Date: Fri, 17 Jun 2005 16:22:37 +0900 From: Pyun YongHyeon <yongari@rndsoft.co.kr> To: Patrick Tracanelli <eksffa@freebsdbrasil.com.br> Cc: freebsd-multimedia@freebsd.org Subject: Re: pcm0 channel dead Message-ID: <20050617072237.GC17221@rndsoft.co.kr> In-Reply-To: <42B1C276.5070900@freebsdbrasil.com.br> References: <42B1BF4F.6020501@freebsdbrasil.com.br> <20050616181220.GE9461@cnd.mcgill.ca> <42B1C276.5070900@freebsdbrasil.com.br>
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On Thu, Jun 16, 2005 at 03:18:30PM -0300, Patrick Tracanelli wrote:
>
> > Hi,
> > I guess what you are saying is the your device is half-duplex.
> >
> > Please do a
> > sysctl hw.snd.verbose=3
> > cat /dev/sndstat
> >
> > --Mat
>
> Here is the output
>
> (eksffa@claire-redfield)~# sysctl hw.snd.verbose=3
> hw.snd.verbose: 1 -> 3
> (eksffa@claire-redfield)~# cat /dev/sndstat
> FreeBSD Audio Driver (newpcm)
> Installed devices:
> pcm0: <Acer Labs M5451> at io 0x8800 irq 11 (4p/1r/0v channels duplex
> default)
> [pcm0:record:0]: spd 8000, fmt 0x00000001/0x00000008, flags
> 0x00000000, 0x000000
> 00
> interrupts 0, overruns 0, hfree 256, sfree 131072
> {hardware} -> feeder_root(0x00000008) ->
> feeder_u8toulaw(0x00000008 -> 0x0000000
> 1) -> {userland}
Hmm, I think capture mode works ok.
> [pcm0:play:0]: spd 44100/44097, fmt 0x10000010, flags
> 0x00003030, 0x00000000, pi
> d 657
> interrupts 5793, underruns 2, ready 131072
^^^^^^^^^^^
This is error condition, playback channel 0 has DMA underruns.
> {userland} -> feeder_root(0x10000010) -> {hardware}
> [pcm0:play:1]: spd 22050/22042, fmt 0x10000010, flags
> 0x00000000, 0x00000000
> interrupts 0, underruns 0, ready 0
> {userland} -> feeder_root(0x10000010) -> {hardware}
> [pcm0:play:2]: spd 0, fmt 0x00000000/0x00000008, flags
> 0x00000000, 0x00000000
> interrupts 0, underruns 0, ready 0
> {userland} -> feeder_root(0x00000000) -> {hardware}
> [pcm0:play:3]: spd 0, fmt 0x00000000/0x00000008, flags
> 0x00000000, 0x00000000
> interrupts 0, underruns 0, ready 0
> {userland} -> feeder_root(0x00000000) -> {hardware}
What I can't understand is why other playback channel(channel1,
channel 2) is active, though not triggered to play. Normally you
will use one capture/playback channel.
I have no idea how you can see "capture channel dead" as the
above output indicates playback problem.
--
Regards,
Pyun YongHyeon
http://www.kr.freebsd.org/~yongari | yongari@freebsd.org
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