[mythtv-users] slightly OT: no sound

Nick Rout nick.rout at gmail.com
Mon Dec 15 21:41:25 UTC 2008


On Tue, Dec 16, 2008 at 10:36 AM, Mary Strimel <mary.strimel at gmail.com> wrote:
>
>
> On Mon, Dec 15, 2008 at 4:22 PM, Michael T. Dean <mtdean at thirdcontact.com>
> wrote:
>>
>> On 12/15/2008 04:11 PM, Nick Rout wrote:
>> > On Tue, Dec 16, 2008 at 8:20 AM, Mary Strimel wrote:
>> >
>> >> My myth box has been running happily for 70+ days, but now after
>> >> rebooting
>> >> there is no sound.  I don't think it's a myth-specific problem but
>> >> since my
>> >> hardware is similar to other myth users I hope someone here can help me
>> >> -
>> >> other routes have failed.
>> >>
>> >> I have onboard Via sound using Alsa's snd_via82xx driver.  I also have
>> >> a
>> >> PC-HDTV 5500 and a WinTV PVR 250 installed.
>> >>
>> >> There are two weird things I noticed after the reboot (besides the
>> >> eerie
>> >> quiet):
>> >>
>> >> 1) there no /dev/dsp device anymore.  I think myth was using /dev/dsp
>> >> for
>> >> sound; the myth setting is now defaulted to "adsp" but I have no idea
>> >> what
>> >> that is.
>> >>
>> >> 2) under xmms, sound *does* work if I select, under the ALSA output,
>> >> "hw
>> >> 1,0" but there is no sound in any other program.  Alsamixer shows the
>> >> Via
>> >> sound controller as device 1, and all channels are unmuted / top
>> >> volume.
>> >>
>> >> I am aware that people on this mailing list have solved issues with PCI
>> >> cards being recognized in a different order at boot time, but I how do
>> >> I
>> >> tell if this is actually the problem?  I don't want to be messing
>> >> around
>> >> with settings in "blind" fashion and break something else.
>> >>
>> >> Also, if I determine that it's an issue with the card order, how would
>> >> I
>> >> know which card "should" be detected first?  And why aren't any
>> >> /dev/dsp
>> >> devices being created at all?
>> >>
>> >> Any help with the ANY of the above would be much appreciated!  If it
>> >> matters, I have Ubuntu Gutsy 64.
>> > A few preliminary tests would be to run
>> >
>> > aplay -l
>> > aplay -L
>> > ls /proc/asound (I think thats the path)
>> >
>> > to see what is recognised.
>>
>> Yeah, specifically:
>>
>> cat /proc/asounds/cards
>>
>> where I think you'll find you have a sound card you don't know about
>> (perhaps the analog capture portion of the HD-5500?).  The problem is
>> that the cards get different device numbers depending on when they
>> initialize, so they could change at every boot.  You need to lock the
>> desired card to card 0.
>>
>> Mike
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
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>
> OK, I think I found on the Ubuntu forum how to force the order of the sound
> cards.  I'll give that a try and report back.  Thanks!


probably the correct way is to write some udev rules :)


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