[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 11:47, Kostas wrote:
> On 28/08/2012 12:30 μμ, Daniel Mack wrote:
>> On 28.08.2012 11:18, Kostas wrote:
>>> On 28/08/2012 12:06 μμ, Daniel Mack wrote:
>>>> 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
>>>>
>>> Unfortunately it doesn't work...voice is recorded only in 1.0.23 alsa
>>> version.
>>> In above version nothing is recorded.
>>> I use the same Ubuntu release just the kernel changes
>>> 1.0.23 alsa is in kernel 2.6.38
>>> newer alsa versions that don't work are in newer kernels.
>> I still think it is all related to configs and settings. Can you please
>> go check all relevant volume settings and routing switches with amixer
>> or alsamixer? The fact that the default changes tells me that
>> something's different in the behaviour in which ALSA handles the devices.
>>
>> Also note that 1.0.24 is rather ancient already, and while the driver
>> has seen quiet some refactoring lately, I haven't heard about
>> regressions in that version yet - and I'm sure we would have gotten a
>> whole lot of reports if there was such a tremendous breakage. And
>> there's no signs of errors in the kernel logs either. But you never
>> know, of course.
>>
>>
>> Daniel
>>
> Alsamixer working case http://imagebin.org/226143
> Alsamixer non-working case http://imagebin.org/226142
> 
> I also attach amixer output for both cases.
> 

Both in the images and in the text output you seem to have missed
pointing amixer/alsamixer the correct device. alsamixer is also in the
playback pane, which doesn't exist for the Webcam.

Try 'alsamixer -c1 -V capture'