【Question】About the Kernel(boot.img)using - Defy Q&A, Help & Troubleshooting

The lasest CM7 and CM9 based on froyo kerenel or gb kernel which are using the same boot.img kernel from foryo or gb.
I wonder why does these build use the boot.img by adviced?
May some system files are from this kernel boot.img ?
Is there any relationships?
or just you adviced to use this kernel by no reason just with feeling good?
or could we use the other boot.img from the other froyo one or gb one?
Thanks!

You can have a try .hoho

[email protected] said:
The lasest CM7 and CM9 based on froyo kerenel or gb kernel which are using the same boot.img kernel from foryo or gb.
I wonder why does these build use the boot.img by adviced?
May some system files are from this kernel boot.img ?
Is there any relationships?
or just you adviced to use this kernel by no reason just with feeling good?
or could we use the other boot.img from the other froyo one or gb one?
Thanks!
Click to expand...
Click to collapse
firstly, there are many differences between froyo kernel and gingerbread one. such as the camera driver(green lens and red lens), the 3d driver and sth else. that's the reason it is hard to build a rom which can boot based on either two kernels.
secondly, there are differences among froyo(gb) kernels. e.g. remember there's one time we cannot boot into bootmenu with the asia froyo kernel? it shows there must be some differences among froyo kernels, although not as many as differences between froyo and gb kernel.
i think things above explain why there's always a recommend kernel. devs are working on the rom based on a specific kernel, and have no time to test it compatibility with other resembling kernels, although sometimes there's no compatibility problem.

