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From: Jan Rychter <jan@rychter.com>
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Subject: [Bluez-users] Re: Motorola HS-850 and btsco
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Date: Wed, 13 Apr 2005 14:53:24 +0900

I wrote:
> I've been trying to get my Motorola HS-850 headset to work with btsco,
> using two different USB adapters.
> 
> It seems I'm getting quite far: I can pair the devices, btsco can
> connect, and it can detect button presses:
> 
> # btsco -v 00:07:A4:5C:39:F7 1
> btsco v0.4
> Device is 1:0
> Voice setting: 0x0060
> RFCOMM channel 1 connected
> recieved AT+CKPD=200
> recieved AT+CKPD=200
> 
> The headset reports as:
> 
> # hcitool info 00:07:A4:5C:39:F7
> Requesting information ...
>         BD Address:  00:07:A4:5C:39:F7
>         Device Name: Motorola HS850
>         LMP Version: 1.2 (0x2) LMP Subversion: 0x5dd
>         Manufacturer: Cambridge Silicon Radio (10)
>         Features: 0xfc 0xff 0x8b 0xf8 0x18 0x18 0x00 0x80
>                 <encryption> <slot offset> <timing accuracy> <role switch> 
>                 <hold mode> <sniff mode> <park state> <RSSI> <channel quality> 
>                 <SCO link> <HV2 packets> <HV3 packets> <u-law log> <A-law log> 
>                 <CVSD> <paging scheme> <transparent SCO> <broadcast encrypt> 
>                 <enhanced iscan> <interlaced iscan> <interlaced pscan> 
>                 <inquiry with RSSI> <extended SCO> <AFH cap. slave> 
>                 <AFH class. slave> <AFH cap. master> <AFH class. master> 
>                 <extended features> 
> 
> The problem is that I don't get audio. When I try audio playback or
> recording, I do get a static hiss in the headset and lots of SCO packets
> appear on the link (checked with hcidump).
> 
> I also checked that the volumes are set to max using "alsamixer -c1 -V
> all". Tried aplay/arecord, sox, xmms with output to plughw:Headset, all
> produce exactly the same effect.
> 
> Kernel 2.6.11, two different USB dongles (one BCM2033-based, one an
> IOGear GBU-311 (thanks, Marcel!)). Same results.
> 
> What else there is to try?

[...several days of silence...]

Any other information I can provide, or should I just give up?

thanks,
--J.



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