[Bluez-devel] SCO audio packets dropping

[Bluez-devel] SCO audio packets dropping

[ubaldo]

Hi, 

With kernel 2.4.22, hcitools 2.2 and voice set 0x0060 HV1 if I play what I 
recorded (aplay -f S16_LE) the voice is a little bit quicker than normal. If 
I set voice as 0x0040 and "aplay -f S8" everything is perfect. 

With kernel 2.6.6 and voice 0x0060 HV1 everything is ok until I set the 
packet type as HV3, then same problem as with kernel 2.4.22. 

The quality link is always 255. 

I thought it could be an hardware packet dropping problem, but I did the 
test with the same computer just changing kernel and some parameter. 

Is this a known problem?


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Re: [Bluez-devel] SCO audio packets dropping

[Marcel Holtmann]

Hi,

> With kernel 2.4.22, hcitools 2.2 and voice set 0x0060 HV1 if I play what I 
> recorded (aplay -f S16_LE) the voice is a little bit quicker than normal. If 
> I set voice as 0x0040 and "aplay -f S8" everything is perfect. 
> 
> With kernel 2.6.6 and voice 0x0060 HV1 everything is ok until I set the 
> packet type as HV3, then same problem as with kernel 2.4.22. 

try 2.4.22-mh6 and don't modify the packet types. Let the link manager
be able to choose between HV1, HV2 and HV3.

Regards

Marcel




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Re: SCO audio packets dropping

[ubaldo]

>> With kernel 2.4.22, hcitools 2.2 and voice set 0x0060 HV1 if I play what I 
>> recorded (aplay -f S16_LE) the voice is a little bit quicker than normal. If 
>> I set voice as 0x0040 and "aplay -f S8" everything is perfect.  
>> 
>> With kernel 2.6.6 and voice 0x0060 HV1 everything is ok until I set the 
>> packet type as HV3, then same problem as with kernel 2.4.22. 
> 
> try 2.4.22-mh6 and don't modify the packet types. Let the link manager
> be able to choose between HV1, HV2 and HV3.

If I don't set HV3 I always get "Address already in use"... 

[Bluez-devel] Re: SCO audio packets dropping

[Marcel Holtmann]

Hi,

> >> With kernel 2.6.6 and voice 0x0060 HV1 everything is ok until I set the 
> >> packet type as HV3, then same problem as with kernel 2.4.22. 
> > 
> > try 2.4.22-mh6 and don't modify the packet types. Let the link manager
> > be able to choose between HV1, HV2 and HV3.
> 
> If I don't set HV3 I always get "Address already in use"... 

the default packet type value is "DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3"
and you should keep it.

Regards

Marcel




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