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[Q] Bluetooth disconnecting on i9505 running CM11 later than 2014-08-04

Hi!
I have been running CM for years now. For the first time the nightlies aren't working good for me. The cm-11-20140804-NIGHTLY is working great, but as soon as I installed any of the newer my bluetooth starts disconnecting. For instance, the cm-11-20140817-NIGHTLY caused the phone to restart several times a day. It also caused the bluetooth to disconnect and the wifi acted very strange.
The latest rom I tried was cm-11-20140831-NIGHTLY. The bluetooth disconnected almost immediately and I went back to 0804.
Any ideas?
Thanks in advance!
// Anders

str3der said:
Hi!
I have been running CM for years now. For the first time the nightlies aren't working good for me. The cm-11-20140804-NIGHTLY is working great, but as soon as I installed any of the newer my bluetooth starts disconnecting. For instance, the cm-11-20140817-NIGHTLY caused the phone to restart several times a day. It also caused the bluetooth to disconnect and the wifi acted very strange.
The latest rom I tried was cm-11-20140831-NIGHTLY. The bluetooth disconnected almost immediately and I went back to 0804.
Any ideas?
Thanks in advance!
// Anders
Click to expand...
Click to collapse
Hi,
I've made similar discoveries regarding only bluetooth connections. :crying:
I'm using nigthlies for a long time.
With cm-11-20140724-NIGHTLY-jflte S4 GT-I9505 and my car (BMW E61, 2006) connects perfectly. Later nightly roms aren't working with my car.
Any hints?

rainer777 said:
Hi,
I've made similar discoveries regarding only bluetooth connections. :crying:
I'm using nigthlies for a long time.
With cm-11-20140724-NIGHTLY-jflte S4 GT-I9505 and my car (BMW E61, 2006) connects perfectly. Later nightly roms aren't working with my car.
Any hints?
Click to expand...
Click to collapse
I have the same problem, but can't find cm-11-20140724-NIGHTLY-jflte, can you share it.
Tks

viincrt said:
I have the same problem, but can't find cm-11-20140724-NIGHTLY-jflte, can you share it.
Tks
Click to expand...
Click to collapse
You can use the latest Snapshot: cm-11-20140804-SNAPSHOT-M9-jflte.zip
In this one bluetooth is working correctly.
You can download at cyanogenmod.org
Regards,
Rainer

Same thing on SPH-L720
I noticed that the same thing happened with my Sprint Galaxy S4 (SPH-L720), on Cyanogenmod and Paranoid Android. I didn't even think to flash an older version of the ROM. Guess I'll do that since I miss having Bluetooth connectivity in my car.
Does anyone know why this started happening in recent builds, though? I haven't seen anything about it.

rainer777 said:
You can use the latest Snapshot: cm-11-20140804-SNAPSHOT-M9-jflte.zip
In this one bluetooth is working correctly.
You can download at cyanogenmod.org
Regards,
Rainer
Click to expand...
Click to collapse
Latest snapshot is cm-11-20141009-SNAPSHOT-M11-jflte and still has the problem. Connects but disconnects after a couple of minutes. Both in my car and my wife's car. Very annoying.

rainer777 said:
You can use the latest Snapshot: cm-11-20140804-SNAPSHOT-M9-jflte.zip
In this one bluetooth is working correctly.
You can download at cyanogenmod.org
Regards,
Rainer
Click to expand...
Click to collapse
hi
i have installed the dirty unicorn rom, and it works good, but the problem is the batery life, only one day.
now i have tested the cm-11-20140804-SNAPSHOT-M9-jflte.zip, and it works with problems, sometimes it dont disconect from the car and on the nest time it does not connect. normaly when it works, only can do on call the second only work after disable and enable the bluetooh.
tks

viincrt said:
hi
i have installed the dirty unicorn rom, and it works good, but the problem is the batery life, only one day.
now i have tested the cm-11-20140804-SNAPSHOT-M9-jflte.zip, and it works with problems, sometimes it dont disconect from the car and on the nest time it does not connect. normaly when it works, only can do on call the second only work after disable and enable the bluetooh.
tks
Click to expand...
Click to collapse
Has anyone tried the newest M12 snapshot to see if resolved their issue? I have the same issue on multiple M11 snapshots.

