Patch works brilliantly. I built a custom kernel on ubuntu 11.10 based on the latest lowlatency kernel config from the ppa and the Xstation now works in duplex :). Hope this makes it to a mainstream build soon.
Still have the problems with alsamixer...but skype works with it over the pulseaudio-jack module, so am not too fussed..
Will be testing it more thoroughly with ardour/jackd over the weekend.
Thanks a lot Clemens.
regards,
Bharat
On Wed, Nov 2, 2011 at 8:48 PM, Bharat Rajagopalan <mendred@xxxxxxxxx> wrote:
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,BharatXstation dmesg output (copied from pastebin)
- [ 1407.691982] usb 2-1.3: new full speed USB device number 4 using ehci_hcd
- [ 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
- [ 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
- [ 1407.863809] usbcore: registered new interface driver snd-usb-audio
On Tue, Nov 1, 2011 at 8:49 AM, Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> 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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