Develop Bugs

Kernels and WiFi

Why do some kernels kill WiFi when flashed. Or is it just a mobile Odin thing
I have also tried to replace the kernel and rezip same issue
Sent from my SPH-L710 using xda app-developers app

Kernels control the hardware functionality. They specify higher-level functions so that the software (Android OS) can properly interact with the hardware. The kernel is what contains the drivers and such that you need for your different radios to work (mobile network [LTE or 3G] and wifi), as well as things like power management and proper boot/shutdown sequences. If its not implemented in the kernel, theres no way any programs can access the higher level functions to get the wifi going, or to get 4G going.
This is also why it's difficult for some devices to get working 4G on android versions past what is officially supported because the 4G drivers have to be written from scratch into the kernel, and they change from version to version. Now its not impossible, but very difficult
Hope that answers your question :thumbup:

CNexus said:
This is also why it's difficult for some devices to get working 4G on android versions past what is officially supported because the 4G drivers have to be written from scratch into the kernel, and they change from version to version. Now its not impossible, but very difficult
Click to expand...
Click to collapse
Knowing this, does that mean TW kernels are better for writing things like 4G? I don't know how to explain my question, I guess I'm asking if TW kernels are more 'compatible' since they're just stock modifications.

OK the reason I'm asking is because of my port of pure aosp the stock CM kernel will not do WiFi but any other kernel will Lean BMS KT
Why work with one ROM but not another.
Sent from my SPH-L710 using xda app-developers app

sevenpioverthree said:
Knowing this, does that mean TW kernels are better for writing things like 4G? I don't know how to explain my question, I guess I'm asking if TW kernels are more 'compatible' since they're just stock modifications.
Click to expand...
Click to collapse
No, what I mean is that once its officially released (for this phone it would be Touchwiz), then that can be incorporated into aosp kernels made for that official version for a specific phone. Both (theoretically) run it just as well, theres no compatibility issues in favor or either. But of course, since TW kernels have been engineered for this phone while AOSP has not, AOSP kernels would require a little more hacking to get it to work, hence possibly degrading the quality of 4G or other radios
bthorne79 said:
OK the reason I'm asking is because of my port of pure aosp the stock CM kernel will not do WiFi but any other kernel will Lean BMS KT
Why work with one ROM but not another.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
My guess would be that the paths for different things arent what its expecting, you would have to split the boot.img and diff the files to find out for sure though

Nice, thanks CNexus, you da man

Wifi broken
So, on a Sprint Galaxy S3, after rooting first with the unified toolkit and finding that my wifi no longer works, I went back to the stock version and found I still had no wifi. Figuring that it's better to be rooted so I can tweak things, I rerooted using QBKing's method (much easier, by the way). Wifi is still broken. Is there not a fix for this yet?
I've got:
Model#
SPH-L710
Android Version:
4.1.1
Baseband Version:
L710VPBLJ7
Kernel version:
3.0.31-CL616748
[email protected] #1
SMP PREEMPT Sat Dec 1 23:25:55 KST 2012
Build#:
JRO03L.L710VPBLJ7
Hardware Version:
L710.14
Because I'm a quiet one, I'm not allowed to comment in the forum that originally started this and I don't have 10 posts yet. So, here I am - sort of on topic and sort of off topic. But the bottom line is, I need to fix wifi since I'm *always* in roaming and connect to the world through my wifi.
So.
Ideas?? Please.
Thanks!
~Jayme

jaymethunt said:
So.
Ideas?? Please.
Thanks!
~Jayme
Click to expand...
Click to collapse
When you rooted, did you install a custom recovery (CWM or TWRP)? Turn off your phone and boot into recovery and see if it's either of those.
You're currently on an out-of-date system. I don't think that's why you don't have Wifi, but I thik it'd be best if you try the latest and greatest.
If you do have a custom recovery, you can flash the stock rooted rom by Freeza. If you don't have a custom recovery, you'd have to re-root and make sure to follow the instructions (including pulling the battery).
If you need help with how to flash a Rom in a custom Recovery, I wrote this up for a thread earlier.
Hope you get your wifi working.