I have the last mahdi rom and use a bluetooth speaker for my bath. I don't have this problem. I don't know maybe they have another bluetooth driver or something

smurof1 said:
Has anyone tried the newest M12 snapshot to see if resolved their issue? I have the same issue on multiple M11 snapshots.
Click to expand...
Click to collapse
I just updated to the M12 Snapshot and managed to reconnected to my car about 15 times without any issues. I'll post back if I see other issues with this update.

CM11 M12 Bluetooth/WiFi Issue - Fix?
Apologies for the hijack, as this may not be entirely similar to the OP, but the solution could help.
I was experiencing wifi disconnects when I would toggle on bluetooth, when using CM11 M10 or higher.
With a clean install of Cm11 M12 (reset/new user + formatted /system), I finally worked up the courage (and kinda' understand what it is I have done) and updated the bootloader (not sure if necessary) and the GSM/LTE modems to the latest - XXUGNK4 - from here http://goo.gl/RziHz1
I was previously on XXUFNC6 (from the stock ROM), went to XXUGNI2 (closest to my country based on this thread http://goo.gl/TQi3gz) but that did not work either. So I went straight for the jugular, and installed first the bootloader, then the dual modem pack for XXUGNK4.
So far testing has yielded positive results.
Streaming audio (320mbps) via BT plus downloading some ISOs from MS (speed between 550KB/s to 1.01MB/s), and so far no issues.
Not saying this is going to work for anyone else, or solve the OP's exact issue, but it seems to for me.
-P

My Continued Bluetooth Nightmare

OK,
So I'm trying to get some help regarding this issue. I will continue to try different ROM's and what not to see if it can be resolved. I'm simply at a loss to where the issue lies though, however as of today, every custom ROM has been giving me trouble. My plan for today is to flash a stock ROM via Odin and then if that works go for Imperium, however I'm hoping with your help I may be able to solve it on something like CM12 or what not because I prefer the flexibility of a proper custom ROM.
OK, so the issue I have:
I have a car head unit which has bluetooth built-in. Music plays fine through Bluetooth, no jitters or issues. However, when I try and call someone and I'm listening to the radio or something non-Bluetooth, the phone does not send the signal (?) to the head unit to switch to Bluetooth. This means the call will be made via the dialer app and while the audio IS being routed through the bluetooth channel, the head unit does not know about it because it hasn't received the signal to switch to Bluetooth. I can switch it manually to Bluetooth and make and receive calls, but this isn't convenient at all and probably quite dangerous when I'm driving a car. The same applies when receiving a call.
Here's the thing, if I go into Bluetooth, select CAR KIT and go configuration, if I disable Media Audio, then it works fine! The phone correctly sends the signal to switch to Bluetooth and the head unit does so. The call goes through and it all works fine. This is repeatable.
Therefore, the issue I'm having lies in the fact both Media and Phone Audio are enabled at the same time. Has anyone else had this issue and does anyone have a suggestion to fix it?
Before someone suggests "just disable media audio". My answer is no, this isn't convenient at all. I use Bluetooth media quite a lot, and simply disabling and re-enabling it everytime simply isn't an option.
So far, I've had this issue on:
CM12.1 Optimized
CM12.1 Nightly
Mokee ROM
DirtyUnicorns
CM12 Nightly
I'm yet to try a stock Lollipop ROM. I know for a fact however, that stock KitKat DOES work.
I really could do with some help here, so any suggestions would be awesome.

all the roms you have tried are aosp....aosp is not designed for the s4 as its not an officially supported device (its not a nexus) so things like bluetooth and the camera will always be broken as the required stuff needed is proprietary to samsung
go back to stock and your problem will be solved

DSA said:
all the roms you have tried are aosp....aosp is not designed for the s4 as its not an officially supported device (its not a nexus) so things like bluetooth and the camera will always be broken as the required stuff needed is proprietary to samsung
go back to stock and your problem will be solved
Click to expand...
Click to collapse
The Bluetooth itself is fine. Audio quality is fine. Call quality is fine. It just seems like a tiny little thing that's causing all these issues for me, because if it could trigger my car head unit to switch, I wouldn't even dream of stock. Also the camera seems fine to be fair?
I'm not keen on going back to stock.... at all, so I'm thinking Imperium. It's a shame though because apart from this BT issue, CM12 is fantastic on this device. Takes a 2 year old phone and makes it feel like a brand new phone.
I really hope someone can fix that Bluetooth bug in CM12.1. I may even look myself, it must be something pretty small from a coding perspective because as I said, the functionality is clearly there as evidenced by the fact it works with Media audio turned off.
Regardless, thanks anyway

Changing the modem did not solve my problem.

