[Q] Black screen after flashing kernel - Galaxy S II Q&A, Help & Troubleshooting

Hi,
I tried to flash a new kernel through odin but when my phone reboots the screen stays black (but I can still hear the boot-up sound).
I'm running stock 4.1.2 on I9100 and I'm rooted.
Is there a way to solve this?
Or just explain why this is happening?
Thanks,
Omit931

More details pls mate.
What kernel and were from?
What ROM/firmware?
What have you tried?
Can you get to download mode or recovery?

andrewwright said:
More details pls mate.
What kernel and were from?
What ROM/firmware?
What have you tried?
Can you get to download mode or recovery?
Click to expand...
Click to collapse
I have tried with Siyah (and Dorimanx, which is based on Siyah) Kernel (from here on XDA).
I'm just using the official stock rom 4.1.2 (but rooted)
I can get into recovery and download mode.
So i can get back to stock kernel to get all functions back, but I would like to try other kernels to try dual-boot, better performance,...

Flash dori 8.32 I no this works. Flash through recovery. To dual boot a 4.1.2 ROM it need to be moded. stock won't dual boot. Don't try.

I just tried to do that but I keep getting an error message:
"E:signature verification failed"
edit:
After looking a bit more into it, the error is "status 7" which would mean (according to google) that it isn't compatible with my phone.
Which surprises me since it is a kernel build for the i9100.

I've also seen a status 7 for a bad download of the file. Re-download the kernel and give it a go.
As you can't boot, download the kernel on your pc, then in cwm, go mounts&storage >mount usb. Then transfer the file over from pc to phone, and flash. Dorimanx 8.32 is a good bet as Andrew said.
Edit: that's assuming that you boot into CWM recovery, not the stock recovery.
Also, when you were flashing via Odin, were you flashing the tar extension as needed? Or did you accidentally grab the zip file? Zip file won't work on Odin, only in a custom recovery.
Sent from a galaxy far, far away

When I flashed with Odin, I did use the tar file. There was no error using odin but when I rebooted, the screen stayed black.
I would want to use CWM but when I try to instal it (using the zip file from the Clockworkmod site) it's only temporary because when I reboot the phone, it's back in stock recovery

Yes, correct. To get the permanent recovery, you can use PhilZ kernel. Its the stock kernel, only rooted and with CWM recovery. It comes in an Odin version as well as a version which is flashable from stock recovery.
But back to your flashing....
What 4.1.2 are you on? And it is an i9100 we're talking about right?
And what kernel did you flash?
If Odin said it passed, the reason (except on rare cases) for it not booting is that there is an incompatibility between the ROM and the kernel you flashed.
Sent from a galaxy far, far away

It is the i9100, buildnumber: i9100xwlss (if that's what you're asking).
I tried to flash Siyah and Dorimax (I know this is based on Siyah). Both gave the status 7 error.
I'll try Philz Kernel and let you know what the result is.
Edit:
Philz Kernel installed and working perfect. Thank you very much!

Yes, that's what I was asking.
Great work! Now you should be set make sure you read carefully before doing anything, that's my tip.
Sent from a galaxy far, far away

