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

[Cyrus Harmon]

Hi Takashi,

Clemens has sent me another diagnostic/debugging patch to try. Perhaps 
we should wait to see the results of that before pushing to for-next. If 
we don't get a deeper understanding of the problem in the next couple of 
days, I'll send along the original patch.

thanks,

Cyrus

On 11/05/2014 03:14 PM, Takashi Iwai wrote:
> At Tue, 04 Nov 2014 00:55:11 -0800,
> Cyrus Harmon wrote:
>>
>> I have used a number of 3.1x kernels. At the moment, I'm writing this
>> from a 3.17.0 kernel that doesn't recognize the UR44 without my patch.
> OK, could you repost the patch (and put me to Cc) so that I can apply
> to for-next branch?
>
>
> thanks,
>
> Takashi
>
>
>> thanks,
>>
>> Cyrus
>>
>> On 11/03/2014 10:28 PM, Takashi Iwai wrote:
>>> 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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