[alsa-devel] Regression in sound/usb/

[Daniel Mack]

On 05.07.2012 17:36, Takashi Iwai wrote:
> At Thu, 5 Jul 2012 17:32:30 +0200,
> Philipp Dreimann wrote:
>>
>> On 5 July 2012 16:41, Takashi Iwai <tiwai at suse.de> wrote:
>>>> Try the patch below.  If it still doesn't work, give the kernel
>>>> message again and lsusb -v output, too.
>>>
>>> Did it make any difference?
>>
>> No, it unfortunately did not.
>>
>> lsusb is attached and the parts of the kernel log are in the mail:
>>
>> [   41.243211] usb 2-1.2: new high-speed USB device number 3 using ehci_hcd
>> [   41.605666] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
>> [   42.002275] input: UVC Camera (046d:0821) as
>> /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/input/input12
>> [   42.085880] usbcore: registered new interface driver snd-usb-audio
>>
>> [   52.790139] uvcvideo: Failed to query (GET_DEF) UVC control 2 on
>> unit 2: -71 (exp. 2).
>> [   52.794363] uvcvideo: Failed to query (GET_DEF) UVC control 2 on
>> unit 2: -71 (exp. 2).
>> [   52.798375] uvcvideo: Failed to query (GET_DEF) UVC control 3 on
>> unit 2: -71 (exp. 2).
>> [   52.802499] uvcvideo: Failed to query (GET_DEF) UVC control 7 on
>> unit 2: -71 (exp. 2).
>> [   52.806617] uvcvideo: Failed to query (GET_DEF) UVC control 11 on
>> unit 2: -71 (exp. 1).
>> [   52.810734] uvcvideo: Failed to query (GET_DEF) UVC control 4 on
>> unit 2: -71 (exp. 2).
>> [   52.814855] uvcvideo: Failed to query (GET_DEF) UVC control 5 on
>> unit 2: -71 (exp. 1).
>> [   52.818976] uvcvideo: Failed to query (GET_CUR) UVC control 11 on
>> unit 2: -71 (exp. 1).
>> [   52.823096] uvcvideo: Failed to query (GET_DEF) UVC control 8 on
>> unit 2: -71 (exp. 2).
>> [   52.827215] uvcvideo: Failed to query (GET_DEF) UVC control 1 on
>> unit 2: -71 (exp. 2).
>> [   52.831331] uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
>> [   52.835459] uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
>> The last line repeats a few times, then the Failed to query block
>> repeats again, and so on. But only if I try to use the webcam.
>>
>> [   82.363599] 3:1:3: cannot set freq 32000 to ep 0x86
>> Is showing up without using the webcam.
> 
> Hm, it looks better than before (it was '3:-1:3' or such), but there
> is still something strange there.

Sorry for the long delay on this. I finally found some time to look into
this and it seems that I got the calls to usb_set_interface wrong.
Attached is a patch to fix this - could everybody who is affect please
give that a quick try? More explanation is in the commit log.


Thanks,
Daniel


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