Related

[Q] Flashing white screen on boot

hi guys, first post
ive had my rooted galaxy s2 with the latest siyah kernel 3.3.2, i had cwm recover 5 and rom manager
i tried to flash cyanogen mod through rom manager, following the steps it gave me, i downloaded the files through rom manager and went through all the prompts till i clicked agee to go into recovery mode.
once it did that the phone shut off but would not turn on again so i went to turn on manually, it loads the samsung galaxy screen with the yellow triangle but goes straight into a white flashing screen.
Ive tried taking the battery out, leaving it and putting it back in again, still a flashing screen,
check what i9100 you have and download correct cm9.
using cwm format data system cacha sdcard dalvik
flash cm9 using cwm
rommanager doesnt work on GS2
atifsh said:
check what i9100 you have and download correct cm9.
using cwm format data system cacha sdcard dalvik
flash cm9 using cwm
rommanager doesnt work on GS2
Click to expand...
Click to collapse
i have the international 19100T
ahh rats i should have known rom manager does not work, , im just stuck in a white flash screen on boot up, cant get to cwm, although i can get into odin
would reflashing my kernel on odin get me through? everything is back up onto my sd card.
Try flashing a kernel first, and if that doesn't work, flash a rom in Odin, re-root your phone & restore your backup. But yeah, don't use Rom Manager with a kernel that has CWRecovery. One or the other. Rom Manager has a habit of doing stuff like what's happened to you on SGS2's which also have CWRecovery installed.
MistahBungle said:
Try flashing a kernel first, and if that doesn't work, flash a rom in Odin, re-root your phone & restore your backup. But yeah, don't use Rom Manager with a kernel that has CWRecovery. One or the other. Rom Manager has a habit of doing stuff like what's happened to you on SGS2's which also have CWRecovery installed.
Click to expand...
Click to collapse
awesome, I tried flashing the latest siyah kernel, the one that i already had on my phone before the problems, that didn't do anything to get me through, any suggestions on which kernel/rom to flash?
because you are on siyah and im not comfortable with that, please flash a stock kernel or cfroot kernel and format system data partitions after that.
now flash any official stock ICS or GB rom using Odin.
atifsh said:
because you are on siyah and im not comfortable with that, please flash a stock kernel or cfroot kernel and format system data partitions after that.
now flash any official stock ICS or GB rom using Odin.
Click to expand...
Click to collapse
ohh sweet baby jesus im i flashed a cf kernel and now im into cwm on 4.0.1.5, can i just normal reboot my phone now?
No need to format anything. Given you want to use CM9, I'd recommend you flash CM9 Resurrection Edition in Odin, put the latest CM9 nightly & Gapps on your internal/external SD card then flash that nightly & Gapps in CWM (read the first page of the CM9 discussion thread thoroughly & follow the instructions to the letter. From there you can stick with the CM9 stock kernel or flash whatever other kernel you want to use (provided it's CM9 compatible).
From then on, if you want to flash CM9 nightlies, do it via CWM/CWRecovery, just don't use Rom Manager this time I use CM9 as well & I have it frozen because I use Siyah (which has CWM).
MistahBungle said:
No need to format anything. Given you want to use CM9, I'd recommend you flash CM9 Resurrection Edition in Odin, put the latest CM9 nightly & Gapps on your internal/external SD card then flash that nightly & Gapps in CWM (read the first page of the CM9 discussion thread thoroughly & follow the instructions to the letter. From there you can stick with the CM9 stock kernel or flash whatever other kernel you want to use (provided it's CM9 compatible).
Click to expand...
Click to collapse
alrighty! thanks for the info, is cf kernel compatible with cm9? i want to just have one kernel that'll handle most roms, any suggestions?
ive reloaded my old stable phone version, the version i saved before trying to flash cyanogen mod with rom manager, this version has siyah and stock rom, back to square one *phew*
i still say wipe first, cm9 will come with its own latest cwm that can be used to flash any custom roms after.
flashing via odin version is easy and fool proof as it has everything bundled for correct working of cm9.
If you flash CM9 the CM9 kernel will overwrite/replace your CFRoot kernel, which is fine. As I said in my previous post you can stick with that if you're happy with it, or you can flash any other kernel that's CM9 compatible.
No suggestions/recommendations. Because your experience will not be the same as someone else's using a given rom or kernel. If you want to go down that path, try some kernels to find one you like. To see if a kernel is compatible with CM9, read the the dev thread devoted to the kernel in question.
OK. Given you're back @ square one, Atifsh is right when he says flashing the Resurrection version (Odin version) then flashing Gapps/nightly from there is probably a good way to go for you. Once you've done that, you'll be able to flash CM9 nightlies via CWRecovery. As said previously, read that first page of the CM9 discussion thread/instructions thoroughly before you do anything.
keegan25 said:
alrighty! thanks for the info, is cf kernel compatible with cm9? i want to just have one kernel that'll handle most roms, any suggestions?
ive reloaded my old stable phone version, the version i saved before trying to flash cyanogen mod with rom manager, this version has siyah and stock rom, back to square one *phew*
Click to expand...
Click to collapse
Something similar happened to me too. I flashed stock XWLPG, then siyah 3.3.2 and did a factory reset. After that, got stuck in a flashing white screen after the yellow triangle.
What I did: boot on download mode, flash XWLPG over PC Odin once more, did a full wipe BEFORE flashing siyah and then siyah. Everything went ok this time, but eventually I found out that every time I do a factory reset after siyah that problem would occur.
Regards,
Sent from my GT-I9100 using XDA
keegan25 said:
i have the international 19100T
ahh rats i should have known rom manager does not work, , im just stuck in a white flash screen on boot up, cant get to cwm, although i can get into odin
would reflashing my kernel on odin get me through? everything is back up onto my sd card.
Click to expand...
Click to collapse
exact same problem, except i can't put it into download mode?
i know it's powerbutton vol down but it's not working? any ideas?
acbutcher91 said:
exact same problem, except i can't put it into download mode?
i know it's powerbutton vol down but it's not working? any ideas?
Click to expand...
Click to collapse
Power + vol down + home key?

