topic Re: Possible fix for bluetooth disconnection problems in XPERIA archive

Possible fix for bluetooth disconnection problems

sfortis — Fri, 11 Dec 2015 17:08:37 GMT

i've encounter frequent disconnections with Z5 and my card BT system (ford).

So i've captured a btsnoop file until first disconnection. The problem is that Z5 is trying to send the VCARD of the phone owner ( settings --> users --> you) with encoded photo:

 [WI›ï§ƒSË!telecom/pb.vcfBx-bt/phonebookLÿÿ…'â9Ágš? ÿ@™ïôôËHìBEGIN:VCARD
VERSION:2.1
N:;Sakis;;;
FN:Sakis
TEL;CELL:693-*********
PHOTO;ENCODING=BASE64;JPEG:/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAMCAgMCAgMDAwM
EAwMEBQgFBQQEBQoHBwYIDAoMDAsKCwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/
2wBDAQMEBAUEBQýâ9ÁgÁ|â9ÁgÎ I›ÿ;â9ÁgÑZ ÿ@™ïôkFBQkUDQsNFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUF
BQUFBQUFBQUFBQUFBT/wAARCABgAGADASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAA
ECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaE
II0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSoýâ9Ágöâ9ÁhqË I›ÿ;â9Ái·K
.
.
.
.

The picture size is very big for the receiver (in my case ,ford BT car audio) and is crashing the BT stack.

workarounds:

1. remove the picture
2. crop the picture and reduce the size.

i've made a 5minute call today with no disconnections at all.

I dont know if this is a sony software bug of ford BT bug, but it seems that many devices are suffering BT disconnections, so

guys please check this.

Re: Possible fix for bluetooth disconnection problems

Mike8580 — Mon, 14 Dec 2015 03:13:28 GMT

Hi I have just made the switch from Samsung to xperia z5 premium about 4 weeks ago now, never did I have a problem with the Bluetooth connection in my car when using my galaxy s5, my Xperia z5p wont stay connected, it just automatically disconnects and reconnects, im hoping its just a software failure on sonys side.

Re: Possible fix for bluetooth disconnection problems

Mohammad_Sayed — Mon, 14 Dec 2015 06:20:29 GMT

My Z5P has the same problem. Every time I pair it with the car, it disconnects by itself after minutes. I'm having a lot of problems with this phone.

Re: Possible fix for bluetooth disconnection problems

sfortis — Mon, 14 Dec 2015 07:05:19 GMT

have you tried removing the owner picture?

Re: Possible fix for bluetooth disconnection problems

Mohammad_Sayed — Mon, 14 Dec 2015 07:19:04 GMT

@sfortis

I didn't assign a picture for the owner at all.

Re: Possible fix for bluetooth disconnection problems

herasymcuk — Mon, 14 Dec 2015 11:18:34 GMT

i have many many problems with the z5p bluetooth: with my audi bt car....with smartband talk.....with iblazr2 led flash....

Re: Possible fix for bluetooth disconnection problems

funnybunnyhaha — Sat, 26 Dec 2015 22:30:50 GMT

This is a fundamental Bluetooth stack issue known in all AOSP based roms. Just the Bluetooth stack/engine is screwed. For example Samsung changing it with a custom fixes to be more stable, while on nexus phones it is like on xperia devices - much more unstable. Just Wait few more years until both receiving devices and submitting fix the mess. I can confirm the same - random disconnets with my Subaru y2012.. Depending what area ur driving in (taxi's radiations etc..)

Re: Possible fix for bluetooth disconnection problems

MikelWard — Wed, 30 Dec 2015 05:39:46 GMT

@funny, what do you base that on?

My Nexus 5X and Xperia Z3 Compact don't have any Bluetooth problems, only my Z5 Compact.

Re: Possible fix for bluetooth disconnection problems

Freegle — Wed, 30 Dec 2015 10:17:40 GMT

I have two devices:

1. Xperia Z5 recently purchased (I've had two of these now with the latest being 3 months old)

2. Xperia Z

Both are running the same version of Android

I also have 4 Bluetooth devices that I connect to regularly

1. The car

2. Bluetooth headset

3. Bluetooth speaker

4. LG G watch

With the Xperia Z Connectivity to these devices is very smooth a flawless!!! A dream even! I loved this phone and wanted to stick with Sony

With the Xperia Z5 however, connecting to bluetooth devices is problematic. Sometimes it does not connect to them and sometimes its connected but audio still comes out from the phone. With my LG watch, somtimes I can't reply to messages or use 'ok Google' as it can't send the data back to my phone. To overcome these problems I have to switch the bluetooth on and off OR reboot the phone.

It must be software related as I had my first Z5 swapped and I still have these problems.

@fortis I shall delete my picture and see how things go. Thanks for sharing!!!

Re: Possible fix for bluetooth disconnection problems

funnybunnyhaha — Wed, 30 Dec 2015 19:54:14 GMT

My nexus4 and nexus5 (both stock), suffering both from these "more often" disconnets (even nexus 4 on 4.3 was a nightmare - you can't switch bt on if disconnets). Then on note 4 with tw, con was pretty solid until I moved to cm12.1 and then on cm13. I can compare all expect the tuchwiz rom (including z5p) as much more unstable. Also I found this about the screwed Bluetooth stack somewhere in the net 6-7 months ago, but I can't remember the source.

Re: Possible fix for bluetooth disconnection problems

funnybunnyhaha — Wed, 30 Dec 2015 20:52:05 GMT

@Freeegle

Mine is connecting OK, but just disconnecting/reconnecing much more often (to the car).

Re: Possible fix for bluetooth disconnection problems

sfortis — Thu, 31 Dec 2015 10:53:13 GMT

After removing the owner photo ,my bt is working just fine with all my devices!

- mw600 sony bt
- Logitech x100 bt speaker
- iwave bt a2dp receiver
- Ford car audio

Very happy so far with Z5!

Re: Possible fix for bluetooth disconnection problems

herasymcuk — Thu, 31 Dec 2015 11:51:50 GMT

from where?

Re: Possible fix for bluetooth disconnection problems

sfortis — Thu, 31 Dec 2015 13:17:12 GMT

@herasymcuk wrote:
from where?

Check the first post on this thread

Re: Possible fix for bluetooth disconnection problems

herasymcuk — Thu, 31 Dec 2015 17:41:49 GMT

it's seems to work for me too!!!

Re: Possible fix for bluetooth disconnection problems

sfortis — Wed, 23 Mar 2016 05:49:13 GMT

Unfortunatelly, the above "workaround" is not working anymore with android 6.0.

The Z5 bluetooth with my ford car audio is disconnecting every 1-2 minutes of operation. Bluetooth is not only fixed but is even worse with 6.0 update as now audio is constantly stuttering on every audio A2DP device...

very dissapointed and thinking of my flawless Nexus 5. I was very happy with TabletZ , Tablet Z3 compact so far, but with my first ever sony phone, Xperia Z5 had an unplesant surprise...