[alsa-devel] Regression in sound/usb/

[Daniel Mack]

On 11.07.2012 09:30, Philipp Dreimann wrote:
> On 10 July 2012 23:14, Daniel Mack <zonque at gmail.com> wrote:
>> 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.
> 
> The camera is now working for a short time:
> [   56.421399] usb 2-1.2: new high-speed USB device number 4 using ehci_hcd
> [   57.224234] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
> [   57.237221] 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/input15
> Camera and microphone are working. Some time later we're back to the old issue:

Ok, I see. Drop this, I'm working on a new one. I will find some time
later today to look into this. Thanks for your patience!


Daniel