Related

[Q] Defy Plus MIUI

I am currently trying to get full battery of my defy+ to work under MIUI. Being CM based i assumed it would work with the CM battery patch. It doesn't however. I know which files need to be replaced, would it be a good idea to just grab the files from the CM9 defy+ build and replace them?
For those that are interested doesn't work = battery only showing full with question mark icon.
Having same problem and seems there is total silence in all forums concerning this issue. If you manage to solve it please let me know !
Hey, guys I'm using MIUI Pikachu Edition by einsteinno1 and it has full DEFY+ support (battery charges up to 100%)
It's overall an awesome ROM, after trying CM7.2, latest WIUI and MS2G v3, Pikachu is the best one for me.
My DEFY+ was on 2.3.5, so I flashed it down to Froyo before flashing Pikachu
Cheers!
I have the same Defy 2.3.5 but I don't know how to install a diffrent ROM/interface ...
iceguy0585 said:
I have the same Defy 2.3.5 but I don't know how to install a diffrent ROM/interface ...
Click to expand...
Click to collapse
Search this wonderful Forum - There are many threads telling you how to install a new ROM / interface
Well then I will definitely give Miui Pikachu edition a try As far as I understand Froyo version is the best to use to flash Miui right ?
Hi all,
About the Defy+ battery. This battery is only support by GB kernel. So nevermind the patch you applied, you'll always have a bad result. This patch works on CM 7.2 Defy + because this rom doesn't incluse the kernel and use the GB one of your phone.
So the only solution is what nisky+ said... Flash before the 2.3.6 SBF on the dev forum who allow you to flash a Froyo kernel first...
http://forum.xda-developers.com/forumdisplay.php?f=855
DeanSebastian said:
Well then I will definitely give Miui Pikachu edition a try As far as I understand Froyo version is the best to use to flash Miui right ?
Click to expand...
Click to collapse
Froyo is the safest way, yes, and it will work without problems. It should work when flashed over 2.3.4, too, but I haven't tried that, myself.
@mdt24 Then how come I don't have battery problems now when Froyo's kernel is used
P.S. It's niksy, not nisky
Hi niksy ;-)
It's because I think this rom doesn't incluse kernel, so you always run a 2.3.4 GB Kernel...
quote from Miui Pikachu edition : IMPORANT!!! this Rom works only on Defy or Defy+ with Froyo Kernel or Gingerbread 2.3.4/5 Kernel. All with 2.3.6 Kernel have to downgrade to Froyo Kernel, because the new Motorola Kernel won't work with MIUI. Just use this Tutorial on XDA Developers
But I could be wrong in my deduction, so Please, can you give us the number of the kernel you have with this pikachu rom ?...
What I did before was downgrade from 2.3.6 using the sbf the dev provided that allows you to downgrade to froyo then I flashed Miui official rom and still had problems with battery. Kernel version currently is : 2.6.32.9gb08c3c8 if that makes any sense to you cause I personally just don't know anything bout kernels... I just downloaded pikachu Miui and will give a try soon and share the results with you
Hey all, thanks for the replies. I already know about the limitations of the patch and which versions the driver works with. That is why i flashed the 2.3.4 kernel before using MIUI and therefore the defy + patch. I just don't get why it doesn't work, do i need to use a defy+ kernel?
I will grab the files used in the working MIUI Defy+ rom and package them as a flashable .zip for other users.
mdt24 said:
Hi niksy ;-)
It's because I think this rom doesn't incluse kernel, so you always run a 2.3.4 GB Kernel...
quote from Miui Pikachu edition : IMPORANT!!! this Rom works only on Defy or Defy+ with Froyo Kernel or Gingerbread 2.3.4/5 Kernel. All with 2.3.6 Kernel have to downgrade to Froyo Kernel, because the new Motorola Kernel won't work with MIUI. Just use this Tutorial on XDA Developers
But I could be wrong in my deduction, so Please, can you give us the number of the kernel you have with this pikachu rom ?...
Click to expand...
Click to collapse
