[Q] Problems installing CM9 roms with different kernal - Defy Q&A, Help & Troubleshooting

My defy was using cm7 2.3.7. Then I flash the new ICS rom(7-12) and then (23-12), so it is a gingerbread kernal. So when I hope to flash a ICS rom with froyo kernal, do I have to wipe data or is this a must? Thank you

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WajkIUI help

Hello. Can i install wajku normal or ICS version on my cm7 without multiboot? If i install ICS version will i lose my warranty?
I dont understand your question installing cm7 you actually losed your warranty, you can back flashing a full sbf
Motorola Defy CM7 RC 1.5 OC 1GHz
I know i can get my warranty back... but can i get it back by RSD Lite when i install WajkIUI ICS or Stable?
Yes, you cant downgrade only flashing a full sbf with a higher cg ver, flashing via cwm you can back
Motorola Defy CM7 RC 1.5 OC 1GHz
So one more time ( I dont know english so good ) If i install WajkIUI 2.1.6 i can go back with RSD? And can i install this ROM via 2ndinit without flashing back to froyo?
And What if i install 1.12.16 WajkIUI ICS rom?
Yes, just wipe data and cache in stable recovery and flash WajkUI, i didnt tried ICS version,but i think is the same if the ics zip include the gb kernel, do a backup before flashing wiui, then you can back to cm7
Motorola Defy CM7 RC 1.5 OC 1GHz
Ok thx for answer. What should i use for backup?
If you want to back to cm7 after installing wiui or if something goes wrong you can flash again cm7 after wiping data and cache and dalvik and then restore via cwm the backup and you will have the cm7 exactly it was before flashing wiui!
Motorola Defy CM7 RC 1.5 OC 1GHz
Ok I Backup by cyan recovery Thx for help!

[Q] Defy+ doesn't boot CM7 nightly roms

Hello,
I have installed CM7 for Defy(not plus) in my cellphone perfectly.
So then, I found the CM7 Defy+ nightlys and I'm trying to install it. But when I install the ROM on it and reboot, it stays in the initial logo forever.
Could you help me?
Best regards.
please help
Try another rom, like MUIU or any other rom and see if the start loop is overcome.
Did you wipe the memory after?
If you want to instal defy+ nighties, you first have to flash the gingerbread kernel. (CM9kernel.zip)
So now flash the stock ROM and start again. You probably downgraded to instal three normal defy nightly do you have to flash a defy+ ROM with the same bl nr. After that root instal 2nt... and flash the defy+ nightly (and wipe). If you want to be able to switch, you will have to flash the downgrade sbf again and flash the CM9 kernel. Then you can switch with just flashing the kernel and ROM (sbf wipe)
Sent from my MB525 using XDA
i have the rom from here http://forum.xda-developers.com/showthread.php?t=1445259 it has a battery and a camera fix it's really good i'm using it for a month and a half and i don't have any problems
labsin said:
If you want to instal defy+ nighties, you first have to flash the gingerbread kernel. (CM9kernel.zip)
So now flash the stock ROM and start again. You probably downgraded to instal three normal defy nightly do you have to flash a defy+ ROM with the same bl nr. After that root instal 2nt... and flash the defy+ nightly (and wipe). If you want to be able to switch, you will have to flash the downgrade sbf again and flash the CM9 kernel. Then you can switch with just flashing the kernel and ROM (sbf wipe)
Click to expand...
Click to collapse
omg, it works, thank you very much
i have the rom from here http://forum.xda-developers.com/showthread.php?t=1445259 it has a battery and a camera fix it's really good i'm using it for a month and a half and i don't have any problems
Click to expand...
Click to collapse
Do cm7 nightly have these fixes? I'm running nightly now and camera seems ok, but I don't know yet about the battery.

[Q] back to cm7

Hi,
How I can downgrade cm7 from cm9? Normally wipe data&cache and then flash cm7? i haven't backup.
thank you
It depends on which version you're running, if you're using the gingerbread kernel with cm9 then you can't downgrade until you get the froyo kernel. anyway let's assume you have froyo running then a simple full wipe and choose the ROM you want and flash. if you have the gingerbread kernel just full wipe choose the ROM and flash it like before, but you have one more step find the zip with the froyo kernel and flash it right after the ROM.
If you can't be bothered with all the just use a full sbf and start clean from rsdlight.
Sent from my MB525 using XDA

Dowgrading GB to previous kernels

Hi guys,
I accidentally installed GB kernel (2.6.32.9-ge281b6e) on my DEFY (not defy+), when I wanted to try the new CM9...
I really liked ICS but I don't like the fact that the camera is unusable and the battery is leaking really fast. (maybe because of the kernel)
Is there any way I can downgrade the GB Kernel?
Thanks.
Nikola
did u just flashed the small CM9 kernel?
I had cm7 and wanted to instal the cm9.
I went to a thread and downloaded the GB kernel installer (cm9) and installed it from recovery, than the CM9, rebooted and... no return?
Mhhh sounds good. Try to flash the cm9 file again?
sent from XDA app.
nikola986 said:
I had cm7 and wanted to instal the cm9.
I went to a thread and downloaded the GB kernel installer (cm9) and installed it from recovery, than the CM9, rebooted and... no return?
Click to expand...
Click to collapse
Did you wipe cache and dalvik cache before and after the flash? If you haven't, this is the most probable reason for the bootloop. Wipe them now and reboot - you should be fine now. And yes, you can always downgrade kernel, as long as you don't flash a full sbf with higher CG39.smg version.
Sry guys i havent made myself clear enough ... The phone is working fine... But no camera and battery is leaking really fast. Im not stuck in the boot phase aka bootloop... The phone has GB kernel..how to downgrade the kernel?
Just flash CM7 kernel and then a CM7 ROM. Done.

