USB-> bluetooth adapter problem

USB-> bluetooth adapter problem

[Luke Albers]

I have a 3com USB bluetooth adapter, that worked for  me at one time, 
that I can't get working anymore.

The model is 3CREB96B

Sometimes it isnt even noticed when I plug it in, but after restarting 
hotplug I get this:

usb 4-1: new full speed USB device using uhci_hcd and address 2
hci_usb_probe: Can't set isoc interface settings
usb 4-1: USB disconnect, address 2

I don't think that I have removed any options from the kernel that 
should cause this, and other USB devices work fine.

Can someone please explain this message in more detail (google turns up 
very little)?

Thanks

Re: USB-> bluetooth adapter problem

[Marcel Holtmann]

Hi Luke,

> I have a 3com USB bluetooth adapter, that worked for  me at one time, 
> that I can't get working anymore.
> 
> The model is 3CREB96B
> 
> Sometimes it isnt even noticed when I plug it in, but after restarting 
> hotplug I get this:
> 
> usb 4-1: new full speed USB device using uhci_hcd and address 2
> hci_usb_probe: Can't set isoc interface settings
> usb 4-1: USB disconnect, address 2
> 
> I don't think that I have removed any options from the kernel that 
> should cause this, and other USB devices work fine.
> 
> Can someone please explain this message in more detail (google turns up 
> very little)?

try to load the hci_usb driver with "isoc=0". This disables the SCO
support inside the driver.

Regards

Marcel

Re: USB-> bluetooth adapter problem

[Luke Albers]

Marcel Holtmann wrote:

>Hi Luke,
>
>  
>
>>I have a 3com USB bluetooth adapter, that worked for  me at one time, 
>>that I can't get working anymore.
>>
>>The model is 3CREB96B
>>
>>Sometimes it isnt even noticed when I plug it in, but after restarting 
>>hotplug I get this:
>>
>>usb 4-1: new full speed USB device using uhci_hcd and address 2
>>hci_usb_probe: Can't set isoc interface settings
>>usb 4-1: USB disconnect, address 2
>>
>>I don't think that I have removed any options from the kernel that 
>>should cause this, and other USB devices work fine.
>>
>>Can someone please explain this message in more detail (google turns up 
>>very little)?
>>    
>>
>
>try to load the hci_usb driver with "isoc=0". This disables the SCO
>support inside the driver.
>
>Regards
>
>Marcel
>
>
>
>  
>
Thanks for your reply.

Under "Bluetooth subsystem support" I removed support for "SCO links 
support", and then under "Bluetooth device drivers" I removed SCO 
(voice) support.  What is still left:

HCI USB driver
HCI UART driver
      -UART (H4) protocol support
      -BCSP protocol support
HCI BCM203x USB driver
HCI BlueFRITZ! USB driver
HCI VHCI (Virtual HCI device) driver

I realize that some of these shouldnt be in there, but I don't think 
they are causing problems, either.  Anyway, after I removed the items 
mentioned above, and after plugging in the bluetooth adapter, this is 
what I get:

Oct  9 20:24:17 Obliterus usb 4-1: new full speed USB device using 
uhci_hcd and address 2
Oct  9 20:24:18 Obliterus usb 4-1: USB disconnect, address 2
Oct  9 20:24:18 Obliterus Bluetooth: HCI USB driver ver 2.8
Oct  9 20:24:18 Obliterus usbcore: registered new driver hci_usb

So it looks like it immediately disconnects.  It doesn't show up with 
lspci at all either.  I havent tried using the hci_usb as a module and 
setting isoc=0 yet, but am I correct that removing the SCO stuff from 
the kernel took care of the problem, since I no longer get the same message? 


