Hello all
Sorry, I haven't been following the USB list(s) for some time, so, maybe
it is all known and discussed multiple times...
I've got a PCI ALi OHCI / EHCI USB card in my PC, to which I attach a 2.0
hub, then a 2.0 card-reader and a 1.1 Bluetooth. I guess, it shouldn't be
a problem to mix them like this? Under 2.6.9, 10 this was failing in
different ways - anyway, if ehci is loaded, bluetooth was non-functional.
>From dmesg it looks like if ehci is loaded, it takes the full control over
all devices behind the hub, even over 1.1 ones. If ehci is unloaded, while
ohci is loaded, ohci takes the hub over, re-scans it, takes control over
it. I thought, on a 2.0 controller ehci controls high-speed devices, while
the respective 1.1 companion high- and low-speed ones. Or it only works
this way for directly connected devices? I seem to remember there were
some problems with hubs on 2.0 USB, or was it when connecting 1.1 hub to a
2.0 port?
I think, I did have this configuration before - 2.0 hub with mixed 2.0 and
1.1 devices, but that was a VIA uhci / ehci controller, around 2.6.8
perhaps? And it did work.
Anyway, under 2.6.11, it works, although I still got on Bluetooth plug-in:
usb 1-6.4: new full speed USB device using ehci_hcd and address 4
usb 1-6.4: device descriptor read/64, error -32
usb 1-6.4: device descriptor read/64, error -32
usb 1-6.4: new full speed USB device using ehci_hcd and address 5
Bluetooth: HCI USB driver ver 2.8
usbcore: registered new driver hci_usb
hci_usb_isoc_rx_submit: hci0 isoc rx submit failed urb da8b5214 err -12
hci_usb_isoc_rx_submit: hci0 isoc rx submit failed urb da8b5214 err -12
But then it seems to work. And the card-reader works too! What still
surprises me is that it says
new full speed USB device using ehci_hcd and address 5
^^^^ ^^^^^^^^
Is it supposed to work this way now?
It does seem to be a good improvement over 2.6.9, 10, anyway!
Thanks
Guennadi
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Guennadi Liakhovetski
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