I guess I'm not sure how to answer your questions. I do have ClockWorkMod (that is what CWM means, right?) on right now, yes.
That page you recommended is over-the-top. There's so many choices, I don't know which one to make! I think I want Odex, just because I'm not a developer at this stage. Because I'm starting out with CWM, do I want this one or that one?
MD5: A89894F653099D158C8C459F2B7F656E
MD5: 5C24F1174C40E9B878C7D9BEA75DBFAF
Or am I just completely off target?
Thanks for replying and I hope my wifi gets fixed, too.

jaymethunt said:
I guess I'm not sure how to answer your questions. I do have ClockWorkMod (that is what CWM means, right?) on right now, yes.
That page you recommended is over-the-top. There's so many choices, I don't know which one to make! I think I want Odex, just because I'm not a developer at this stage. Because I'm starting out with CWM, do I want this one or that one?
MD5: A89894F653099D158C8C459F2B7F656E
MD5: 5C24F1174C40E9B878C7D9BEA75DBFAF
Or am I just completely off target?
Thanks for replying and I hope my wifi gets fixed, too.
Click to expand...
Click to collapse
Yes, CWM is ClockWorkMod.
I'd recommend DeOdex Rom, because if it doesn't work, you can still flash mods onto it that might help you out (without reflashing a whole new Rom). If you install the Odex version, you wouldn't be able to flash most mods out there.
I haven't messed around with the "Leaked" build, so I'd personally recommend the latest official, which is the MB1. The link you should be looking for is:
DeOdex:
Sprint Touchwiz Jelly Bean 4.1.2 L710VPBMB1 | Mirror | Mirror 2 (Not yet active)
MD5: 37E1CCCB3A30959C64DF238D0BD2B23C
If you download this file and install it per my previous instructions (that I linked to, make sure to do a Nandroid Backup and to wipe the /system in CWM), Wi-Fi should be working. If it doesn't I might have another thing I'd want you to try, but I'm fairly certain this will do the trick.

THAT worked beautifully. I guess I just needed jellybean. lol. So, I'm rooted, on the latest and greatest, AND I have Wifi! Yae!
Thanks so much for your help!
~Jayme

[Q] What Firmware do I have to install

Hey guys,
I bought a rooted Galaxy S3. On the back of the phone I can read the following: SGH-I747 16GB
Afterwards I checked the information of the current firmware: Model: SGH-T999, Base Band Version: I747UCLH9 (Android Version 4.1.1)
Now I would like to update the firmware to Android 4.3 (ideally a german firmware).
But now I'm not sure, what firmware I have to use. I'm afraid, I'll crack the phone, if I install the wrong firmware.
Thanks a lot for your help :cyclops:

Please edit your post and delete the S/N number. Never disclose this or your IMEI.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

If I were you, I would not update to a stock 4.3 ROM because the 4.3 ROM will include Knox. I also recommend backing up your imei and nv folder before flashing ROMs.
Is your phone unlocked? If not, you can try using the free unlock method to permanently unlock it.

Thanks for your good tip. Unfortunatelly it's the phone of my girlfriend.
That's why I would like not too much changes in design and functionality of the phone.
I'll surely backup the device before changing anything. The phone is already unlocked.

Is it possible, to install the rom I9300XXUGML2 on this phone?

No any I9300 roms could hard brick.

Thanks a lot. So I think, I would have to use the I747UCUEMJB for the phone.
If I install the stock rom, can I change the default language (incl. keyboard) to german (I'm afraid that it's not working because of Knox)?
And if it's not possible to change the default language, which firmware would you recommend, which looks exactly or nearly the same as the Original one?

The back of the phone indicates that it is an AT&T s3 (i747) but the firmware says it's a T-Mobile s3 (T-999).
Looks like there is a mismatch on the firmware.

That's the problem I have. I'm unsure which firmware I should take.
The guy I bought the phone from told me that he bought it in China. And I think he already bought it as a rooted phone.
We bought the phone and everything works fine 'til today. I know, never change a running system. But an update with all the new functions and bug fixes would be really great. And because it's my girlfriend's phone I don't like to change the firmware to one which looks differently than the actual one...

