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
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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

goi g from 4.1.2 to 4.4.4 aosp Rom

So I took a long break from flashing my phone. I just want to get a newer stock android Rom on the phone. Not touchwiz Rom. Do I just download and flash the Rom? Up to date bootloader just for touchwiz based Rom correct?
All I know is I have 4.1.2 now. I317m. It's rooted of course and some kind of custom Rom. It's been a loong time

If you go on Cyanogenmod's website they have a installer that is really easy

I don't have a computer access right now. Or very often at all.
Also if I go to a kitkat touchwiz Rom I just have to flash the proper kernel for wifi to work? Is this consistent across all Roms I'd be looking to flash?

s384 said:
I don't have a computer access right now. Or very often at all.
Also if I go to a kitkat touchwiz Rom I just have to flash the proper kernel for wifi to work? Is this consistent across all Roms I'd be looking to flash?
Click to expand...
Click to collapse
Sometimes you have to flash a kernel to get wifi to work but I use agni kernel he makes one for tw and cm roms they are awesome

[Q] TMO S3 ROMs with WiFI Calling?

So I have searched around and so far I have been unable to find a custom ROM that mentions support for TMO's WiFi calling. Are there any such ROMs or am I just SoL?
If there are not any that support it, any suggestions for the best running S3 ROM? I am about to deploy (hence the desire for WiFi calling) and I am still running on an old 4.1.2 Hyperdrive ROM. I'd like to update my ROM to a KitKat based one before I go, but I don't have a lot of time to tinker with it on the offhand chance that it does not install clean. So I am looking for something solid. If the kernel needs to be updated to run a particular ROM, please note that in your replies so that I can find the right one if needed.
S3 Model# SGH-T999 (non LTE)
Baseband Ver. T999UVUEMJ4
Kernel: 3.0.31 - 370274 (I remember this is a custom kernel, but I don't remember who made it, just that it is from 2012)
Build# JZO54K.T999VRBMB1

Lazarus416 said:
So I have searched around and so far I have been unable to find a custom ROM that mentions support for TMO's WiFi calling. Are there any such ROMs or am I just SoL?
If there are not any that support it, any suggestions for the best running S3 ROM? I am about to deploy (hence the desire for WiFi calling) and I am still running on an old 4.1.2 Hyperdrive ROM. I'd like to update my ROM to a KitKat based one before I go, but I don't have a lot of time to tinker with it on the offhand chance that it does not install clean. So I am looking for something solid. If the kernel needs to be updated to run a particular ROM, please note that in your replies so that I can find the right one if needed.
S3 Model# SGH-T999 (non LTE)
Baseband Ver. T999UVUEMJ4
Kernel: 3.0.31 - 370274 (I remember this is a custom kernel, but I don't remember who made it, just that it is from 2012)
Build# JZO54K.T999VRBMB1
Click to expand...
Click to collapse
enewman17 has a rom based on Tmobile code. Its called S3Rx 3.0, and it does have WIFI calling... Works quite well.. Its
http://forum.xda-developers.com/showthread.php?t=2326763

Only ROMs built from stock T-Mobile firmware will have WiFi calling. S3Rx 3.0 is a good choice.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

DocHoliday77 said:
Only ROMs built from stock T-Mobile firmware will have WiFi calling. S3Rx 3.0 is a good choice.
Sent from my SAMSUNG-SGH-T999 using Tapatalk
Click to expand...
Click to collapse
Appreciate the info guys.

[Q] Bootloader question :)

I recently updated my N7105 to the recent 4.4.2 Nordic ROM ( n7105xxufnd3 )that was floating round that tripped my Knox, which I dont care about.
When i got sick of the updates abysmal battery life i flashed the latest stable release of CM for the GNII LTE a 4.3 based ROM with out issues.
But I'd like to know if i can revert back to my original ROM i.e. WanamLite MC3 V1.3, a TW 4.1.2 based ROM, for its spen support, battery life, atpx and boeffla sound support (im a big music listener) w/ Wanam's Adam Kernel.
Can i do this with out running into any issues, despite the gap between a 4.4.2 boot-loader (as I've been told i cant roll-back from this version) to a TW 4.1.2 ROM?
Thanks in advance guys

greyhamism said:
Can i do this with out running into any issues?
Click to expand...
Click to collapse
Based from what I remember, devs say that when you are with KK BL (ND3), you cannot flash a stock rom lower than it and the lowest custom rom that you can flash is 4.3.

Is there anyway i can flash an older bootloader? and/or is there a similar ROM to Wanam's that uses 4.3 as its base?
As awesome as CM is, there are touchwiz features specific to the note series that are hard to implement on CM/ASOP based ROMS :/

greyhamism said:
Is there anyway i can flash an older bootloader? and/or is there a similar ROM to Wanam's that uses 4.3 as its base?
Click to expand...
Click to collapse
Do not try to install anything lower as it will break device. I'm sorry, I know nothing about wanam lite.