Mate, you are right about the ROM, it doesn't include any kernel, but I said that I flashed that special version 6 Froyo (that's a full sbf) before flashing Pikachu!
DeanSebastian said:
What I did before was downgrade from 2.3.6 using the sbf the dev provided that allows you to downgrade to froyo then I flashed Miui official rom and still had problems with battery. Kernel version currently is : 2.6.32.9gb08c3c8 if that makes any sense to you cause I personally just don't know anything bout kernels... I just downloaded pikachu Miui and will give a try soon and share the results with you
Click to expand...
Click to collapse
The kernel you mentionned is a froyo kernel...
As you all I try to understand why it's possible that the defy+'s battery works or not with the patch. It's sure it works with a 2.3.6 GB kernel and a patch for the system (battd, lib) used by the rom if the new rom doesn't include a kernel.
It seems that if the rom include a froyo kernel the patch doesn't work...
So... may be a way to understand
---------- Post added at 03:56 PM ---------- Previous post was at 03:43 PM ----------
niksy+ said:
Mate, you are right about the ROM, it doesn't include any kernel, but I said that I flashed that special version 6 Froyo (that's a full sbf) before flashing Pikachu!
Click to expand...
Click to collapse
Yes but I'm pretty sure than this special version has a GB kernel. It's just the bootloader who accept all kind of kernel...
Check your Kernel number, I think you must have something like this 2.6.32.9-gbdd614e...
Ok after some testing I can tell you that the battery charged to 100% only the first time I booted.Since then it has only charged till 90%. I also did calibrate the battery the first time I flashed the Rom but no results
mdt24 said:
Yes but I'm pretty sure than this special version has a GB kernel. It's just the bootloader who accept all kind of kernel...
Check your Kernel number, I think you must have something like this 2.6.32.9-gbdd614e...
Click to expand...
Click to collapse
It's 2.6.32.9-gb08c3c8 - the one you said it's Froyo Just checked!
And for the battery... First time it charged to 100%, this time it stuck at 90%. Quite weird... But, that is with Froyo kernel, as we've come to conclude.
But, on the other hand, my bro's got a DEFY+, too, with CM7.2 on it and with Gingerbread kernel (27th January DEFY+ nightly) and the battery goes to 100% every time. I will test Pikachu on a Gingerbread kernel, cause I can't really live with this bug :-/ Will let you know how it went, now I'm off to find a 2.3.4 sbf!
I had the same idea and have already downloaded a full 2.3.4 GB sbf to check just that !
i wish a 2.3.4 GB kernel can fix that, although I think the only kernel able to fix this is 2.3.5 and above
Hi.. I m new to android... I just want to ask how can I add music contol to notification toogle bar like that in cm mod..... I m using pikachu edition on my defy plus and its really great ... I haven't faced any problem till now.. thank u dev for such a beautiful rom...
hey buddy....i was runing on 2.3.5 than i tried a rom called [Retail British] here ; http://sbf.droid-developers.org/umts_jordanplus/list.php
then
i upgreade it by automatic update so it became 2.3.6
then i again flash it through [Retail British] after that my device not able to power on just with white led light but i'm able to flash the device ..so can u suggest me a suitable rom for my device [Motorola defy+] ??
HELP pls
Thanks !!
mdt24 said:
Hi niksy
It's because I think this rom doesn't incluse kernel, so you always run a 2.3.4 GB Kernel...
quote from Miui Pikachu edition : IMPORANT!!! this Rom works only on Defy or Defy+ with Froyo Kernel or Gingerbread 2.3.4/5 Kernel. All with 2.3.6 Kernel have to downgrade to Froyo Kernel, because the new Motorola Kernel won't work with MIUI. Just use this Tutorial on XDA Developers
But I could be wrong in my deduction, so Please, can you give us the number of the kernel you have with this pikachu rom ?...
Click to expand...
Click to collapse
Thanks for ur Info.. tried to install Pikachu edition on my Defy+ 2.3.6 nd failed. But now using CM10..

