Develop Bugs

[BUG] Bluetooth music audio stuttering/skipping after Nougat upgrade on Lenovo P2A42

Hi,
This is a very annoying thing I am facing as I am an avid music listener and I love to listen to music in my wire free bluetooth headphone.
Everything was working fine until I upgraded to the official Nougat version from Marshmallow in my Lenovo p2 32GB/4GB.
The audio keeps stuttering and skipping for some mili secs every now and then while listening to music.
I have tested my bluetooth headphone with three other devices and it is working fine with them. I have also tested it two different music player : Google play music and pulsar plus. Both the cases the same problem is happening.
I did a factory reset also but that did not prevent the problem.
Also whenever I am connecting my blutooth headphone, the volume is automatically set to the highest.
Tried to unpair/pair my bluetooth device also, no luck.
The stuttering problem is not happening when I am playing video file via MX player with my bluetooth headphone or while listening to music with a wired headphone.
I took logs from developers setting dated 07/04/2017 :
https://drive.google.com/open?id=0B5ucK93ckWnBTUZqZkhUVF9GWEE --> Btsnoop_hci.log
https://drive.google.com/open?id=0B5ucK93ckWnBdEdKMUJTODRGdk0 --> Interective Bug Report.
Please let me know with a definite solution. This is making my life live harder with P2.
Regards,
Krishnendu

I have same problem with MM and now(with nougat) that 's better, all work fine but when i connect my headphone the sound is at minimum and i must turn volume higher manually on the phone but after, no problem!

Bluetooth Connection Failed With Car Audio System
hi every one
after i updated my lenovoo p2a42 to Nougat i could not connect with audio system in my car .. bluetooth connected to my laptop successfully .
any solution for this case? pls
thanks

Bluetooth issues

Hi. Wondering if anybody could help. When I connect my oneplus 5T to my car I have problems. When it starts to call it disconnects the bluetooth from the car completely. However the call continues on the phone which is a complete pain as you cant use it through the hands free. Car is a BMW 630CI with pro nav if that helps.
Many Thanks

i first had problems to connect to my audi A3 bluetooth ... it simply didn´t find it
after trying again and changing the bluetooth audio codec it suddenly worked ...
Idk if it will work for you, but you can try changing the codec and se if it helps

Hi. Ive tried all 3. It connects fine and I can see my contacts but as soon as I hit dial it disconnects from the car.
Very strange.
Thanks for the suggestion tho

with mine in my car it every now and then gives me this a crackling sound.. Kind of irritating, I'm hoping a software update down the road fixes this.. I've tried all 3 codecs

Having issues with Bluetooth connection on my Prius Prime as well. It always disconnects, I had to disable Bluetooth on the phone and re-able it for it to work.
I experience the same with my Boss QC35. First connection, audio breaks with lots of noise and had to disable it and re-enable it.

Still found no solution. Hope the next update sorts it out as the bluetooth seems a mess.

So after looking around, there are issues with certain codecs and devices connecting being posted in the OP community forums. My Sony WH1000xm2 headphones stutter when using AptX HD. My JBL Everest 750NC's - if you turn the volume up too high, they disconnect from the phone. In my Cadillac ATS, whenever you place a call it'll stay connected, but you won't hear anything, and the other user can't hear you either.
I think they've acknowledged the issues and are working on them, but after putting Oreo on my Moto G5 Plus and Oreo's ability to change between all codec's on the fly (including native LDAC support!) I'm anxiously awaiting Oreo to be 'officially' released.
I'd say just be patient.. I'm sticking with this phone because I think it'll be worth it in the end. Wish I had better news!

so I resolved my Bluetooth issues by flashing FreedomOS. Now there is no intermittent crackling sound now and there is no issues at all ymmv, this was just my experience.

