[alsa-devel] [PATCH v2] USB-Audio: Blacklist iec958 for some USB devices

[David Henningsson]

On 03/09/2012 12:52 PM, Raymond Yau wrote:
> 2012/3/9, Takashi Iwai<tiwai at suse.de>:
>> At Fri,  9 Mar 2012 11:46:06 +0100,
>> David Henningsson wrote:
>>>
>>> Some common USB devices are analog only, so prevent the digital
>>> devices from being opened. This simplifies probing the device
>>> in PulseAudio.
>>>
>>> I have a "Logitech USB Headset" myself, the "Logitech Web Camera"
>>> was reported by Raymond Yau, and the "Blue Snowball" was reported by
>>> Andy Whitcroft.
>>>
>>> Cc: Andy Whitcroft<andy.whitcroft at canonical.com>
>>> Cc: Raymond Yau<superquad.vortex2 at gmail.com>
>>> BugLink: https://bugs.launchpad.net/bugs/940145
>>> Signed-off-by: David Henningsson<david.henningsson at canonical.com>
>>
>> Thanks, applied now.
>>
>>
>> Takashi
>>
>>> ---
>>>   src/conf/cards/USB-Audio.conf |    5 +++++
>>>   1 files changed, 5 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/src/conf/cards/USB-Audio.conf b/src/conf/cards/USB-Audio.conf
>>> index 0726c34..d7c121e 100644
>>> --- a/src/conf/cards/USB-Audio.conf
>>> +++ b/src/conf/cards/USB-Audio.conf
>>> @@ -36,6 +36,11 @@ USB-Audio.pcm.surround40_type {
>>>   # number for the iec958 device can be changed here.
>>>   USB-Audio.pcm.iec958_device {
>>>   	# "NoiseBlaster 3000" 42
>>> +
>>> +	# The below don't have digital in/out, so prevent them from being
>>> opened.
>>> +	"Logitech USB Headset" 999
>>> +	"Logitech Web Camera" 999
>>> +	"Blue Snowball" 999
>>>   }
>>>
>
> How do the blacklist work ? since there is no "Logitect Web Camera" in
> lsusb info
>
> My  QuickCam Communicate Deluxe only support mono, so it is unlikely
> for pulseaudio to open for digital capture

Sorry, maybe I misunderstood you then - could you give me the contents 
of "/proc/asound/cards" please?



-- 
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic