[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 10:47, 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