stuck after cwm flushing

Im stuck after i flushed cwm5 through odin! i have just the yellow triangle but nothing after that! im able to get into recovery mode (the blue one) and download mode also but nothing else!
Flash latest official firmware, http://samfirmware.com/ via Odin and will be OK.
After that remember to use safe kernel.
No need to flash stock firmware since you can enter recovery. Simply flash a zip version of a custom kernel like siyah or dorimanx. That comes with a custom version of CWM recovery and should get rid of the softbrick. Thereafter you can flash a custom ROM or stick to stock based on what you want.
Sent from my GT-I9100 using xda app-developers app
People are definitely getting stupider. Also its flash not flush.
Liorgex said:
Im stuck after i flushed cwm5 through odin! i have just the yellow triangle but nothing after that! im able to get into recovery mode (the blue one) and download mode also but nothing else!
Click to expand...
Click to collapse
I don't really understand why did you need to flash recovery, while it comes updated with the kernel. Basically you need yo flash a kernel with odin now that's compatible with your android version. Not hard to find. Your phone will boot no problem

My s2 won't boot any custom roms

Ok before we start, I have looked and tried everything I can find so I will post what I have done after I post my issue. (I know I'm new but I've been using this site a lot lately I just never signed up)
Alright.
My S2 gt-i9100 running ICS 4.0.3 XXLPB
I can root it with cf mod, no problem and confirmed that the root is working properly.
I use CWM recovery. Every single time I've tried to flashboot a custome rom, from Res Remix to straight up cm10 to other jelly bean mods, all the "top" mods suggested in articles, though it says successful, It always, always gets stuck on the Galaxy s2 screen with the yellow triangle. It does not go black, it just stays on that screen, I've left it for as long as 2 hours and it does not do anything and does not let me back into recovery mode. (download mode yes)
I have, multiple times, re-installed stock rom, re-rooted etc...
cleared cache and davik cache, factory reset and format system (prior to flashing the custome roms and sometimes right after as some suggest)
I even tried a complete wipe of the sd card, system, then reflashed stock rom. It always works to return to stock rom and to root it, but nothing else. It seems every solution I find on this site, and many others are point to the above things I have tried all with a slight variety. I have tried many different custom roms,
I'm lost what to do next? I can't find any other information, my binary count is up to 18 now and none of it has worked.
Which kernel are you using?
tejasrm said:
Which kernel are you using?
Click to expand...
Click to collapse
I'm sorry, I thought I mentioned all the info I had.
My current kernel version for ICS is 3.0.15-I9100XXLPB
The kernels I have tried when booting res remix are both Dormanx(sp?) and CM10.1, also tried cm10.1 with another rom.
Sorry I added info, not sure which one you wanted
bbnuck said:
I'm sorry, I thought I mentioned all the info I had.
My current kernel version for ICS is 3.0.15-I9100XXLPB
The kernels I have tried when booting res remix are both Dormanx(sp?) and CM10.1, also tried cm10.1 with another rom.
Sorry I added info, not sure which one you wanted
Click to expand...
Click to collapse
1) re- install stock ICS 4.0.3 rom vide ODIn.
2) use the tar file of siyah kernel v4.1.5 or 5.0.1 to root ur phone vide Odin.
3) now use the siyah kernel v4.1.5/5.0.1 recovery to flash any custom rom of ur choice by fallowing the install instruction of the same carefully
Sun90 said:
1) re- install stock ICS 4.0.3 rom vide ODIn.
2) use the tar file of siyah kernel v4.1.5 or 5.0.1 to root ur phone vide Odin.
3) now use the siyah kernel v4.1.5/5.0.1 recovery to flash any custom rom of ur choice by fallowing the install instruction of the same carefully
