thx
[Galaxy S II Q&A, Help & Troubleshooting] immortalneo:
AFAIK Siyah is for S2 and S3 only..:)

"To err is human, to forgive is divine"

Sent from my SGS II
[Galaxy S II Q&A, Help & Troubleshooting] Enea307:
CWM Dual Boot options?

Im On Stock, Rooted GT I9300 4.1.2, CWM 6.0.2.8 and Siyah Kernel s3 v-1.8.9 Im trying to install 2 Rom but when i go to recovery i cant see "Dual Boot options" what am i missing??? and can u tell me some of Roms that can i install as 2 Rom. Thnx
[Galaxy S II Q&A, Help & Troubleshooting] Many40:
Sorry but you requested help for device which is not supported on this sub-forum/thread. If I've had S3 I would've helped you but I wouldn't (even very willing) because I have only s2.

Try asking on proper sub-forum please.