[pulseaudio-discuss] Missing Digital outputs with hotplug Transit device

Dana Goyette dgoyette at calpoly.edu
Sun Sep 27 11:39:30 PDT 2009

Colin Guthrie wrote:
> 'Twas brillig, and Neil Wilson at 27/09/09 11:42 did gyre and gimble:
>> 2009/9/27 Colin Guthrie <gmane at colin.guthr.ie>:
>>> What version of udev do you have? You should have at least 146 but if 
>>> you
>>> are on 145 then you should apply this patch:
>>> http://cvs.fedoraproject.org/viewvc/rpms/udev/devel/0001-enumeration-move-ALSA-control-devices-to-the-end-of-.patch?revision=1.1&view=markup 
>>> (it is included in udev 146)
>>> Hope that's the problem.
>> Doesn't look like it. I'm on the edge with Ubuntu karmic, which is
>> pulseaudio 0.9.18 and udev 147 and yes it is the 'module-udev-detect'
>> that is doing the lookup.
> Well regardless of the cause, I think the symptom is still the same. 
> There is a race somewhere relating to the device permissions. It could 
> be udev or consolekit or kernel level inotify support to blame, but I 
> don't think it's pulse specifically (tho' that could very easily be 
> wrong - or it could be that this is where it needs to be worked around 
> in any case).
> Col
Hmm, I also have this same issue with my CM106-based "Audio Advantage
SRM".  It gives me tons of "no such file or directory" upon trying to
initialize audio output, and ends up as input-only.  I have attached the
ouput of "pulseaudio -vv" upon hotplugging the device.

(Interestingly enough, ALSA just plain doesn't offer digital output on
the thing -- and neither does the in-the-box Windows USB-Audio driver.
I'd imagine it needs a workaround similar to that used by the
CM112-based Xonar U1.)

Distro is Ubuntu Karmic; PulseAudio version is 0.9.18; udev version is 147.

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