[Q] About Kernels and CM9

First of all, I'd like to thank all you guys for all great work here on XDA, thank you very much!!
I have a Motorola Defy (MB525) with Red Lens and although I've changed the ROM of my Defy many times, I'm still new and I have some questions:
The first ROM I've installed on my Defy, was CM7 (unofficial, ported from Quarx), then changed to MIUI, then came back to CM7 (official) and now, I'm using CM9 (24/Feb) from Epsylon3/Quarx (from this thread http://forum.xda-developers.com/showthread.php?t=1432100 ) and this build is for Froyo Kernel, and, in this same thread, I've read that GB Kernel is better for CM9 and my Red Lens Defy...
My question is: can I flash CM9 for GB (with GB Kernel) and later return to CM9 for Froyo (and Froyo Kernel), or MIUI, or CM7 if I wanted to??
If I flash CM9 for GB (with GB Kernel), can I go back to stock if I need to??
Well, sorry for this noob questions and sorry for my bad english
well, my personal opinion is, that GB is always better for defy with red lens... only reason for froyo is the missing green lense support in gb, i think ...
i also think, that the kernel for these cm9 roms are flashed with an fixed sbf ... so it doesn't matter, what you have as stock system ...
that is no pro-answer, just a few thinks, i've read and hopefully understood ...
the whole romchange of defy is not easy to understand cause of that locked bootloader things and so on ... i also got a crazy problem with my defy+ as you can read in my thread ...
hopefully, we will get the answers we need to get our systems running as good as we like ...
DJ_Synergy said:
well, my personal opinion is, that GB is always better for defy with red lens... only reason for froyo is the missing green lense support in gb, i think ...
Click to expand...
Click to collapse
Does that mean that those of with green lenses won't be able to upgrade to gb kernel if we want our cameras to work? (i mean by the time there's a cm9 stable)
i flashed cm9 feb. 29 release in my green lens defy.. and have camera preview with autofocus on it.. btw i flashed the cm7 kernel.. and i think cm7 kernel is froyo kernel.. cm9 kernel is gingerbread kernel.. anyone can elp me? how to move apps from phone to sd card?
I've found this:
fritolays said:
I packed the two different kernels into clockwork flashable packages.
1. Flash either a nightly or restore a nandroid.
2. Flash either CM7_Kernel-signed.zip or CM9_Kernel-signed.zip; depending on what you've installed.
3. Reboot.
CM7_Kernel-signed.zip
CM9_Kernel-signed.zip
Click to expand...
Click to collapse
in this thread: http://forum.xda-developers.com/showpost.php?p=20148046&postcount=1624
that means that I can go to CM9 (with GB Kernel) and then, if I want/need to, go back to CM9 (with Froyo Kernel) or any ROM based on Froyo Kernel, right??
simonardejr said:
I've found this:
in this thread: http://forum.xda-developers.com/showpost.php?p=20148046&postcount=1624
that means that I can go to CM9 (with GB Kernel) and then, if I want/need to, go back to CM9 (with Froyo Kernel) or any ROM based on Froyo Kernel, right??
Click to expand...
Click to collapse
You're right. I did this and works. Just flash the kernel based on the corresponding ROM and you're good to go.