Click to expand...
Click to collapse
ohh, yes the Siyah kernel, I failed to mention that i tried rooting using the siyah kernel early on and it would get stuck on the boot screen and even ICS wouldn't work. now on the other hand, this was one of my early attempts and i've tried everything else twice so I will try this option again and get back thanks
I have now tried to boot kernel Siyah 5.0.1 twice and it gets stuck on the kernel boot screen after the samsung s2 screen (the one with the yellow triangle) The screen is a ying-yang symbol with pink/purple lighting. I have left it on for 10 minutes and it stays on that screen. I have removed the battery and put it back in and now it doesn't even get past the s2 bootup screen, I left it for a couple minutes, still nothing. Reboot the phone again and now it's in Kernel Panic Upload Mode... Going back to stock rom. I'll try to find a 4.1.5 siyah kernel and try that one and see if it does anything different.
Sun90 said:
1) re- install stock ICS 4.0.3 rom vide ODIn.
2) use the tar file of siyah kernel v4.1.5 or 5.0.1 to root ur phone vide Odin.
3) now use the siyah kernel v4.1.5/5.0.1 recovery to flash any custom rom of ur choice by fallowing the install instruction of the same carefully
Click to expand...
Click to collapse
Alright, after what happened in the previous message, I have download siyah kernel 4.1.5 and have attempted to flash via odin to root my phone. It did not work either, same issue as 5.0.1. back to stock rom/rooted with cf-root
Try dorimanx ver. 7+ tar or zip
Sent from my GT-I9100 using xda premium
stopro said:
Try dorimanx ver. 7+ tar or zip
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
Just tried dorimanx version 7.50, gets stuck on the bootlogo screen, similar to what siyah was doing.
edit: Also tried dorimanx 8.1, same thing.
Edit: Tried dorimanx 8.3, flashed through cwm recovery this time, still does the same thing
Mate OK download gskernel viper script download syiah 4+ flash boot should work
Sent from my GT-I9100 using xda premium
stopro said:
Mate OK download gskernel viper script download syiah 4+ flash boot should work
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
hi, i have a problem close to the problem here. i recently soft bricked my phone ,sgs2 gti9100 with jellybean 4.1.2. so i tried installing a custom rom named neatrom. after installation the phone reboots and stays in the flashing android sign. it stays like that until the battery runs out. do you think i should change kernals or flash stock rom?
Najahmas said:
hi, i have a problem close to the problem here. i recently soft bricked my phone ,sgs2 gti9100 with jellybean 4.1.2. so i tried installing a custom rom named neatrom. after installation the phone reboots and stays in the flashing android sign. it stays like that until the battery runs out. do you think i should change kernals or flash stock rom?
Click to expand...
Click to collapse
hi mate sorry for late answer but first instal good stock rom by odin then instal best out there kernel for s2 dorimanx but there is 3 versions of it 8.x for stock 9.x mali v2 mean old jb and 10.x mali v3 for latest jb and kk good luck
Najahmas said:
hi, i have a problem close to the problem here. i recently soft bricked my phone ,sgs2 gti9100 with jellybean 4.1.2. so i tried installing a custom rom named neatrom. after installation the phone reboots and stays in the flashing android sign. it stays like that until the battery runs out. do you think i should change kernals or flash stock rom?
Click to expand...
Click to collapse
And don't forget to go in recovery mode and wipe out the dalvik memory under advanced. After wiping dalvik/clearing user data and formatting your phone, reinstall the rom of your choice (that's compatible with the phone)
you can also install siyah 6 and flash kitkat directly from recovery.
Then it would use kitkats kernel and bootup the rom
thank you guys for your replys. i will try what you suggested and get back to you

