Hi Clemens,
Thanks for the tip. Will look into the patch!
This is a laptop so all the ports sit on top of an internal hub which has
two main usb ports ..so its not possible to connect it directly..it has to
go through the hub.
I was also wondering, if the problem is with the EHCI driver, why does the
zoom g9 (also a usb 1 device) work properly in duplex mode? I was just
looking at the dmesg output and cant see anything significantly different.
regards,
Bharat
Xstation dmesg output (copied from pastebin)
1. [ 4180.097600] usb 2-1.3: new full speed USB device number 5 using
ehci_hcd
2. [ 4180.202969] input: Novation DMS XStation as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.5/input/input12
3. [ 4180.203267] generic-usb 0003:1235:0006.0002: input,hidraw1: USB
HID v1.00 Device [Novation DMS XStation] on usb-0000:00:1d.0-1.3/input5
4. [ 4180.299862] usbcore: registered new interface driver
snd-usb-audiozoo
Zoom dmesg output
1. [ 1407.691982] usb 2-1.3: new full speed USB device number 4 using
ehci_hcd
2. [ 1407.773008] input: Burr-Brown from TI USB Audio
CODEC as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.3/input/input12
3. [ 1407.773331] generic-usb 0003:08BB:2904.0002: input,hidraw1: USB
HID v1.00 Device [Burr-Brown from TI USB Audio CODEC ] on
usb-0000:00:1d.0-1.3/input3
4. [ 1407.863809] usbcore: registered new interface driver snd-usb-audio
On Tue, Nov 1, 2011 at 8:49 AM, Clemens Ladisch <cladi...@googlemail.com>wrote:
> Bharat Rajagopalan wrote:
> > I have an old Novation X-Station 25 ...
> > It just refuses to work in duplex mode.
>
> This is a known bug in the EHCI driver. If your chipset also has OHCI
> ("Open") or UHCI ("Universal") controllers, try connecting the device
> directly to the PC without a hub.
>
> There's a recent patch that works around the most common instances of
> this bug; it's likely to help you:
> http://marc.info/?l=linux-usb&m=131973404328622
>
>
> Regards,
> Clemens
>
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