[Q] Motorola Defy Kernels

hi guys, I would like to ask experienced users what is the difference between the kernels we used on our Defy(s)
Froyo Kernel vs Gingerbread kernel vs Walter79's Kernel
I first encountered this kernel upon viewing the CM9 update thread
I have a red lense defy and the very first rom I flashed was the official CM7.1 so I am aware I do have a Froyo Kernel running on this bad boy.
what is the difference/ advantages?
which is better?
is it safe to flash one over the other?
is it easy to flash? like how we flash roms? we can always go back to to Froyo kernel from the gingerbread or walter kernel and vice versa?
I think a lot of noobs would appreciate your answers.
I will edit this post and add your answers so that others may find it useful as well
some answers--------------------------------------------
arpith.fbi said:
what is the difference/ advantages?
Ans:My experience says that the main advantage of using GB kernel is battery life..
Defy-4.5.3-109_DPP-11-kernel is well known for awesome battery life.
which is better?
Ans: I personally think Walter79's kernel is better in every sense.Unfortunately for old defy owners(SOC camera green lens), camera wont work on new kernels without any extra fix..
is it safe to flash one over the other?
Ans: Yea its 100% safe..i personally never had any problem as such..but i heard few people faced bootloop..in any case you can always go back to froyo or watever kernel u were using
is it easy to flash? like how we flash roms? we can always go back to to Froyo kernel from the gingerbread or walter kernel and vice versa?
Ans: As i have already mentioned above, we can always switch between these kernels..just remember not to flash any GB kernel based sbf or else u will be stuck! before flashing any unknown or less known kernel PLEASE USE THE SEARCH option and know more about the kernel and related problems.
All the best
Click to expand...
Click to collapse
CjRudi said:
i would add, that many people state that GB kernel (2.3) has much better 3d performance - games are running much better than on froyo kernel.
It's easy and safe to switch between kernels, you should only remember that switching kernel must come with installing appropriate rom
Click to expand...
Click to collapse
what is the difference/ advantages?
Ans:My experience says that the main advantage of using GB kernel is battery life..
Defy-4.5.3-109_DPP-11-kernel is well known for awesome battery life.
which is better?
Ans: I personally think Walter79's kernel is better in every sense.Unfortunately for old defy owners(SOC camera green lens), camera wont work on new kernels without any extra fix..
is it safe to flash one over the other?
Ans: Yea its 100% safe..i personally never had any problem as such..but i heard few people faced bootloop..in any case you can always go back to froyo or watever kernel u were using
is it easy to flash? like how we flash roms? we can always go back to to Froyo kernel from the gingerbread or walter kernel and vice versa?
Ans: As i have already mentioned above, we can always switch between these kernels..just remember not to flash any GB kernel based sbf or else u will be stuck! before flashing any unknown or less known kernel PLEASE USE THE SEARCH option and know more about the kernel and related problems.
All the best
thanks for the answer, somehow it has enlightened me
any more answers? which kernels allow 720p recording?
i would add, that many people state that GB kernel (2.3) has much better 3d performance - games are running much better than on froyo kernel.
It's easy and safe to switch between kernels, you should only remember that switching kernel must come with installing appropriate rom
arpith.fbi said:
what is the difference/ advantages?
Ans:My experience says that the main advantage of using GB kernel is battery life..
Defy-4.5.3-109_DPP-11-kernel is well known for awesome battery life.
which is better?
Ans: I personally think Walter79's kernel is better in every sense.Unfortunately for old defy owners(SOC camera green lens), camera wont work on new kernels without any extra fix..
is it safe to flash one over the other?
Ans: Yea its 100% safe..i personally never had any problem as such..but i heard few people faced bootloop..in any case you can always go back to froyo or watever kernel u were using
is it easy to flash? like how we flash roms? we can always go back to to Froyo kernel from the gingerbread or walter kernel and vice versa?
Ans: As i have already mentioned above, we can always switch between these kernels..just remember not to flash any GB kernel based sbf or else u will be stuck! before flashing any unknown or less known kernel PLEASE USE THE SEARCH option and know more about the kernel and related problems.
All the best
Click to expand...
Click to collapse
Thanks for this information bro!!
Please also share Camera fix (link) for GB kernel for SOC Camera and also mentioned whether downgrade is possible. Your help will be appreciated.
anyone correct me but we can do dual boot but can't install dual kernels?
say
cm7 (froyo kernel ) as system
cm9 (gingerbread kernel) on SD
and will Gingerbread kernel work with cm7 for the defy, red lense?
chachoi said:
anyone correct me but we can do dual boot but can't install dual kernels?
say
cm7 (froyo kernel ) as system
cm9 (gingerbread kernel) on SD
and will Gingerbread kernel work with cm7 for the defy, red lense?
Click to expand...
Click to collapse
No, can't do it. Both ROM's should share the same kernel.
thanks Auris, would you be able to add anything or negate anything that was previously posted about the Defy Kernels?
Please help me a bit with those kernels! I have a defy+ with 2.3.6 base and one of those newest official build nandroids. Can I flash Walter's kernel? ^^
Just don't want any bootloader error!
Sent from my Defy+ using xda premium (app needs update!)
M on froyo kernel running cm7.2
Can I flash gb kernel? Also m having green lens.
Will the camera work on walters69 kernel?
[email protected]
thanks
thanks, guys. i've been looking for the answers
Is it okay to flash defy+ rom zip and then the gb kernel on a green lens defy? To me battery life is more important than camera
chachoi said:
thanks for the answer, somehow it has enlightened me
any more answers? which kernels allow 720p recording?
Click to expand...
Click to collapse
Walter79's kernel allows 720p recording for defy red lens.
Defy kernel Flash
i have a motorola defy green lens currently running cm9 4.0.4 (camera's not working but i don't care much for the camera ) . ok here's my problem i'm trying to flash a different kernel on my defy.. the current kernel im running is 2.6.32.9 cdt 2011 but i need better performance and i tried to flash semaphore kernel. the flash was successful but i see no changes and also in the settings>about phone the kernel version hasnt changed. i need help so that i can flash new kernel properly.. thanks
Hi!
I realize this is a very old thread, but it seems to be one of the few addressing the (dis)advantages of the froyo vs the GB kernel (independently of the ROM!).
The 720p-recording is really not important to me, but battery life is and I just read here that it would be better on GB kernel.
Do any of you have further experience with regards to battery-life difference between Froyo and GB kernels (not ROMs)!? Is it a big difference (to what extent or through which features?)
I have a MB525 with red lens and Froyo kernel, so I could go for a GB-kernel.
I've recently rooted my smartphone and flashed WIUI (3.1.27, GB&MIUI-based) on it, because (1) my phone was slowing down, (2) I wanted not to have any bloatware anymore and (3) I wanted some apps that only run on Gingerbread/2.3+ (e.g. the offline-language-package-feature from Google Translate). Almost everything is now better.
BUT, my battery life got worse! I've now down-volted my smartphone to a stable point and set it to 'smartassv2', but am looking for further improvement for the battery life. As WIUI can be installed both on froyo and GB-kernel, I might also update the Kernel...but only want to take the plunge if it really would make a difference...
any advice or experience is welcome!