I have a unrooted note 2, manually installed 4.4.2 as 4.3 had major battery issues.
Things got worse for me in 4.4.2 nordic countries and I went and downloaded the offical roms from sammobile and am now back on 4.1.1 offical.
It can be done.
Sent from my SM-T310 using XDA Free mobile app

hotkolbas said:
It can be done.
Click to expand...
Click to collapse
Wow, I thought once you are in a higher bootloader, you cannot install a lower one. No problems at all?
I'm sorry if I gave out wrong info, that was how I knew it was.

I have no issues at all.
Apart from missing out on features from 4.1.2 and above everything works as if I didnt update the device at all.
I would not do a restore from higher up android versions but if you start feom scratch its all good.
And I can say my zero lemon battery is working at it should be, I now have days worth of battery life.

I'm getting invalid kernel/ ramdisk size error on bootloader screen. This is the first time I got this error while entering recovery screen. I'm don't know much about this. Please help.
I have rooted Moto X (2013) running LiquidSmooth v 3.2
Sent from my Moto X using XDA Free mobile app

Sorry champ but this threqd is for a galaxy note 2 specifically a gt7105 and has installed a samsung stock rom, I have done this and have gone back to 4.1.1 but seeing as you have a rooted romed moto x it is out of my league.
I dare say this process is incompatible with the moto x and seeing as you can get into recovery or cwm or what ever its called you can still flash a rom with the relavent bootloader that was previous to your dilemma
Sent from my SM-T310 using XDA Free mobile app

Kit Kat Touchwiz ROM ?

Hello,
Is there any kit kat touchwiz ROM available which is somewhat stable? I would like to be able to use tap n pay. I have a Verizon NOte 2 with such a ROM and it works great. I am upset that it is so hard to find a ROM for the tmobile phone.
I guess Tmobile never released kitkat for this phone?

Lol .. :sly:

Use S.W.A.R.M (Stock) or Test Rom 1.2 (it has some S5 apps - does not have wifi calling) follow all instructions for installing.
Sorry SWARM isnt KitKat. Rom of Thrones is - which is the base for my Test Rom 1.2 - Good Luck.

Double0EK said:
Use S.W.A.R.M (Stock) or Test Rom 1.2 (it has some S5 apps - does not have wifi calling) follow all instructions for installing.
Sorry SWARM isnt KitKat. Rom of Thrones is - which is the base for my Test Rom 1.2 - Good Luck.
Click to expand...
Click to collapse
Thanks,
I did try test ROm and my wifi wasn't working. I now know that its because I needed to update my baseband .. Which I have now done. SO ill give one of those a try.
I also understand that we can load AT&T roms on this phone as long as we are using the T889 Radio,,, so I am looking at those roms as well

ilmar72 said:
Thanks,
I did try test ROm and my wifi wasn't working. I now know that its because I needed to update my baseband .. Which I have now done. SO ill give one of those a try.
I also understand that we can load AT&T roms on this phone as long as we are using the T889 Radio,,, so I am looking at those roms as well
Click to expand...
Click to collapse
Yes. You can also try AGNi Kernel if Wifi still isnt working. From my experience 4.3.0 is the best so far.

Double0EK said:
Yes. You can also try AGNi Kernel if Wifi still isnt working. From my experience 4.3.0 is the best so far.
Click to expand...
Click to collapse
I had to flash the wifi fix. Im not sure if flashing a kernel would have fixed my wifi problem. As I understand; the issue is that my phone has the original bootloader that it was shipped with. it doesnt have the 4.3 OTA bootloader therfore I had to install this wifi fix.
SO now I have a Tmobile T889 running an ATT touchwiz rom... I have working LTE(LTE worked with Tmobile roms too). To get the LTE to work I had t flash the latest tmobile radio. My Google wallet tap n pay works again. I am extremely happy about this setup!
Oh... and I am using AT&T go as the service... not Tmobile

ilmar72 said:
I had to flash the wifi fix. Im not sure if flashing a kernel would have fixed my wifi problem. As I understand; the issue is that my phone has the original bootloader that it was shipped with. it doesnt have the 4.3 OTA bootloader therfore I had to install this wifi fix.
SO now I have a Tmobile T889 running an ATT touchwiz rom... I have working LTE(LTE worked with Tmobile roms too). To get the LTE to work I had t flash the latest tmobile radio. My Google wallet tap n pay works again. I am extremely happy about this setup!
Oh... and I am using AT&T go as the service... not Tmobile
Click to expand...
Click to collapse
Yes flashing a kernel would have fixed the wifi. Flashing the patch wouldve probably made things worse to be honest..now the only way to revert the patch is to odin back to the original firmware...
Im on 4.1.2 Bootloader myself. Havent upgraded to anything above that..i only flash kernels and the modems. Works fine for me. Only issue is the charging while phone is off doesnt work.
Which Rom did you use?