Thanks. Will wait for Oreo and then try different roms if it continues.

on FreedomOS before, it was giving me headache re-connecting to my Subaru car bluetooth, like after you shutoff engine, go somewhere and come back, unless you manually force connecting to the car, it barely auto reconnect back.
And also takes so long to get data sync from my Fitbit chargeHR to the app.
I don't think this kind of bluetooth issue related to what rom we have but the kernel and more specifically BT firmware.
-----edit-------
My friend also got BT issue when he tried to connect to BT headset. Hope Oneplus get something fixed on new oreo or updates

Just an update. Since upgrading to the official Oreo rom my problems have disappeared and my phone now works fine with the car Bluetooth.
Chris

I still have problems. Pause and unpause, and the track restarts. After ending a phone call the track restarts. 2018 RAM, Uconnect

With stock ROM 4.7.2 bluetooth connected only for a few seconds with my Audi A6. With every following stock ROM version it didn't even connect.
I tried every single Audio-Codec and the different settings in developer options - nothing helped. Once I cleared data & cache from the bluetooth system apps followed with a soft brick

Hi all,
Had same issues with my Hyundai ix35 and oneplus 5t (Nougat), tracks skipping, distorted audio in calls, etc... Tried emptying bluetooth cache, switching audio codecs without success. Now I just received the OTA update to Oreo (8.0), Oxygen rom 5.0.3 and it solved the issues!!! Yeay, no more auxilary cable hanging around !

fx_viper said:
Hi all,
Had same issues with my Hyundai ix35 and oneplus 5t (Nougat), tracks skipping, distorted audio in calls, etc... Tried emptying bluetooth cache, switching audio codecs without success. Now I just received the OTA update to Oreo (8.0), Oxygen rom 5.0.3 and it solved the issues!!! Yeay, no more auxilary cable hanging around !
Click to expand...
Click to collapse
I started from scratch but the issue persists.

I am having the same issue in my car. It no longer displays track information and the connection is not very stable. I will try switching the codec and report back.

i don.t have any volume control from the phone basically when i connect it to my car stereo
i can control the volume for the first 4-5 clicks ... and then the slider moves but there is no difference in the volume
i have to turn the volume from the stereo almost to the max
whit my old samsung tablet works great ... i have maybe 50% more volume then with my phone
tried all codecs ...

Android auto - Redmi note 5 pro - no sound or very very less sound on car speakers

Android version: 8.1.0.opm1.171019.011
Miui: 10.2.20
Car: Ford ecosport
When I play music/use navigation in my car's head with the phone connected, no sound or very less sound is heard.
I am using Redmi note5 pro from about 8 months, the sound was working fine but not from last month.
Debug:
1. If I turn off Bluetooth (AA will automatically turn on BT after I turn off but sound starts to play in the car)
2. If I turn on "Do not disturb" mode also the sound is played.
3. Sound issue resurfaces after I skip a couple of songs, not while music is playing but when the song changes to the next one.
Also with Redmi note 5 pro there is a serious connectivity issue I believe.
My wife's phone( Redmi note 4) always connects without any connectivity or sound problem, but my phone always won't connect(I wil have to try a couple of times) and if connects doesn't play sound(I will have to do the trick of BT or DND).

Doesn"t safe volume level warning kick in after some time ? (it reduces maximum volume )
Sent from my whyred using XDA Labs

