[alsa-devel] REGRESSION: Webcam mic for 145f:015b not longer working with 1.0.24 and above (OK with 1.0.23)

[Daniel Mack]

On 28.08.2012 10:56, Kostas wrote:
> On 28/08/2012 11:50 πμ, Daniel Mack wrote:
>> On 28.08.2012 10:47, Kostas wrote:
>>> On 28/08/2012 08:44 πμ, Daniel Mack wrote:
>>>> On 28.08.2012 00:19, Kostas wrote:
>>>>> On 27/08/2012 06:54 μμ, Kostas wrote:
>>>>>> On 27/08/2012 02:44 μμ, Daniel Mack wrote:
>>>>>>> On 27.08.2012 12:33, Kostas wrote:
>>>>>>>> On 27/08/2012 12:26 μμ, Daniel Mack wrote:
>>>>>>>>> On 27.08.2012 11:00, Kostas wrote:
>>>>>>>>>> Hi All,
>>>>>>>>>>
>>>>>>>>>> I have a 'Trust Webcam' (USB ID: 145f:015b) that comes with a
>>>>>>>>>> microphone.
>>>>>>>>>> The microphone works with Alsa 1.0.23 but it does not work with the
>>>>>>>>>> latest Alsa 1.0.25 neither with Alsa 1.0.24.
>>>>>>>>>> Apparently this is a regression.
>>>>>>>>>>
>>>>>>>>>> What shall I do to figure out the source of the problem?
>>>>>>>>>>
>>>>>>>>>> Here are attached my alsa-infos, with Alsa 1.0.23 (working),
>>>>>>>>>> 1.0.24 (NOT
>>>>>>>>>> working) and 1.0.25 (NOT working).
>>>>>>>>> Can you provide dmesg protocols for both a working and a non-working
>>>>>>>>> case please?
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Below are attached the dmesg files.
>>>>>>>>
>>>>>>> Thanks - the logs look both good, I guess the interesting messages are
>>>>>>> only generated once you try to start the stream. Can you try this?
>>>>>> How i do that?
>>>>>> I tried to make a test call in skype and also recording a video in
>>>>>> cheese but no changes in dmesg.
>>>>>> Is there another way to start the stream?
>>>>> Also tried to record voice with sound recorder...with alsa 1.0.23
>>>>> recording is fine..i hear my voice when playback the file but with alsa
>>>>> 1.0.24 and above nothing is recorded.
>>>>> In both cases nothing is changed in dmesg output.
>>>>> What else could i do to help you out?
>>>>>
>>>> Comparing the two dmesg logs, I'm under the impression that in the
>>>> second case (the newer kernel), the hda driver kicks in and creates a
>>>> sound device before the usb audio driver does. Hence, the default card
>>>> changes and you're recording from your internal sound card rather than
>>>> the Webcam.
>>>>
>>>> Could you please send the output of 'aplay -l' in both cases?
>>>>
>>>>
>>>> Daniel
>>>>
>>> Output of working case
>>> **** List of PLAYBACK Hardware Devices ****
>>> card 0: SB [HDA ATI SB], device 0: AD198x Analog [AD198x Analog]
>>> Â  Subdevices: 1/1
>>> Â  Subdevice #0: subdevice #0
>>> card 0: SB [HDA ATI SB], device 1: AD198x Digital [AD198x Digital]
>>> Â  Subdevices: 1/1
>>> Â  Subdevice #0: subdevice #0
>>> card 2: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
>>> Â  Subdevices: 1/1
>>> Â  Subdevice #0: subdevice #0
>> Sorry, there's of course no playback on a webcam. Try 'arecord -l'
>> instead, please.
>>
>>
>> Daniel
>>
> Output of non-working case
> **** List of CAPTURE Hardware Devices ****
> card 0: SB [HDA ATI SB], device 0: AD198x Analog [AD198x Analog]
>    Subdevices: 3/3
>    Subdevice #0: subdevice #0
>    Subdevice #1: subdevice #1
>    Subdevice #2: subdevice #2
> card 1: Webcam [Trust 2MP Auto Focus Webcam], device 0: USB Audio [USB 
> Audio]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> 
> 
> Output of working case
> **** List of CAPTURE Hardware Devices ****
> card 0: SB [HDA ATI SB], device 0: AD198x Analog [AD198x Analog]
>    Subdevices: 3/3
>    Subdevice #0: subdevice #0
>    Subdevice #1: subdevice #1
>    Subdevice #2: subdevice #2
> card 1: default [Trust 2MP Auto Focus Webcam ], device 0: USB Audio [USB 
> Audio]
>    Subdevices: 1/1
>    Subdevice #0: subdevice #0
> 

Try 'arecord -f cd -Dplughw:1 foo.wav' and see if that works. For
whatever reason, the webcam is not the default in the non-working case.
Are you using the same userspace and configs in both cases?


Daniel