Re: [Bluez-devel] btsco: Operation not supported

[Sergey Smirnov <svs1957@gmail.com>]

I have the same problem with bluez-utils 3.7
Then I compile version 3.9.
I think that problem in hcid.
I can stop it only by kill -9

I have Socket CF BT card on PDA. I'll try to find information is it support SCO.
Thanks

Mayank BATRA wrote:
>> Here hciconfig -a
>> hci0:   Type: PCCARD
>>         BD Address: 00:E0:03:25:7C:36 ACL MTU: 340:4 SCO MTU: 0:0
>>         UP RUNNING PSCAN ISCAN
>>         RX bytes:204 acl:0 sco:0 events:15 errors:0
>>         TX bytes:382 acl:0 sco:0 commands:15 errors:0
>>         Features: 0xbf 0x00 0x20 0x00 0x00 0x00 0x00 0x00
>>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1
>>         Link policy: RSWITCH HOLD SNIFF PARK
>>         Link mode: SLAVE ACCEPT
>>         Name: 'svs-zaurus-0'
>>         Class: 0x3e0100
>>         Service Classes: Networking, Rendering, Capturing, 
>> Object Transfer, Audio
>>         Device Class: Computer, Uncategorized
>>         HCI Ver: 1.1 (0x1) HCI Rev: 0x0 LMP Ver: 1.1 (0x1) 
>> LMP Subver: 0x21a
>>         Manufacturer: Nokia Mobile Phones (1)
> 
> It took me a while to understand this confusing situation.
> 
> The reason for this behaviour is very simple.
> Have a look at the Features of your device: 0xbf 0x00 0x20 0x00 0x00
> 0x00 0x00 0x00
> Here, byte 0 is 0xbf, byte 1 is 0x00. If you decode these numbers from
> the bluetooth specs, bit 3 of byte 1 stands for SCO link. In your case
> it is 0 which means your device does not support SCO links at all. Get
> yourself a new dongle :(
> Now you would ask me why does the packet type shows HV1? This is because
> HV1 is mandatory if the device supports SCO link. So this is just a
> mistake done by hciconfig. It should report HV1 packet type only if SCO
> link bit is 1. In case it is 0 do not mention HV1.
> 
> Hope this helps.
> 
> Best Regards,
> 
> Mayank
> 
> 


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