Low Volume Bluetooth Wireless Earbuds Problem

Hello there fellow Xiaomi users, I have a problem with my Bluetooth earbuds and it's driving me insane! I hope you can help me out. When I connected my newly purchased bluetooth sony earbuds (the model is WF-XB700) I noticed that the volume was really low, maybe 50% less than it should've been. I was perplexed, but had a couple of quick ways to determine the problem. I connected the earplugs to a Iphone 8 and they worked just fine, 100% of their capacity. Then I connected my Xiaomi Mi 2A lite to some other bluetooth headphones (model Pioneer se-ms7bt) and they also worked as they should've. Then I connected the earbuds to a Xiaomi Mi A3 and to my surprise, I could also detect the Low Volume Issue there too! So, it must be something Android/Xiaomi related.
Then I went on a really energy draining odyssey on google to find a solution. What I did find was, firsty, that it was a known issue and secondly, that the myriad of solutions presented did not help me at all. This is a list of the things I tried, some of which spawned problems too :
1) Disabling absolute volume in developer settings.
2) Tinkering with all the options in the develper option - even the following (I will copy paste in from an other thread , which according to many people has worked :
Enable Developer Options (options -> system -> about phone -> click build number 7 times)
Press back
Go to settings, and search AVRCP.
Click on Bluetooth AVRCP Version and ensure it is on 1.6.
Next, search for Absolute
Select Disable Absolute Volume and turn this toggle on, if it isn't already.
Unpair all Bluetooth devices. Restart your device. Pair the devices again. To the right of each Paired Bluetooth device in the Bluetooth settings page is a gear icon, go into each device and turn off the Phone Calls toggle, leaving only Media audio enabled.
Exit settings, connect to the Bluetooth device, start playing something. Increase the volume using the volume up button and rejoice as the volume goes as loud as you need!!!
3) Putting the volume up in the Sony Headphones app. - So, officially the app doesn't support the WF-XB700. There are two options for detection. The first is a list of the supported devices (mine is not there) and the other is a ,,detect via bluetooth''. Tried the second option but it doesn't work
4) Increasing the volume on the physical buttons on the device. Mine are earbuds and have only one button for on/off
5) Ensuring the eartips are tightly fit in my ear.
6) Making sure the earbud isn't blocked by anything.
7) Resetting the phone
8) Changing the Region - This I actually did not succeed in doing. It turns out that the option to change the region has been removed. If there is a way to do it, please inform me.
9) Trying all the volume booster apps in the store.
10) Restart or enable and disable airplane mode
11) Forgeting and pairing the device again
Could the bluetooth version difference be the problem. Mine is 4.2 and the buds are 5.0. According to google there should't be a difference regarding the sound volume/quality, only range and connection strenght. Please help me, I have wasted more than five hours already and I ran out of options to try. Thanks in advance !
My current software version : Android 10 / Security patch level: October 1,2020 / Baseband version 953_GEN_PACK-1/ Kernel version: 3.18.124-perf-gceec2f0 /

Xiaomi removes Bluetooth codecs intentionally from this phone (and seems like from Mi A3 too). Because Xiaomi dont want to pay 1$ fee for codec. Thats why it works as expected on iPhone. It's all about greediness.
Same codec issue is proper on Miui roms too. This means Redmi 6 Pro has an Bluetooth codec issue too. We can probably say same thing (according to ur first post) for Mi A3 and for its Miui version Xiaomi Mi CC9e.
- Redmi 6 Pro
- Xiaomi Mi A2 Lite
- Xiaomi Mi A3
- Xiaomi Mi CC9e
All of them probably has same issue. I didnt use any flagship of Xiaomi or any other Android phone since Jelly Bean so cant say anything about other brands except Apple. I used an iPhone between those times. iPhones has proper bluetooth codecs. You cant fix it via resetting ur phone or something like that.
SBC is the default codec and none of others will work.
Qualcomm is the owner of these aptX, aptX LL, aptX HD, aptX Adaptive audio codecs. We have an qualcomm chipset on our phone too but xiaomi didnt want to pay for these to earn more money from us. So thats why we are stuck on SBC. Dont buy any android device just by looking its specs from websites. Check out everything in the shop (bluetooth, camera,..etc.) before buy.