Unable to install any softwre outside of Odin. Please Help.

[Solved]
I am unable to flash any roms through cwm, and can only do it through odin. Flashing through cwm results in the phone not loading past the boot logo.
I formatted sd card in cwm, thinking it would only restore to factory settings, not knowing it would completely wipe everything.
From then i was unable to even see the boot logo or recovery mode, but luckily download mode still worked.
So i flashed the stock rom through odin, but it still plays up. Now the battery doesn't last more than 1 day, and constantly freezes.
Now whenever i install anything in cwm, as soon as i reboot, it goes to the bootscreen and freezes. I have tried at least 5 different roms and the same story each time, So each time i have to reflash stock rom with odin.
So any ideas to why this is? any help is appreciated. I have tried ultimate kernel wipe cleaner , or whatever it is called as well.
[Solved]
I just reflashed stock ICS in odin, and ticked the 're-partition' box. the repartition file is called " u1_02_20110310_emmc_EXT4.pit ". Now it works good as new and I'm currently running PACman rom on 4.3. gg guys.
Just to check, but you have factory reset after flashing the new ROM from CWM right?
Try these steps :
1. Flash ROMNuke script by hawkerpaul. (it's a ROM nuke, not just a kernel nuke)
2. Flash ROM in CWM.
3. Boot.
I know it sounds simple, but that's got me out of a few odd bootloop /failed flash situations. Give it a go.
Then, if that doesn't work, re-download the ROM which you're attempting to flash & try again.
One more thing, what kernel are you trying to flash the ROM from in CWM? Try a different one, say siyah. I've sometimes seen where a particular kernel won't flash but another will for no apparent reason.
Sent from a galaxy far, far away
Hopper8 said:
Just to check, but you have factory reset after flashing the new ROM from CWM right?
Try these steps :
1. Flash ROMNuke script by hawkerpaul. (it's a ROM nuke, not just a kernel nuke)
2. Flash ROM in CWM.
3. Boot.
I know it sounds simple, but that's got me out of a few odd bootloop /failed flash situations. Give it a go.
Then, if that doesn't work, re-download the ROM which you're attempting to flash & try again.
One more thing, what kernel are you trying to flash the ROM from in CWM? Try a different one, say siyah. I've sometimes seen where a particular kernel won't flash but another will for no apparent reason.
Sent from a galaxy far, far away
Click to expand...
Click to collapse
it was stock ics cwm i think?, also another thing when I install a new rom, when it shows the progress bar, it goes up to 3 quarters then it skips the rest and says update completed (I just tried Romnuke and same story). I have also tried siyah kernel and it just freezes at the siyah kernel instead. Im currently stuck on stock ICS 4.0.2
Not sure what you mean by 'stock ICS CWM'?
And just to make sure, you definitely have an i9100 right? Not a variant, i9100g etc? Just asking as 4.0.2 was never released for i9100, only 4.0.3 and 4.0.4 (stay away from that one)
So now, re-download the ROM which you're attempting to flash, and try again after the ROMNuke script. Does the script run successfully? Or does it have errors /messages which indicate it didn't run successfully?
Sent from a galaxy far, far away
Hopper8 said:
Not sure what you mean by 'stock ICS CWM'?
And just to make sure, you definitely have an i9100 right? Not a variant, i9100g etc? Just asking as 4.0.2 was never released for i9100, only 4.0.3 and 4.0.4 (stay away from that one)
So now, re-download the ROM which you're attempting to flash, and try again after the ROMNuke script. Does the script run successfully? Or does it have errors /messages which indicate it didn't run successfully?
Sent from a galaxy far, far away
Click to expand...
Click to collapse
my bad it is 4.0.3, it is definitely only gt-i9100, and in recover mode it says CWM-based Recover v5.0.2.7
kobe24lebron23jordan said:
my bad it is 4.0.3, it is definitely only gt-i9100, and in recover mode it says CWM-based Recover v5.0.2.7
Click to expand...
Click to collapse
All good. And also good that you have an i9100.
Ok, so have you tried the things I said?
1. Try flashing from a different kernel (your choice, try one other than Siyah)
2. Re-download the ROM & reflash with Nuke script then ROM.
[Solved]
5 months later I found the answer when messing with odin. What you do is tick the 're-partition' box, and then in the 'pit' sections you need the partition file i guess, for the i9100 its called u1_02_20110310_emmc_EXT4.pit . hope this helps anyone else who may have this problem

