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

[Cyrus Harmon]

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?

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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