[alsa-devel] [PATCH] add Steinberg UR44 USB Audio Interface support to quirks-table

[Takashi Iwai]

At Mon, 03 Nov 2014 16:36:58 -0800,
Cyrus Harmon wrote:
> 
> 
> Well, it's 7 months on and I'm still using a patched kernel to access my 
> UR44. Any chance of either seeing my original patch committed, or some 
> suggestions on a more proper fix, if there's something with my original 
> patch?

Which kernel version are you testing?


Takashi

> 
> thanks,
> 
> Cyrus
> 
> On 03/17/2014 09:29 AM, Cyrus Harmon wrote:
> > On Mar 11, 2014, at 1:31 AM, Clemens Ladisch <clemens at ladisch.de> wrote:
> >
> >> Cyrus Harmon wrote:
> >>> On Mar 10, 2014, at 8:40 AM, Clemens Ladisch <clemens at ladisch.de> wrote:
> >>>> In theory, kernel 3.11 and later should support this device without
> >>>> a quirk entry.  I guess it actually does not?
> >>> no, the stock kernel doesn’t support this device.
> >> Strange; in theory, the driver should be able to pick up these
> >> descriptors.
> >>
> >> Are there any error messages in the system log when you plug it in or
> >> reload the unpatch snd-usb-audio driver?
> > Following up on this from last week, here’s the error message I see with an unpatched kernel:
> >
> > Mar 11 02:25:11 cbox kernel: [   82.426640] usb 2-1.6: new high-speed USB device number 4 using ehci-pci
> > Mar 11 02:25:12 cbox kernel: [   82.515364] usb 2-1.6: New USB device found, idVendor=0499, idProduct=150e
> > Mar 11 02:25:12 cbox kernel: [   82.515368] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > Mar 11 02:25:12 cbox kernel: [   82.515370] usb 2-1.6: Product: Steinberg UR44
> > Mar 11 02:25:12 cbox kernel: [   82.515372] usb 2-1.6: Manufacturer: Yamaha Corporation
> > Mar 11 02:25:12 cbox kernel: [   82.518134] snd-usb-audio: probe of 2-1.6:1.0 failed with error -5
> > Mar 11 02:25:12 cbox kernel: [   82.523317] snd-usb-audio: probe of 2-1.6:1.1 failed with error -5
> > Mar 11 02:25:12 cbox mtp-probe: checking bus 2, device 4: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6"
> > Mar 11 02:25:12 cbox mtp-probe: bus: 2, device: 4 was not an MTP device
> >
> > Any suggestions for further debugging this?
> >
> > Also, from an earlier message,
> >
> > On Mar 10, 2014, at 8:40 AM, Clemens Ladisch <clemens at ladisch.de> wrote:
> >
> >> This sounds as if the playback stream needs to be synchronized to the
> >> recording stream
> > Any pointers on where I might look to figure out how to do this?
> >
> > thanks again,
> >
> > Cyrus
> >
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> 
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