When did you try the Optimized and the nightlies? There have been a lot of fixes lately regarding bluetooth.

Strange bluetooth problem after upgrading to 6.0

Hello,
Where my bluetooth previously worked on Android 5.0, ever since upgrading my i9505 to 6, Bluetooth does seem to connect, but calls still go though the speaker and I cannot change it to Bluetooth mode (my car, however, sees it). And when hanging up the phone, the phone will say "Hanging Up" yet still stay connected for what seems to be an indefinite amount of time - or until I restart the phone. Needless to say, callers on the other end cannot hear me. And, when playing music, the car's head unit does show that it's playing but again, music comes through the phone's speaker only.
Any advice? I've already tried flashing AOSP 6.0 and Kushan CM 13.0 and it's the same thing on both.
Thanks.

DJRepresent said:
Hello,
Where my bluetooth previously worked on Android 5.0, ever since upgrading my i9505 to 6, Bluetooth does seem to connect, but calls still go though the speaker and I cannot change it to Bluetooth mode (my car, however, sees it). And when hanging up the phone, the phone will say "Hanging Up" yet still stay connected for what seems to be an indefinite amount of time - or until I restart the phone. Needless to say, callers on the other end cannot hear me. And, when playing music, the car's head unit does show that it's playing but again, music comes through the phone's speaker only.
Any advice? I've already tried flashing AOSP 6.0 and Kushan CM 13.0 and it's the same thing on both.
Thanks.
Click to expand...
Click to collapse
Simple
6.0 Rom bugs.
Wait until they are fixed

They all are based on the same code. So if one roms has it they all have it.
Keep in mind that MM is brand new so you just have to be patient for it to be fixed.

DJRepresent said:
Hello,
Where my bluetooth previously worked on Android 5.0, ever since upgrading my i9505 to 6, Bluetooth does seem to connect
Thanks.
Click to expand...
Click to collapse
In a strange coincidence, I had all sorts of trouble on my i9505 with Bluetooth on 5 but is mostly resolved on 6 (CM 13 official).

mr.b00tl00p said:
In a strange coincidence, I had all sorts of trouble on my i9505 with Bluetooth on 5 but is mostly resolved on 6 (CM 13 official).
Click to expand...
Click to collapse
same here, but now i have new one's like connecting my mi band at all :/

I also had problems with BT with the CM13 Official Nightlies, and also with the Resurrection Remix.
But I now use the JDCTeam 6.0.1 ROM, and I don't have BT issues, I only use my BT in car, but I can send and receive phone calls, and also stream my music via BT.
Furthermore, almost everyone complains about the no sound with the calling issues.
I also had those issues back to the official CM13 and the RR 6.0.1 versions.
For me, this ROM is really good, you would maybe give it a try.
I use an old bootloader, the FNB8, but it seems to work pretty fine.

ROM that doesn't have Bluetooth audio problems?

I *REALLY* don't want to buy a different phone, but.... I recently swapped out the headunit in my truck from a Clarion to a Kenwood due to phone audio problems with the Clarion. So now the phone over BT with the Kenwood works great but the audio over BT is skipping and breaking up. Seen lots of posts about this being a problem, but no solutions. Sometimes rebooting the phone helps, but not usually. Sometimes forcing Bluetooth Share to close will help, but not usually. I've deleted and re-paired the devices.
I am currently running the stock 6.0 ROM, build 24.49-18, only rooted. The phone says it's up to date.
On to my point... do any of the alternate ROM's seem to have the BT audio issues worked out??

djmasters said:
I *REALLY* don't want to buy a different phone, but.... I recently swapped out the headunit in my truck from a Clarion to a Kenwood due to phone audio problems with the Clarion. So now the phone over BT with the Kenwood works great but the audio over BT is skipping and breaking up. Seen lots of posts about this being a problem, but no solutions. Sometimes rebooting the phone helps, but not usually. Sometimes forcing Bluetooth Share to close will help, but not usually. I've deleted and re-paired the devices.
I am currently running the stock 6.0 ROM, build 24.49-18, only rooted. The phone says it's up to date.
On to my point... do any of the alternate ROM's seem to have the BT audio issues worked out??
Click to expand...
Click to collapse
Answering my own question.....
I ended up trying another ROM, AICP for clark, and so far AVRCP is working fine, it has connected/disconnected several times and has always come back quickly and without any skipping/stuttering. I haven't tried the phone over BT yet. And it's a pretty good ROM beyond that!!!