[Q] Phone reboot and enter in recovery mode

I I rooted my S2 I777 using Frameroot-1.4.2 and flashed via Odin CWM 5.0.2.3 then I flashed AoCP KitKat from from GalaxyS2Root.com and now my phone is in a loop entering in recovery mode.
I flashed the rom on CWM and when I asked to reboot the system it start reboot and enter in recovery mode again.
I tried to flash the official rom from AT&T with Android 2.3.4 and even after I flash this rom it doesn't stop to enter in recovery mode.
First thing to do: perform a wipe/data from within recovery.
creepyncrawly said:
First thing to do: perform a wipe/data from within recovery.
Click to expand...
Click to collapse
It was done and still reboot in recovery.
I tried to install a stock rom via Odin 1,85 but I failed in all the tries then I tried via Odin 3.07 and it worked and I did a full wipe and rebooted the system and it got back to recovery mode then I did it again and it worked.
Now I'm using a stock Rom with Androind 4.2.1.
Before it works I've tried to install the stock Rom and it worked then I rooted the phone and installed CWM and it always reboot in recovery mode.
gsilva92 said:
...then I rooted the phone and installed CWM and it always reboot in recovery mode.
Click to expand...
Click to collapse
This part makes me think you use Rom Manager, and that would explain why it keeps rebooting. There's no need to install CWM separately as it's included in i777 kernels. Rom Manager will ruin your phone, stay away from it (see the sticky).
SteveMurphy said:
This part makes me think you use Rom Manager, and that would explain why it keeps rebooting. There's no need to install CWM separately as it's included in i777 kernels. Rom Manager will ruin your phone, stay away from it (see the sticky).
Click to expand...
Click to collapse
I don't use Rom Manager.
It was rooted before and I was using a KitKat Rom but I tried to flash the Rom I mentioned and it bricked.
I unbricked it and rooted and installed CWM then it started with the problem.
As I said now I'm using a stock Rom with Android 4.2.1.
You said CWM is included in i777 Kernels so if I root my phone I can simply get in recovery mode and use the stock recovery to flash the Rom?
You mentioned that you rooted the stock firmware and installed a custom recovery, but without knowing your root - recovery process, it's hard to say where things went sideways.
The kernel of the i777 does include the recovery, but the stock kernel cannot be used to flash custom firmware.
>>this guide<< is one of the more reliable ways to go from stock to custom firmware.
summary;
-framaroot to establish root
-mobile odin to install custom kernel
-custom kernel to install custom firmware
happy flashing
-Cyril
gsilva92 said:
I don't use Rom Manager.
It was rooted before and I was using a KitKat Rom but I tried to flash the Rom I mentioned and it bricked.
I unbricked it and rooted and installed CWM then it started with the problem.
As I said now I'm using a stock Rom with Android 4.2.1.
You said CWM is included in i777 Kernels so if I root my phone I can simply get in recovery mode and use the stock recovery to flash the Rom?
Click to expand...
Click to collapse
cyril279 said:
You mentioned that you rooted the stock firmware and installed a custom recovery, but without knowing your root - recovery process, it's hard to say where things went sideways.
The kernel of the i777 does include the recovery, but the stock kernel cannot be used to flash custom firmware.
>>this guide<< is one of the more reliable ways to go from stock to custom firmware.
summary;
-framaroot to establish root
-mobile odin to install custom kernel
-custom kernel to install custom firmware
happy flashing
-Cyril
Click to expand...
Click to collapse
Thank you.
I'll follow this guide and I'll post here if it worked for me.
cyril279 said:
You mentioned that you rooted the stock firmware and installed a custom recovery, but without knowing your root - recovery process, it's hard to say where things went sideways.
The kernel of the i777 does include the recovery, but the stock kernel cannot be used to flash custom firmware.
>>this guide<< is one of the more reliable ways to go from stock to custom firmware.
summary;
-framaroot to establish root
-mobile odin to install custom kernel
-custom kernel to install custom firmware
happy flashing
-Cyril
Click to expand...
Click to collapse
I tried to follow the instruction in the link you sent me but I failed doing it.
I searched on google and I saw that Odin has an option OTA / Update zip but mine doesn't have this option.
Is there something I should do before flash a custom rom?
I'm using Mobile Odin Pro.
gsilva92 said:
I tried to follow the instruction in the link you sent me but I failed doing it.
I searched on google and I saw that Odin has an option OTA / Update zip but mine doesn't have this option.
Is there something I should do before flash a custom rom?
I'm using Mobile Odin Pro.
Click to expand...
Click to collapse
Agreed, the instructions in that guide can be a little confusing.
First, are you sure you are using the AT&T Galaxy S II SGH-I777? Because you said several times in this thread that you are now running 4.2.1, but there is no such version of the os for this phone. The latest official AT&T stock firmware is I777UCMD8 which is 4.1.2.
If you affirm that your phone is SGH-I777 running UCMD8 firmware, and that you have root, then the next step is to use mobile odin to flash AJK v4.9 NoSwap kernel. Download the zip file from the Kernel thread. Open the zip file with an archiving tool such as win-zip, 7zip, etc. and extract the boot.img. Mobile odin will not recognize the zip file, but it will recognize the boot.img as a kernel, and will flash that. So transfer the boot image to the phone sd card and flash with mobile odin.
