Develop Bugs

Cyanogen boot loop

i have googled this and tried multiple ways of installing it but i always get a boot loop. Whats going on?

Hey if you just want to get your phone back again, just flash another firmware from the one you used. Should start up just fine.

have done already but i actually want to install cyn mod. I managed to get as far as the main screen buit then immediately reboots. I cant find wifi modules for latest doom kernel either they arent in his thread.

FLASH KERNEL FIRST (from cyanogenMOD or doomkernel for CM7 etc)
Than flash cyanogenMOD
any other way will make your phone bootloop.

I think you have to unlock BL via SE in order to flash CM..
of course you would likely broke your warranty.
this based on my experience (I'm a newbie too in the android's world). this is what I've done :
1. unlock BL via SE (not all carriers allowed this!)..
2. flash .42 fw
3. follow the instructions given on CM thread by fxp.
it's worked for me.
goodluck.

I've had this problem before. Did you wipe the delvic cache, wipe data/factory reset and wipe cache partition in CWM before you flashed the update.zip?

It would seem it was a specific version of cm that was making it bootloop the one from dooms thread 7.2.0 works fine and also the one before the latest stable release also worked fine. I however found a problem with the spacebar on the keyboard when using the phone in landscape so am now going to try arconium and doom kernel its a shame really because cm from what i used of it looked really nice.

Try 7.1.0.1.
I got bootloop too with 7.1.0.2

Kuroyukii said:
Try 7.1.0.1.
I got bootloop too with 7.1.0.2
Click to expand...
Click to collapse
Aye thats the one i used but ended up having a problem with the spacebar not working in landscape so am on acronium now which is all good but superuser keeps crashing meh always something eh.

at first im also having the same problem,just follow the instruction by FXP : flash bb56,flash fw.42,flash FXP kernel via fastboot,flash update via recovery,wipe dalvik cache,reboot..
Sent from my LT18i using Tapatalk

I have this exact same problem
I've done everything I was supposed to, I think, and still doesn't work. It boots, shows me the little Android "Welcome!" screen, and before I have time to press anything or begin setting up my device, it reboots into the Cyanogenmod loading screen. I've tried different kernels, different basebands, every time wiping Dalvik cache, etc. and it REFUSES to work. I'm pretty desperate by now because I really wanted to use this ROM so any help is greatly appreciated.
I also followed precisely rashid.fairus' instructions and it still does the exact same thing.

You need to Wipe Data, Cache and Dalvik ----- BEFORE AND AFTER FLASH
I do this here, and positive feedback

Velcis Ribeiro said:
You need to Wipe Data, Cache and Dalvik ----- BEFORE AND AFTER FLASH
I do this here, and positive feedback
Click to expand...
Click to collapse
Sometimes you DON'T WIPE ANYTHING AT ALL. Just flash CM and Google.
Works for me on Xperia Acro S.

gabantarung said:
Sometimes you DON'T WIPE ANYTHING AT ALL. Just flash CM and Google.
Works for me on Xperia Acro S.
Click to expand...
Click to collapse
Only when you upgrade to a later version of the same ROM.
Sent from my Xperia Arc S using xda premium

Velcis Ribeiro said:
You need to Wipe Data, Cache and Dalvik ----- BEFORE AND AFTER FLASH
I do this here, and positive feedback
Click to expand...
Click to collapse
Wipe dalvik and cache when upgrading to later version, wiping data will reset phone to factory settings and you lose all personal data.
僕のLT18iから送られてきた

Please Help

Hi, i was helping a friend install a custom rom, on his xperia s. And seems i might have messed up. i need help urgently. i rooted the phone and installed cwm. i can access the recovery. i tried flashing Hybrid MooDeD JB-ICS but the phone doesnt boot. The screen stays black. i wiped cache, dalvik cache and also did a factory reset. What should i do? i even tried to repair the phone using pc companion and it isnt working! I rooted and installed the recovery using the flash tool.