Thanks

Re: USB-> bluetooth adapter problem

[Marcel Holtmann]

Hi Luke,

> Under "Bluetooth subsystem support" I removed support for "SCO links 
> support", and then under "Bluetooth device drivers" I removed SCO 
> (voice) support.  What is still left:
> 
> HCI USB driver
> HCI UART driver
>       -UART (H4) protocol support
>       -BCSP protocol support
> HCI BCM203x USB driver
> HCI BlueFRITZ! USB driver
> HCI VHCI (Virtual HCI device) driver
> 
> I realize that some of these shouldnt be in there, but I don't think 
> they are causing problems, either.  Anyway, after I removed the items 
> mentioned above, and after plugging in the bluetooth adapter, this is 
> what I get:
> 
> Oct  9 20:24:17 Obliterus usb 4-1: new full speed USB device using 
> uhci_hcd and address 2
> Oct  9 20:24:18 Obliterus usb 4-1: USB disconnect, address 2
> Oct  9 20:24:18 Obliterus Bluetooth: HCI USB driver ver 2.8
> Oct  9 20:24:18 Obliterus usbcore: registered new driver hci_usb
> 
> So it looks like it immediately disconnects.  It doesn't show up with 
> lspci at all either.  I havent tried using the hci_usb as a module and 
> setting isoc=0 yet, but am I correct that removing the SCO stuff from 
> the kernel took care of the problem, since I no longer get the same message? 

build them as modules and do what I told you. Check what lsusb says and
what's in /proc/bus/usb/devices. What kernel version are you using?

Regards

Marcel

Re: USB-> bluetooth adapter problem

[Luke Albers]

>>I have a 3com USB bluetooth adapter, that worked for  me at one time, 
>>that I can't get working anymore.
>>
>>The model is 3CREB96B
>>
>>Sometimes it isnt even noticed when I plug it in, but after restarting 
>>hotplug I get this:
>>
>>usb 4-1: new full speed USB device using uhci_hcd and address 2
>>hci_usb_probe: Can't set isoc interface settings
>>usb 4-1: USB disconnect, address 2
>>
>>I don't think that I have removed any options from the kernel that 
>>should cause this, and other USB devices work fine.
>>
>>Can someone please explain this message in more detail (google turns up 
>>very little)?
>>    
>>

I got another one of these adapters, and when I plug the new one in I get:

usb 4-1: new full speed USB device using uhci_hcd and address 2
Bluetooth: HCI USB driver ver 2.8
usbcore: registered new driver hci_usb
hcid[30219]: Bluetooth HCI daemon
hcid[30219]: HCI dev 0 up
hcid[30219]: Starting security manager 0

Then I remove that one and plug in the original and get the old problem:

usb 4-1: new full speed USB device using uhci_hcd and  address 3
hcid[30219]: HCI dev 0 registered
usb 4-1: USB disconnect, address 3
hcid[1984]: Can't init device hci0: No such device (19 )
hcid[30219]: HCI dev 0 unregistered

So the old one I was using seems to be a bad device, I just want to ask 
if there are any other possibilities, other than bad hardware, before I 
get rid of it.

Thanks

Re: USB-> bluetooth adapter problem

[Marcel Holtmann]

Hi Luke,

> I got another one of these adapters, and when I plug the new one in I get:
> 
> usb 4-1: new full speed USB device using uhci_hcd and address 2
> Bluetooth: HCI USB driver ver 2.8
> usbcore: registered new driver hci_usb
> hcid[30219]: Bluetooth HCI daemon
> hcid[30219]: HCI dev 0 up
> hcid[30219]: Starting security manager 0
> 
> Then I remove that one and plug in the original and get the old problem:
> 
> usb 4-1: new full speed USB device using uhci_hcd and  address 3
> hcid[30219]: HCI dev 0 registered
> usb 4-1: USB disconnect, address 3
> hcid[1984]: Can't init device hci0: No such device (19 )
> hcid[30219]: HCI dev 0 unregistered
> 
> So the old one I was using seems to be a bad device, I just want to ask 
> if there are any other possibilities, other than bad hardware, before I 
> get rid of it.

I have no answer to this, but it looks like bad hardware. If you don't
wanna return it, you can send the adapter to me for some testing.

Regards

Marcel