If it were me, I would just flash the stock AT&T.

midst trmicri
Ok, so I'll install the firmware I747UCUEMJB
If so, will the phone still be rooted? I have to change the language to german after installation. And like I know it shouldn't be possible, if the phone isn't rooted anymore...

visio999 said:
Ok, so I'll install the firmware I747UCUEMJB
If so, will the phone still be rooted? I have to change the language to german after installation. And like I know it shouldn't be possible, if the phone isn't rooted anymore...
Click to expand...
Click to collapse
You can't just flash a stock AT&T 4.3 ROM in Odin because there is no such file. You would have to flash a completely stock AT&T ROM and then update to 4.3. I'm not sure that AT&T ROMs have German as one of the languages.

Well, technically it would still be rooted (at least that happened to me), but also dunno if it has German language
Sent from my SGH-I747M using Tapatalk

Thanks a lot. So the easiest possibility would be not to flash the stock at&t rom and update the rom, which is already on the phone.

Your phone is an sgh-i747 which is an AT&T s3 but the operating system is a T-999. If this is right, there is definitely a mismatch between the phone and operating system.
If you want the 4.3 ROM on your phone, install a custom recovery and flash firmware that's made for the d2att.
I googled I747UCLH9 and I found this: http://androidromupdate.com/tag/i747uclh9/
Where do you see T-999 in your phone?

On preferences - Information of device (sorry, I don't exactly know how it's in english):
Model number: SGH-T999
Android-Version: 4.1.1
Base band version: I747UCLH9
Built Number: http://bbs.romup.com

visio999 said:
On preferences - Information of device (sorry, I don't exactly know how it's in english):
Model number: SGH-T999
Android-Version: 4.1.1
Base band version: I747UCLH9
Built Number: http://bbs.romup.com
Click to expand...
Click to collapse
Boot your phone into recovery mode. Do you have a custom recovery installed?

[Q] SGH T999 and Roms.

I had recently obtained a s3 its a T-mobile, its running 4.1.2, with the T999UVDMD5 baseband. I rooted it, flashed xposed(haha the only thing XD). Well, reading about/friends have said there was trouble with the 4.3 update so I decided to stay on 4.1.2.
However, now I've decided to flash a custom rom, and I have noticed the different labels(D2lte, D2tmo, D2usa) and I had read from http://forum.xda-developers.com/showthread.php?t=1736477 "As of right now, the roms for your S3 are not meant to be used on other S3 variants" .
I have a few questions:
1.There was a baseband update, should I update it? If so, how exactly?
2.Would it be wise to flash a D2lte on This T-mobile device? I was looking at Resurrectionhttp://forum.xda-developers.com/showthread.php?t=2692481(originally waiting on cm11 but.. Yeah lol)
3.Looking at KitKat rooms, which ones could I flash?
4.Would it be safe, if I did flash a 4.4.2 to restore a nandroid backup of my fresh rooted stock 4.1.2.
5.Lastly, what kernel would you say use?(Sorry to ask, curiosity as to which i could flash)
I appreciate taking your time to answer my questions and have a good day!

1) custom recovery.. There are zips available to flash
2) d2lte covers all d2 devices so its safe
3)Any on the development threads
4) Yes
5) like on 3, you can flash any kernel in the development threads, experiment and see which one works the best for you!
Sent from my SGH-M919 using Tapatalk

Thank you! Time to get to work!