Next, you will find that the phone buttons don't work. Transfer the AJK v4.9 zip file to the sd card, enter into Clockwork Mod recovery and flash the AJK v4.9 zip file. This will fix the buttons. Now you have a working stock UCMD8 with custom AJK kernel. Now you are ready to flash what ever firmware you want. Hope this helps, and feel free to ask questions.
creepyncrawly said:
Agreed, the instructions in that guide can be a little confusing.
First, are you sure you are using the AT&T Galaxy S II SGH-I777? Because you said several times in this thread that you are now running 4.2.1, but there is no such version of the os for this phone. The latest official AT&T stock firmware is I777UCMD8 which is 4.1.2.
If you affirm that your phone is SGH-I777 running UCMD8 firmware, and that you have root, then the next step is to use mobile odin to flash AJK v4.9 NoSwap kernel. Download the zip file from the Kernel thread. Open the zip file with an archiving tool such as win-zip, 7zip, etc. and extract the boot.img. Mobile odin will not recognize the zip file, but it will recognize the boot.img as a kernel, and will flash that. So transfer the boot image to the phone sd card and flash with mobile odin.
Next, you will find that the phone buttons don't work. Transfer the AJK v4.9 zip file to the sd card, enter into Clockwork Mod recovery and flash the AJK v4.9 zip file. This will fix the buttons. Now you have a working stock UCMD8 with custom AJK kernel. Now you are ready to flash what ever firmware you want. Hope this helps, and feel free to ask questions.
Click to expand...
Click to collapse
Thank you.
I'm gonna try it and I'll post at night (in Brazil) when I come back from work.
creepyncrawly said:
Agreed, the instructions in that guide can be a little confusing.
First, are you sure you are using the AT&T Galaxy S II SGH-I777? Because you said several times in this thread that you are now running 4.2.1, but there is no such version of the os for this phone. The latest official AT&T stock firmware is I777UCMD8 which is 4.1.2.
If you affirm that your phone is SGH-I777 running UCMD8 firmware, and that you have root, then the next step is to use mobile odin to flash AJK v4.9 NoSwap kernel. Download the zip file from the Kernel thread. Open the zip file with an archiving tool such as win-zip, 7zip, etc. and extract the boot.img. Mobile odin will not recognize the zip file, but it will recognize the boot.img as a kernel, and will flash that. So transfer the boot image to the phone sd card and flash with mobile odin.
Next, you will find that the phone buttons don't work. Transfer the AJK v4.9 zip file to the sd card, enter into Clockwork Mod recovery and flash the AJK v4.9 zip file. This will fix the buttons. Now you have a working stock UCMD8 with custom AJK kernel. Now you are ready to flash what ever firmware you want. Hope this helps, and feel free to ask questions.
Click to expand...
Click to collapse
I did exactly what you said and it worked but when I tried to flash a custom Rom it failed and bricked my phone again.
And now I'm back to the first topic, it always reboots in the recovery mode.
I'll try to fix it again.
I didn't see the error it showed me when failed in flash the custom rom. I know I should have seen it.
Here is a video of my phone rebooting in the recovery mode.
gsilva92 said:
I did exactly what you said and it worked but when I tried to flash a custom Rom it failed and bricked my phone again.
And now I'm back to the first topic, it always reboots in the recovery mode.
I'll try to fix it again.
I didn't see the error it showed me when failed in flash the custom rom. I know I should have seen it.
Here is a video of my phone rebooting in the recovery mode.
Click to expand...
Click to collapse
What firmware did you try to flash? If you tried again to flash the "AoCP KitKat from GalaxyS2Root dot com" that you mentioned in your first post, that in itself could be the problem. In the past, many products from the GalaxyS2Root website have caused numerous and various types of problems, including similar to your issue. For most of the past two and a half years, we have been advising people to avoid the Galaxy S2 Root website and products. It is best to flash firmware downloaded from XDA-Developers.
If you are trying to install a version of kitkat on your phone, then you also probably need advice from someone more familiar with kitkat, like cyril279 or SteveMurphy. Maybe one of them will jump in and help.
gsilva92 said:
I I rooted my S2 I777 using Frameroot-1.4.2 and flashed via Odin CWM 5.0.2.3 then I flashed AoCP KitKat from from GalaxyS2Root.com and now my phone is in a loop entering in recovery mode.
I flashed the rom on CWM and when I asked to reboot the system it start reboot and enter in recovery mode again.
I tried to flash the official rom from AT&T with Android 2.3.4 and even after I flash this rom it doesn't stop to enter in recovery mode.
Click to expand...
Click to collapse
Just breezed through this and didn't see this mentioned but in the aocp kitkat forum here it states in the op you must be on cwm 6.0.4.4 or higher to flash their ROM. This is true for all kitkat ROMs I've tried so far. This may have been the source of your problem although usually most report getting a status7 error at this point but I'm not familiar with that cwm version you mentioned.
Also twrp works really well and it's touch based.
creepyncrawly said:
What firmware did you try to flash? If you tried again to flash the "AoCP KitKat from GalaxyS2Root dot com" that you mentioned in your first post, that in itself could be the problem. In the past, many products from the GalaxyS2Root website have caused numerous and various types of problems, including similar to your issue. For most of the past two and a half years, we have been advising people to avoid the Galaxy S2 Root website and products. It is best to flash firmware downloaded from XDA-Developers.
If you are trying to install a version of kitkat on your phone, then you also probably need advice from someone more familiar with kitkat, like cyril279 or SteveMurphy. Maybe one of them will jump in and help.
Click to expand...