[Q]Latest/Best Kernels for Froyo and Gingerbread

For the sake of updatedness, what are the best kernels for Froyo and Gingerbread?
Also, I flashed a GB kernel to try out a CM9 build. Now I want to install the official 7.2 RC. I need to flash a Froyo kernel again right?
There are no custom kernels for the defy as it has a locked bootloader, only the official signed motorola ones, the froyo which came with defy and gb which came with defy+.
For cm7 you need froyo kernel, just reflash it. Cm9 have 2 builds - one for froyo kernel and one for gb kernel. I think the green lense defys may only work with froyo kernel.
Sent from my MB526 using XDA
sim0t said:
There are no custom kernels for the defy as it has a locked bootloader, only the official signed motorola ones, the froyo which came with defy and gb which came with defy+.
For cm7 you need froyo kernel, just reflash it. Cm9 have 2 builds - one for froyo kernel and one for gb kernel. I think the green lense defys may only work with froyo kernel.
Sent from my MB526 using XDA
Click to expand...
Click to collapse
What abt the DHT kernel from Walter. I think its not ripped from defy or defy+.
It is used in Motoginger roms
Hi, sorry for my first noob question ...
Quite the same question as the original :
I found here on the github (I can't post link) that 2.2.2-177 & 2.2.2-179 have a different Kernel hashes 2.6.32.9-ga28fcc4 or 2.6.32.9-gb08c3c8.
I thought the latest CM7.2 were containing the lastest kernel id 179.
When I look at mine I have 2.6.32.9-ga28fcc4, which seems to be 177 ...
I'm actually on cm7.2 20120509-NIGHTLY-jordan, from the official nightlies ...
here (on the dowload page from Epsylon3, can't post ...) i found the 179 kernel, would it be necessary to flash it in order to have a matching kernel with the lastest nightlies ?
Only talking of froyo kernels ...
sim0t said:
There are no custom kernels for the defy as it has a locked bootloader, only the official signed motorola ones, the froyo which came with defy and gb which came with defy+.
Click to expand...
Click to collapse
So do I think. However some people are often saying that they flashed a cm9 or whatever kernel... what do they mean by this.
P.S.: There are some attempts to boot another kernel with the help of kexec/2ndboot, but currently only with minor succes afaik.

[Q] Changing from CM10 to Danik MS2Ginger 4

I´m currently using CM10 by Tezet, and I have flashed the GB kernel that Tezet put in his post. It all works nice and well, but I wanted to try Danik's MS2Ginger. Does anybody know if it works well without flashing the custom kernel from Danik? Can I just keep my current kernel? If possible, I'd appreciate the opinion of someone who has tried this.
Thanks in advance!
PS: On a side note, my current kernel (CM10) is named: 2.6.32.9- Jellybean, etc, etc. I had the impression that the Linux Kernel for Gingerbread (that is to say, the GB Kernel) was 2.6.35. Why keep the froyo kernel number?
fischer22 said:
I´m currently using CM10 by Tezet, and I have flashed the GB kernel that Tezet put in his post. It all works nice and well, but I wanted to try Danik's MS2Ginger. Does anybody know if it works well without flashing the custom kernel from Danik? Can I just keep my current kernel? If possible, I'd appreciate the opinion of someone who has tried this.
Thanks in advance!
PS: On a side note, my current kernel (CM10) is named: 2.6.32.9- Jellybean, etc, etc. I had the impression that the Linux Kernel for Gingerbread (that is to say, the GB Kernel) was 2.6.35. Why keep the froyo kernel number?
Click to expand...
Click to collapse
I think you can keep your kernel but you would really benefit from the new one when using Danik's ROM. I haven't tried his ROM though.
CM10 has a thing called "2nd-boot" which allows us to boot custom kernels, from an already running kernel.
2.6.32.9 is the Linux kernel version (which btw, the number doesn't have anyhing to do with the Android version, but newer Android versions work better with newer kernels, that's why there is a WIP 3.0.8 kernel for the Defy). "Jellybean" is just the branch of code. That kernel has the ramdisk and init binaries (I think, kernel experts please correct me) necessary to boot JB.
Motorola has never actually released a kernel newer than that for the MS2, the "official GB kernel" it's an older kernel "built" for GB.
Hope it helps.
Thanks for answering!

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