About flashing from CM7 back

This is my first post, I need your suggestions.
I flashed tezet CM7 and installed the first release of CM10. Later on, I flashed tezet "milestone2-kernel-china-2.3.4-4.5.3.zip" before flashing the updated CM10, and now I am using newest CM10, which released on Sep, 05.
My question is can I flash from CM7 (cm7-120221-1901-NIGHTLY-Milestone2) back to Chinese 2.3.4 or Chinese 2.2 ,both the Bootloader = 2 (not BL=3)?
I found that I can flash CM10 back to the previous CM7, which I think the mentioned CM7 maybe suitable for flashing back to Chinese 2.3.4, BL=2.
Or I only can flash from CM7 back to Chinese 2.3.4, of which the Bootloader = 3?
Much appreciate your suggestion in advance and looking forward to hearing from you.
Thank you,
Peter Schneider
I replied to your PM with the same question.
sahilarora911 said:
I replied to your PM with the same question.
Click to expand...
Click to collapse
Hi Sahil,
Thank you for your suggestion.
Since I flashed the CH-GB kernel to run CM10 (released on Sep, 05) based on Tezet CM7 (cm7-120221-1901-NIGHTLY-Milestone2.zip), and CH-GB kernel is downgradable to Froyo, so I became to understand that why I can flash CM10 back to CM7.
I found it is very interesting, because you suggested "You can't go back directly to CM7 from CM10 as the Froyo kernel is not posted anywhere as a standalone flashable zip." But my phone can do this, yesterday, I flashed CM10 based on CM7 (of course, before flashing CM10, I flashed the Tezet's "milestone2-kernel-china-2.3.4-4.5.3.zip"), and then I flashed from CM10 back to CM7 directly. CM7 worked very well.
So my curiosity is: is because I flashed Chinese 2.2 sbf (Version:2.6.0, BL=2) before flashing CM9 (Alex's) and later CM7 (tezet's), then I can flashed from CM7 to CM10, or from CM10 back to CM7 without any problem?? If it is, can I flash directly from CM7 (downgrade from CM10) to Chinese 2.2 sbf (Version: 2.6.0, BL=2)??
Thanks for your advice.
Best Regards,
Peter
I'm not a 100% sure but may be it's because Tezet's CM7 might be containing the Froyo kernel as part of the flashable zip. And you can flash froyo kernel over CH-GB kernel.
I personally prefer ROMs based on CH-GB kernel as there is no multi-touch bug in CH-GB kernel, so I can't remember much about CM7 by tezet.
Thank you very much for your advice.
I tried before, I can not in official wipe mode (X+power) after flashing CM10, but I can in RSD flash mode. After downgrade from CM10 to CM7, I can both in official wipe mode and RSD flash mode. So I assume back to Chinese 2.2 (version 2.6.0, BL=2) is possible, just not sure. Maybe flash Chinese 2.3.4 (released in September, 2012, which can downgrade back to Chinese 2.2) is more suitable. Just not sure.
I became to understand on this matter: I used Chinese 2.2 (2.6.0) first, then flashed someone`s CM9 (CH.zip), which may haved contained downgradeable CH─GB kernel, so I was able to upgrade to aother Chinese guy`s CM10, which may also contained downgradeable CH-GB kernel, and so I can downgrade to tezet`s CM7 directly, and able to use CM10. I can`t directly upgrade from CM7 to CM10, need flash CH-GB kernel before CM10.
Maybe my assuming is right, just not sure.
Anyone could answer that?
Thank you,
Peter Schneider
Sent from my A953 using xda app-developers app
You are totally right!
I did the same thing some weeks ago. I was in cm7 and flash cm10, but before I had to flash ch kernel.
I did the same thing when I flashed alex's CM9 (flash ch kernel first).
I believe tezet's cm7 has a froyo kernel inside, instead of cm9 and cm 10 (edit: sahilora already said this, now I saw...lol)
Sent from my MotoA953 using xda premium
Thanks man!
BTW, would you suggest to flash Chinese 2.2 (version 2.6.0, BL=2) or Chinese 2.3.4 (which can downgrade back to 2.2) directly from CM7 (which downgrade from CM10)?
Thank you for your suggestion!
Sent from my A953 using xda app-developers app
I prefer Tezet's cm7. He did some improves some days ago (last version 1st. september) and now we have OTA updates...
Sent from my MotoA953 using xda premium
Thanks man.
Sent from my A953 using xda app-developers app

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