Ravenjolly said:
I had recently obtained a s3 its a T-mobile, its running 4.1.2, with the T999UVDMD5 baseband. I rooted it, flashed xposed(haha the only thing XD). Well, reading about/friends have said there was trouble with the 4.3 update so I decided to stay on 4.1.2.
However, now I've decided to flash a custom rom, and I have noticed the different labels(D2lte, D2tmo, D2usa) and I had read from http://forum.xda-developers.com/showthread.php?t=1736477 "As of right now, the roms for your S3 are not meant to be used on other S3 variants" .
I have a few questions:
1.There was a baseband update, should I update it? If so, how exactly?
2.Would it be wise to flash a D2lte on This T-mobile device? I was looking at Resurrectionhttp://forum.xda-developers.com/showthread.php?t=2692481(originally waiting on cm11 but.. Yeah lol)
3.Looking at KitKat rooms, which ones could I flash?
4.Would it be safe, if I did flash a 4.4.2 to restore a nandroid backup of my fresh rooted stock 4.1.2.
5.Lastly, what kernel would you say use?(Sorry to ask, curiosity as to which i could flash)
I appreciate taking your time to answer my questions and have a good day!
Click to expand...
Click to collapse
To answer your questions:
1. You do not need to update your firmware - I'm still on MD5. Modems, however, can be flashed separately from firmware.
2. You can flash d2lte ROMs on this phone as it's all one unified build for US SGS3 variants. (I.e. T-Mobile/AT&T/Sprint/Verizon SGS3 is now all built under d2lte).
3. As far as which KK ROM to flash...just try them all out and see which ones you like the best. Each ROM has different features - see which one is right for you.
4. If you don't update your firmware, then yes. (FYI, flashing a custom KK ROM does not update your firmware. However, if you flash one of the 4.3 root66 files that has firmware included, then it will update your firmware).
5. Again, try it out. It's hard to say which ROM/kernel combination will work best. I suggest you read the forums to see what people think of them.
Hope that helps.

Ravenjolly said:
Thank you! Time to get to work!
Click to expand...
Click to collapse
No problem, and i forgot to say but the only time you might need to update modem is if you flash a 4.3 touchwiz ROM, other than that its not really needed unless you want to experiment and see if one gives you better results
Sent from my SGH-M919 using Tapatalk

Oh, and one more thing: DO NOT flash a ROM that is for the international version of the SGS3 (i9300). It will, most definitely, brick your phone.
Don't know if you knew that or not...just wanted to make sure.

[Q] still on 4.2.2 t mobile

Okay so I have a question I am hoping someone can help me with. I am on t mobile, I have an S4. Currently I am rooted and I have android 4.2.2 Alpha 11.0 Bioshock kernal 3.0. I installed it when it first came out and since then I have been MIA at work. I want to install "the Sickness" on my phone. But I wasn't sure if the procedure was the same as usual. I saw something about "safestrap" and I just wanted to make sure I can load the rom as I would normally. Thanks for any assistance, I did look around before I posted this but could find anything about tmobile. I probably miss somethings.

No safestrap, you can flash it normally but you'll also need to update your modem to NB4

Update the modem first?

ENOEKIM said:
Update the modem first?
Click to expand...
Click to collapse
No after
~Sent From My Insane S4~

AT&T OTA update problem with 4.4.2

I have an AT&T Samsung Galaxy Note 2 1317.
Android version: 4.4.2
Build: KOT49H.1317UCUNE5
Kernel: 3.0.31-1728680
[email protected] SWDD6020 #1
AT&T recently did an OTA update to version 4.4.2.
I was running 4.1.1
I do have that same kitkat version on my Nexus 7 and it works wonderful, unfortunately when it updated my phone it created several problems.
My sound is not work properly goes on and off.
Phone calls are broken up people hear me but I can't hear them because of breaking up.
My battery is no longer holding a charge for long and the phone get very hot.
Phone randomly goes black and I have to remove the battery to get it going again.
I would like to get it working.
I do have Marks (skipsoft.net) toolkit but there is no 4.4.2 version.
Not sure what to do any help would sure be appreicated.
Donna aka gramme

Why not just flash a custom rom like an stock touchwiz rom

Sound problem reply
terpin32 said:
Why not just flash a custom rom like an stock touchwiz rom
Click to expand...
Click to collapse
Is there a rom for 4.4.2? where do I get it?
Thanks for your help
gramme aka Donna

gramme66 said:
Is there a rom for 4.4.2? where do I get it?
Thanks for your help
gramme aka Donna
Click to expand...
Click to collapse
Heres the rom I'm running right now
https://www.androidfilehost.com/?fid=23501681358557170