Re: [Bluez-users] 3 or more BT dongles over 1 USB-2.0 4-port HUB

["Jaime Alberto Silva" <jaimealbertosilva@gmail.com>]

Could it be a power problem? maybe your USB port can't supply enough
power to all the devices.

On 9/11/06, petr@palacky.net <petr@palacky.net> wrote:
> Hi Marcel,
>
> thank you for your tip.
>
> I tried loading hci_usb with option isoc=3D0, but still nothing happens.
> I don't think if this is question for USB Guys, because other devices eg.
> printer, mouse, keyboard, flash-disk etc. works fine and all together
> attached into one USB HUB.
> I think this is problem with any component from bluez stack...
>
> BR
> Petr
>
> Dne 11 Z=E1=F8=ED 2006, 20:10, Marcel Holtmann napsal(a):
> > Hi Petr,
> >
> >
> >> i have problem with three (and more) USB BT dongles (all are the same,
> >> CSR-based) and 4-port USB-2.0 HUB.
> >>
> >>
> >> When i attach one USB dongle alone, everything is good (hci0 is up and
> >> running). When i attach the second dongle (after the first), still is
> >> everything OK (hci0 and hci1 are up and running). But when i attach
> >> third (or fourth) dongle, this does not work.
> >>
> >> I tried attaching all dongles differently but every time the third (or
> >> fourth) dongle is not OK and dmesg says: #dmesg
> >> hci_usb_intr_rx_submit: hci2 intr rx submit failed urb cd55b674 err -28
> >>
> >
> > try loading the hci_usb driver with the isoc=3D0 option. This maybe hel=
ps,
> > but it can also be a general problem with your USB root hub. In that ca=
se
> > you have to check with the USB guys, because this is not Bluetooth
> > specific.
> >
> > Regards
> >
> >
> > Marcel
> >
> >
> >
> >
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-- =

Jaime Alberto Silva
   L I N U X      .~.
The Choice     /V\
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