Re: USB-> bluetooth adapter problem

From: Luke Albers (gtg940r_at_mail.gatech.edu)
Date: 10/10/05

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    Date:	Sun, 09 Oct 2005 20:43:12 -0400
To: linux-kernel-Mailing-list <linux-kernel@vger.kernel.org>

    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
    -
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