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Jelly Bean 4.2.x, Change in Bluetooth Behaviour ?Support


  1. geoffwh

    geoffwh New Member

    Has anyone noticed a change in behavior of a bluetooth connected headset after the 4.2.x upgrade? Since the upgrade, bluetooth spontaneously disconnects after a short idle period, which means that an incoming call is not extended to my headset to be answered.

    UK driving law makes handling a cell phone whilst driving illegal, so this new behavior is annoying. (Answering a call via a headset button is OK.)

    (Galaxy Nexus, Android 4.2.1, Plantronics Voyager Pro BT Headset)

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  2. Metroid Prime

    Metroid Prime Oil Can!!! Oil Can!!! VIP Member

    Welcome to AF, geoffwh and sorry to hear about your issue. Have you considered a factory reset? Sometimes a software upgrade can cause bugs and issues and doing a factory reset can usually correct these issues. :)
  3. tube517

    tube517 Well-Known Member Contributor

    I've read in other forums about bluetooth issues with JB. Supposedly, the 4.2.1 update was supposed to fix "some" BT issues. However, it doesn't seem like it fixed all BT issues. My phone is rooted with maguro 4.2.1 and the BT works perfect.
  4. aurora40

    aurora40 Well-Known Member

    I have issues with BT sometimes. When it acts up, it won't connect (though the phone shows it as connected), and you also can't turn it off (the phone shows it as "turning off" for hours).

    Mostly it works, but when it doesn't, I have to restart the phone. I did a factory reset, it did not fix this particular issue. And I did not have any BT issues prior to 4.2.
  5. quickaudi

    quickaudi Well-Known Member Contributor

    Having the same issue with mine disconnecting on 4.2.1 as well
  6. aurora40

    aurora40 Well-Known Member

    I'm getting the disconnect issue as well.
  7. geoffwh

    geoffwh New Member

    OK, I've tried a factory reset and am still having BT problems as previously described. I've haven't tried running without any apps to see if one of those is causing a problem. I'll just accept that BT is broken in 4.2.1 and I can no longer use my 'phone whilst driving.
  8. The_Chief

    The_Chief Accept no imitations! Moderator

    Mine disconnects and then reconnects immediately as well. 4.2.1 toro
  9. geoffwh

    geoffwh New Member

    *Update* I installed a third-party voice dialer some months ago, because Google Search performance was sub-optimal. I've just un-installed the dialer and after preliminary testing the BT problems seem to have gone. Further, I find Google Search voice dialing performance is significantly improved in JB 4.2.n, maybe to give a usable solution.
  10. CharlzO

    CharlzO Well-Known Member

    From the Sourcery Devs, google changed something in the BT Stacks for 4.2 which has been wonky. I've had some issues myself, including the "turning off" deal. But, overall I'm enjoying the 4.2 goodness enough that it outweighs the little things, and I'm sure it'll get rectified soon.
  11. mtbhk44

    mtbhk44 Well-Known Member

    I've said this in a few threads, so forgive me being a broken record if you've read this before. The sound is just terrible with this new 4.2 bluetooth stack. Anything in the upper range is distorted and tinny. It's like listening to the worst possible MP3 rip you've got in your collection, except that it's on every song. I've actually rolled back to 4.1.2 until they fix this mess they've made. I guess the devs over at Google were strictly wired in when listening to the music b/c the sound is really terrible. Huge whiff here.
  12. elric999uk

    elric999uk Active Member

    i know it's been a while since this question was posed but i had the same problem, all solved by an app called Bluetooth Keepalive by Alexander Brickwedde that's available in the pay store, now my BT stays connected to my headset or car stero without drop outs. there's a fair bit of compatibility info on the store so do check that out first.
  13. jhawkkw

    jhawkkw Chinchillin' Moderator

    4.2.2 is suppose to contain bug fixes to bluetooth. So if possible, update to that and it might normalize.
  14. aurora40

    aurora40 Well-Known Member

    FWIW, I haven't gotten the BT disconnect thing so far on 4.2.2. But it is pretty early to tell, as I only got the update this morning.
  15. val88

    val88 Well-Known Member

    Maybe its the version of BT on your devices.

    I have JB on both my GN and N7. I keep my BT on 24/7 on the phone and part time on the N7. On my phone, its connected to my car whenever I turn the car on since the phone essentially replaces my car stereo so I use it a lot. I can't recall a single disconnect between my car and my phone.

    On my N7, I use it with a set of BT headphone (and occasionally I do the same on my phone). Neither has any problems as well. I use it for about 30 minutes/day.

    My car's BT was upgraded last year by the manufacturer so its pretty recent. Maybe thats the difference.
  16. skaligotla

    skaligotla New Member

    Please disable the power saving option. This has fixed my Bluetooth disconnecting problem on my android 4.2.1 I am happy with my Bluetooth device..
  17. Mayhem

    Mayhem Well-Known Member Contributor

    Bluetooth is fine under CM10.2.1. It's JB 4.3.1.

    At least I've not noticed any disconnects with my BlueAnt S4...
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