Click to collapse
I'm trying to flash a Rom form XDA-Developers http://forum.xda-developers.com/showthread.php?t=2544790
I'll try to contact one of the users you mentioned. Thank you.
razen_kain said:
Just breezed through this and didn't see this mentioned but in the aocp kitkat forum here it states in the op you must be on cwm 6.0.4.4 or higher to flash their ROM. This is true for all kitkat ROMs I've tried so far. This may have been the source of your problem although usually most report getting a status7 error at this point but I'm not familiar with that cwm version you mentioned.
Also twrp works really well and it's touch based.
Click to expand...
Click to collapse
I'll try to flash twrp to flash KitKat. Thank you.
Good catch @razen_kain, the details were in the OP all along.
That said, The details of what you need to flash the firmware are in the OP of each Firmware thread, including the necessary kernel version, and where to find it.
Omni
Cyril279 said:
[...]
Recovery requirement (prior to flashing this firmware):
================
CWM 6.0.4.4+
--OR--
TWRP 2.6.3.0+
-Renderbroken's OmniROM kernel
-or- Flash Omni's Boot.IMG via MobileOdin
--------------------------------
SGH-S959G; (courtesy of @mr-cook)
TWRP 2.6.3.0.zip
--OR--
CWM 6.0.4.5.zip.[...]
Click to expand...
Click to collapse
CM 11
RenderBroken said:
[...]HOW TO INSTALL
Make sure you are on CWM 6.0.4.4+ before flashing ROM! Thanks to @mr-cook you can now download and flash just the recovery/kernel!
Other handy scripts you can use from mr-cook can be found: Here
Download 6.0.4.5 Recovery/Kernel created by mr-cook : Here[...]
Click to expand...
Click to collapse
AOCP 7.0
crt60 said:
HOW TO INSTALL
***(If you are on Jellybean or older, you will need the latest CWM recovery for the i777 to flash this ROM)***
***If you are having trouble with flashing the zip, you can try the odin version from here***​
Click to expand...
Click to collapse
------------------------------------------------------------------------------------------------------
gsilva92 said:
I I rooted my S2 I777 using Frameroot-1.4.2 and flashed via Odin CWM 5.0.2.3 then I flashed AoCP KitKat from from GalaxyS2Root.com and now my phone is in a loop entering in recovery mode.
I flashed the rom on CWM and when I asked to reboot the system it start reboot and enter in recovery mode again.
I tried to flash the official rom from AT&T with Android 2.3.4 and even after I flash this rom it doesn't stop to enter in recovery mode.
Click to expand...
Click to collapse
gsilva92 said:
I'm trying to flash a Rom form XDA-Developers http://forum.xda-developers.com/showthread.php?t=2544790
I'll try to contact one of the users you mentioned. Thank you.
I'll try to flash twrp to flash KitKat. Thank you.
Click to expand...
Click to collapse
If you go back to AT&T stock 4.1.2 I777UCMD8 to start over, here are a couple of ways to get the kernel you need. Please bear in mind that the only kernel that will boot UCMD8 into system is the AJK v4.9 kernel that you used before. When you install another kernel such as RenderBroken's CWM or TWRP kenrel, or the one from OmniRom, the system will no longer boot, but you will be able to boot into recovery, so just avoid trying to boot the system, and choose the option to boot directly into recovery. Or... pull the battery and then use the button combo to enter recovery.
1) Extract the boot.img directly from the OmniRom zip file, and flash that using mobile odin. In this case, once you have UCMD8 rooted, you can skip the step of flashing AJK and flash the OmniRom kernel directly. Reboot into the new recovery and flash OmniRom.
2) Flash the AJK kernel as in my previous instructions. Then enter recovery and flash RenderBroken's kernel. Boot directly into recovery and flash OmniRom.
cyril279 said:
Good catch @razen_kain, the details were in the OP all along.
That said, The details of what you need to flash the firmware are in the OP of each Firmware thread, including the necessary kernel version, and where to find it.
Omni
CM 11
AOCP 7.0
------------------------------------------------------------------------------------------------------
Click to expand...
Click to collapse
I gotta say I didn't read the full info after flash the rom.
creepyncrawly said:
If you go back to AT&T stock 4.1.2 I777UCMD8 to start over, here are a couple of ways to get the kernel you need. Please bear in mind that the only kernel that will boot UCMD8 into system is the AJK v4.9 kernel that you used before. When you install another kernel such as RenderBroken's CWM or TWRP kenrel, or the one from OmniRom, the system will no longer boot, but you will be able to boot into recovery, so just avoid trying to boot the system, and choose the option to boot directly into recovery. Or... pull the battery and then use the button combo to enter recovery.
1) Extract the boot.img directly from the OmniRom zip file, and flash that using mobile odin. In this case, once you have UCMD8 rooted, you can skip the step of flashing AJK and flash the OmniRom kernel directly. Reboot into the new recovery and flash OmniRom.
2) Flash the AJK kernel as in my previous instructions. Then enter recovery and flash RenderBroken's kernel. Boot directly into recovery and flash OmniRom.
Click to expand...
Click to collapse
I did exactly what you said and it worked. Now I'm running OmniRom and I didn't have any problem during the process to flash and not even after.
Thank you everyone.
I'll be more careful next time.
gsilva92 said:
I gotta say I didn't read the full info after flash the rom.
I did exactly what you said and it worked. Now I'm running OmniRom and I didn't have any problem during the process to flash and not even after.
Thank you everyone.
I'll be more careful next time.
Click to expand...
Click to collapse
Welcome to the club :thumbup:
razen_kain said:
Welcome to the club :thumbup:
Click to expand...
Click to collapse
Thank you.

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