Flash stock rom with flashtool.
Sent from my LT18i using xda premium

where can i get the stock rom?

mazlano27 said:
Hi, i was helping a friend install a custom rom, on his xperia s. And seems i might have messed up. i need help urgently. i rooted the phone and installed cwm. i can access the recovery. i tried flashing Hybrid MooDeD JB-ICS but the phone doesnt boot. The screen stays black. i wiped cache, dalvik cache and also did a factory reset. What should i do? i even tried to repair the phone using pc companion and it isnt working! I rooted and installed the recovery using the flash tool.
Click to expand...
Click to collapse
Ok if you can access recovery then get out the sd card and put it in another working phone then add few more default ROM-s and try them till it's boot.because maybe problem is kernel and you dont know what kernel is in there.
Or just try to flash an other proper kernel.

mazlano27 said:
Hi, i was helping a friend install a custom rom, on his xperia s. And seems i might have messed up. i need help urgently. i rooted the phone and installed cwm. i can access the recovery. i tried flashing Hybrid MooDeD JB-ICS but the phone doesnt boot. The screen stays black. i wiped cache, dalvik cache and also did a factory reset. What should i do? i even tried to repair the phone using pc companion and it isnt working! I rooted and installed the recovery using the flash tool.
Click to expand...
Click to collapse
Screen on "SONY LOGO" ?

u should go to the xperia s q&a mate
Sent from my LT18i using xda premium

mazlano27 said:
where can i get the stock rom?
Click to expand...
Click to collapse
First of all, don't post questions in the development section, to answer your question, read the guides and stickys which should have been your first port of call.

no real need to put sd card in another phone.
just boot into cwm, goto mounts and storage. and look for something like mount USB storage.
and voila, your sd card will appear on your pc.
p.s try wiping /system from mounts and storage and flashing rom again

emwno said:
no real need to put sd card in another phone.
just boot into cwm, goto mounts and storage. and look for something like mount USB storage.
and voila, your sd card will appear on your pc.
p.s try wiping /system from mounts and storage and flashing rom again
Click to expand...
Click to collapse
Never new that was what mount usb storage did. Thank you
Sent from my LT18i using xda premium

First if you want a custom rom on your phone, you will probably need a custom kernel ass well . Kernel is the bios for your phone and rom the OS. Go to the Rom thread and read there witch kernel is recommended for that rom. After flashing the kernel, go to CWM (Recovery) and flash the custom Rom and finally flash the wifi modules associated to that kernel.
CM based Roms does not work at all with stock kernels, they have their own kernels.
If you want a recommendation (for Kernel, Rom, baseband) look in my signature, you have links included !
Don`t forget the procedure for installing custom Rom (wipe everything : factory default, /system, /data, /dalvik) and only after wiping all install the rom.

Problems (assumed):
1. Locked bootloader
2. Didn't flash kernel
Fixes:
1. Unlock bootloader
2. Flash kernel via flashtool.

[Q]Why do i have problems with installing custom roms

I have locked bootloader, and rooted Arc S. ICS .587. Whenever i try to install custom rom, usually it demands cache and dalvik to be wiped and i do it. But when iinstall it, (i tried 2 roms on with aroma instaler and one without) and on both i got bootloop. Whenever i tried to install mod that also required wiping cache and dalvik i also always got bootloop. When i dont wipe it phone can boot, but features that i wanted to install dont work properly.
I am really intrested in installing custom rom, can anyone help me??? :crying:
Thanx in advance!

Re-read the instructions of whatever you're flashing and keep trying.

Very useful...

DjDexter5GHz said:
Very useful...
Click to expand...
Click to collapse
Not a lot more to suggest when People make such vague posts.

Usually you should make factory reset and format /system
Have you?

DjDexter5GHz said:
I have locked bootloader, and rooted Arc S. ICS .587. Whenever i try to install custom rom, usually it demands cache and dalvik to be wiped and i do it. But when iinstall it, (i tried 2 roms on with aroma instaler and one without) and on both i got bootloop. Whenever i tried to install mod that also required wiping cache and dalvik i also always got bootloop. When i dont wipe it phone can boot, but features that i wanted to install dont work properly.
I am really intrested in installing custom rom, can anyone help me??? :crying:
Thanx in advance!
Click to expand...
Click to collapse
Pls specify which custom rom you wanna install we can help you more. Check out the link at the bottom of my signature if you're new here. Do some reading.
Sent from my LT15i using xda app-developers app

