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

Wed Aug 29 00:09:23 CEST 2012

On 28/08/2012 12:55 μμ, Daniel Mack wrote:
> 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 Î¼Î¼, Daniel Mack wrote:
>>>>> On 28.08.2012 10:56, Kostas wrote:
>>>>>> On 28/08/2012 11:50 Ï€Î¼, Daniel Mack wrote:
>>>>>>> On 28.08.2012 10:47, Kostas wrote:
>>>>>>>> On 28/08/2012 08:44 ÃÂ€ÃŽÂ¼, Daniel Mack wrote:
>>>>>>>>> On 28.08.2012 00:19, Kostas wrote:
>>>>>>>>>> On 27/08/2012 06:54 ÃŽÂ¼ÃŽÂ¼, Kostas wrote:
>>>>>>>>>>> On 27/08/2012 02:44 ÃŽÂ¼ÃŽÂ¼, Daniel Mack wrote:
>>>>>>>>>>>> On 27.08.2012 12:33, Kostas wrote:
>>>>>>>>>>>>> On 27/08/2012 12:26 ÃŽÂ¼ÃŽÂ¼, 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]
>>>>>>>> Ã‚  Subdevices: 1/1
>>>>>>>> Ã‚  Subdevice #0: subdevice #0
>>>>>>>> card 0: SB [HDA ATI SB], device 1: AD198x Digital [AD198x Digital]
>>>>>>>> Ã‚  Subdevices: 1/1
>>>>>>>> Ã‚  Subdevice #0: subdevice #0
>>>>>>>> card 2: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
>>>>>>>> Ã‚  Subdevices: 1/1
>>>>>>>> Ã‚  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'
>
working http://imagebin.org/226212
non working http://imagebin.org/226214

Looks the same to me...except dB gain
I can't figure out how to point amixer to Webcam.