AndreyTsvetkov said:
Hello there fellow Xiaomi users, I have a problem with my Bluetooth earbuds and it's driving me insane! I hope you can help me out. When I connected my newly purchased bluetooth sony earbuds (the model is WF-XB700) I noticed that the volume was really low, maybe 50% less than it should've been. I was perplexed, but had a couple of quick ways to determine the problem. I connected the earplugs to a Iphone 8 and they worked just fine, 100% of their capacity. Then I connected my Xiaomi Mi 2A lite to some other bluetooth headphones (model Pioneer se-ms7bt) and they also worked as they should've. Then I connected the earbuds to a Xiaomi Mi A3 and to my surprise, I could also detect the Low Volume Issue there too! So, it must be something Android/Xiaomi related.
Then I went on a really energy draining odyssey on google to find a solution. What I did find was, firsty, that it was a known issue and secondly, that the myriad of solutions presented did not help me at all. This is a list of the things I tried, some of which spawned problems too :
1) Disabling absolute volume in developer settings.
2) Tinkering with all the options in the develper option - even the following (I will copy paste in from an other thread , which according to many people has worked :
Enable Developer Options (options -> system -> about phone -> click build number 7 times)
Press back
Go to settings, and search AVRCP.
Click on Bluetooth AVRCP Version and ensure it is on 1.6.
Next, search for Absolute
Select Disable Absolute Volume and turn this toggle on, if it isn't already.
Unpair all Bluetooth devices. Restart your device. Pair the devices again. To the right of each Paired Bluetooth device in the Bluetooth settings page is a gear icon, go into each device and turn off the Phone Calls toggle, leaving only Media audio enabled.
Exit settings, connect to the Bluetooth device, start playing something. Increase the volume using the volume up button and rejoice as the volume goes as loud as you need!!!
3) Putting the volume up in the Sony Headphones app. - So, officially the app doesn't support the WF-XB700. There are two options for detection. The first is a list of the supported devices (mine is not there) and the other is a ,,detect via bluetooth''. Tried the second option but it doesn't work
4) Increasing the volume on the physical buttons on the device. Mine are earbuds and have only one button for on/off
5) Ensuring the eartips are tightly fit in my ear.
6) Making sure the earbud isn't blocked by anything.
7) Resetting the phone
8) Changing the Region - This I actually did not succeed in doing. It turns out that the option to change the region has been removed. If there is a way to do it, please inform me.
9) Trying all the volume booster apps in the store.
10) Restart or enable and disable airplane mode
11) Forgeting and pairing the device again
Could the bluetooth version difference be the problem. Mine is 4.2 and the buds are 5.0. According to google there should't be a difference regarding the sound volume/quality, only range and connection strenght. Please help me, I have wasted more than five hours already and I ran out of options to try. Thanks in advance !
My current software version : Android 10 / Security patch level: October 1,2020 / Baseband version 953_GEN_PACK-1/ Kernel version: 3.18.124-perf-gceec2f0 /
Click to expand...
Click to collapse
that's the same problem i am facing on my redmi note 5/5 Plus (Vince) got any solution? or should i change my phone

perfect_ said:
Xiaomi removes Bluetooth codecs intentionally from this phone (and seems like from Mi A3 too). Because Xiaomi dont want to pay 1$ fee for codec. Thats why it works as expected on iPhone. It's all about greediness.
Same codec issue is proper on Miui roms too. This means Redmi 6 Pro has an Bluetooth codec issue too. We can probably say same thing (according to ur first post) for Mi A3 and for its Miui version Xiaomi Mi CC9e.
- Redmi 6 Pro
- Xiaomi Mi A2 Lite
- Xiaomi Mi A3
- Xiaomi Mi CC9e
All of them probably has same issue. I didnt use any flagship of Xiaomi or any other Android phone since Jelly Bean so cant say anything about other brands except Apple. I used an iPhone between those times. iPhones has proper bluetooth codecs. You cant fix it via resetting ur phone or something like that.
SBC is the default codec and none of others will work.
Qualcomm is the owner of these aptX, aptX LL, aptX HD, aptX Adaptive audio codecs. We have an qualcomm chipset on our phone too but xiaomi didnt want to pay for these to earn more money from us. So thats why we are stuck on SBC. Dont buy any android device just by looking its specs from websites. Check out everything in the shop (bluetooth, camera,..etc.) before buy.
Click to expand...
Click to collapse
They are literally making 1$ per phone. Stop spreading missinformation

Connection problem with Powerbeats Pro

Hi guys, i have a pair of Apple Powerbeats Pro and i can't connect it properly with my Mi A2 Lite (Custom ROM: crDroid 7.4 - Android 11). After some seconds the sound stops.
I found a similar problem on XDA, i tried to switch kernel and change settings of bluetooth codec but nothing is changed. I think is a hw problem of weak antenna, i don't know.
There is any workaround or solution?
Thanks!