[Q] Help with custom ROM on locked bootloader.xperia arc

Hi All,
I have xperia arc rooted with locked bootloader.
I have installed Xperia arc s .431 ROM to increase memory.
and now i want to install custom ROM which can be installed on locked bootloader.
I have tried following ROMS
Viper ROM :-
URL:- http://forum.xda-developers.com/showthread.php?t=2128642
---------------------------------------------------------------------------------------------------------------------------------------
Xperia T ICS Rom V6.9.2 For Arc / Arc-S, Based on (4.0.4) 587 [15th-Feb-2013
URL:- http://forum.xda-developers.com/showthread.php?t=1746508
---------------------------------------------------------------------------------------------------------------------------------------
Racing Bean v2.2
URL:- http://forum.xda-developers.com/showthread.php?t=2093720
Every time i followed their process.and stuck up at sony logo...
Every time it stucks up at sony logo and phone doesnt shut down.... SONY logo displays until we take out battery.
Phone gets soft bricked .....
I have tried with flashing stock kernel but nothing happens please help... i want to install custom ROM

Have you formatted system, data, cache partitions? I had similar problem with flashing a stock based rom because of such a stupid mistake.

pypcier said:
Have you formatted system, data, cache partitions? I had similar problem with flashing a stock based rom because of such a stupid mistake.
Click to expand...
Click to collapse
Formatting /system on locked bootloader is the stupidest thing to do (I guess). You basically delete the Recovery and get in trouble.

You guessed wrong because some stock based roms require system partition to be formatted and not doing this caused some serious problems for me also flashing back to stock with flashtool is like pushing one button and then waiting for 5 minutes for flashing to complete so I don't see a problem here.

pypcier said:
You guessed wrong because some stock based roms require system partition to be formatted and not doing this caused some serious problems for me also flashing back to stock with flashtool is like pushing one button and then waiting for 5 minutes for flashing to complete so I don't see a problem here.
Click to expand...
Click to collapse
I have done every time these steps.
Factory reset
Wipe cache
Wipe delvik cache
Format system
Install rom from cwm.
Again clear cache and reboot gives me stuck at sony logo

I take it your phone as it should if you install stock ftf try ultimate hd just out of curiosity
Sent from my LT15i using xda premium

I think I see a cause of your problems now... your rom is .431 but two of these roms base on .587 firmware and third one requires a custom kernel so try again with .587 kernel and report if this helped.

pypcier said:
I think I see a cause of your problems now... your rom is .431 but two of these roms base on .587 firmware and third one requires a custom kernel so try again with .587 kernel and report if this helped.
Click to expand...
Click to collapse
So please can you tell me the correct sequence to put custom rom....?
1st install kernel and then rom or or install the rom and then kernel?

It would be the best if you could unlock your bootloader but if you can't or don't want to then:
Download and flash this https://www.dropbox.com/s/957gfo1kaf7pefe/LT18i_4.1.B.0.587_(1254-2716).ftf (its stock untouched .587 ftf for arc s that I've used many times)
Root then install CWM with x-parts
Reboot to CWM format data cache system and dalvik cache
Install your rom
Reboot
And remember that you can use only stock based roms so racing bean wont work.

[Q][Resolved] Freezing after install any kernel.

Hi guys,
Im facing problem here, if i install any firmware my rom getting freeze, Kindly assist me pls.
.587
Already unlocked bootloader
Already root my device
i follow the instruction to install kernel
Thanks in advance.
Edit:
Case resolved.
It was my mistake. at last i learned from mistake
to go to recovery mode shud press Back button.
thanks for the reply guys.

Does flashtool show any bad blocks?? Can you see the kernel logo??

Do you wipe your dalvik cache after changing kernel? If not then the rom will probably fail.

With full wipe?

LoneWanderer said:
Does flashtool show any bad blocks?? Can you see the kernel logo??
Click to expand...
Click to collapse
No bad blocks. its hang at kernel logo. im unable to reboot cwm as well. i did follow the instruction well
i tried fastboot & flashtool both giving same freezing issue.

sinkster said:
Do you wipe your dalvik cache after changing kernel? If not then the rom will probably fail.
Click to expand...
Click to collapse
after delete dalvik cache also still remain same

rod555 said:
With full wipe?
Click to expand...
Click to collapse
do i need to do the full wipe before install the kernel or after?

you dont need to wipe data after installing a kernel. but you should wipe data and dalvik...
Sent from my Xperia Arc S using xda premium