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

[Kostas]

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]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 1: AD198x Digital [AD198x Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Output of non-working case (newer kernel)
**** List of PLAYBACK Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
card 0: SB [HDA ATI SB], device 1: AD198x Digital [AD198x Digital]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
card 2: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
   Subdevices: 1/1
   Subdevice #0: subdevice #0

In a greek forum where i also submitted my problem a user noticed that 
in newer kernel in alsa info there is the below text
card 1: Webcam [Trust 2MP Auto Focus Webcam], device 0: USB Audio [USB 
Audio]
Subdevices:0/1

In alsa 1.0.23 alsa-info gave
card 1: Webcam [Trust 2MP Auto Focus Webcam], device 0: USB Audio [USB 
Audio]
Subdevices:1/1

I don't know if that helps.