djmasters said:
Answering my own question.....
I ended up trying another ROM, AICP for clark, and so far AVRCP is working fine, it has connected/disconnected several times and has always come back quickly and without any skipping/stuttering. I haven't tried the phone over BT yet. And it's a pretty good ROM beyond that!!!
Click to expand...
Click to collapse
I was wrong, after a couple of days AICP started doing the same thing. Replaced XT1575 with an HTC 10, I wish the screen was larger but it's a really nice phone!!! And no Bluetooth troubles.

My phone is connected to my car radio any time I'm in the car, and not having this issue. I'm still on 5.1.1 stock but rooted. Headunit is a Alpine CDE-W235BT. I've had it hooked up 5+ hours at a time. No issues with media or phone calls.

Yeah, it works for some but not for others... I think it's more headunit dependent... my Clarion was OK for music but the phone was jacked up. Reverse with my Kenwood, phone OK but audio jacked. Either way, it had to go.....

Factory rom is the only one I can get to work properly with BT in my Mercedes

I haven't tried it on the Moto X Pure, but on the 2nd gen Moto X, Cyanogenmod had infinitely better bluetooth strength than the stock rom, or any other rom I tried. I'm not saying it's the same for the Pure, because they're probably maintained by different people, but worth looking into at least.

Bluetooth usually connects between my Moto X Pure and Mazda3, but there is a 35% chance that when I turn on my car the audio will connect in this really strange manner where tracks skip and the audio sounds horrific. The only solution is to disconnect and reconnect again, which takes another 30 seconds.
Every ROM I have tried on Moto X Pure has had this problem:
Stock, CM13, AICP
It's gotten so annoying that I've decided I am going to sell my Moto X Pure and revert to my Galaxy S4. Never have ANY problems with my old Galaxy.

Bluetooth issue i9505

Dear forum,
really looking for some help with the bluetooth connection and/or some pointers into the right direction.
Before anyone asks, yes I have searched the forum(s) and googled days in a row, tried several builds and found a lot of bluetooth questions/issues but not this specific issue nor a solution.
Have a S4 i9505 which has a perfect bluetooth connection with my Renault Carminat system using the stock rom. As I had other issues with the stock rom, I rooted and upgraded the phone to Optimized LineageOS 14.1 (7.1.2). When pairing the phone to the car, it all works fine (it doesn't disconnect - which is a commonly reported issue). media streaming works fine, the car audio system also responds to the phone (and vice versa), contacts are imported etc. The big issue is however that there is no sound (nor receiving nor sending) when a call is received and/or intitiated.
In my quest to resolve this issue I let the dealer upgrade the firmware of the car audio system, tried with at least two different (but similar) S4 i9505 phones on custom roms, tried several other custom builds (from CM12 to CM14), tried an older but also the latest modem/BL for my region (XXSPQA1), tried some nightly builds but in all cases the exact same issue remains. Only when I go back to the stock rom, I have again a perfect bluetooth connection. A S5 (with stock Android 6) can connect to my system without issues as well.
So my thoughts are that the issue lies within custom roms as even a custom rom based on the same Android version as stock rom doesn't work properly.
Any thoughts what I can do more? Is it possible to copy the BT files from the stock rom and copy it to the custom rom? Any ideas? If it can help to post certain logs I will absolutely do so. Phone is on stock rom again now.
Thank you for your support!

I have exactly the same issue on my I9505, every time i connect to bluetooth (previous car, new car bluetooth speaker calling seems to work , but ther is no sound (only the end of call beep. and also, after disabling bluetooth, the sound is still not working ... i have to reboot my mobile to be able to call again. i hope this issue can be resolved
( when connecting to a bluetooth device for playing media blutooth works )

Same here. I hear a distortion sound when a call is made though. Worked fine with 5.X and broken in 8.0 and 8.1. I tried various modems as well. I even changed codecs in the developer options and didn't find one that worked. i9505