pcm0 channel dead
eksffa at freebsdbrasil.com.br
Thu Jun 16 21:50:02 GMT 2005
Patrick Tracanelli wrote:
> Hello there.
> I tried to run a number of SIP softphones (linphone, kphone, etc), and
> just found out my problem was the mic recording device, and not the SIP
> I tried to make basic testings on recording, copying from
> /dev/audio|/dev/dsp to a file or to /dev/dsp as output. Every single
> test returns the same:
> pcm0:record:0: record interrupt timeout, channel dead
> Tried in both 5.4-S and 6.0-CURRENT (from Jun 8th). Any idea what is
> causing this? And how to fix it?
> Hardware identifying:
> (eksffa at claire-redfield)~> grep "snd\|sound" /sys/i386/conf/CLAIRE
> device sound
> device "snd_t4dwave"
> (eksffa at 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
> (eksffa at claire-redfield)~> pciconf -lv | grep -B4 audio
> pcm0 at pci0:4:0: class=0x040100 card=0x8158104d chip=0x545110b9 rev=0x02
> vendor = 'Acer Labs Incorporated (ALi)'
> device = 'ALI M5451 PCI AC-Link Controller Audio Device'
> class = multimedia
> subclass = audio
> (eksffa at claire-redfield)~> grep -i pcm /var/run/dmesg.boot
> pcm0: <Acer Labs M5451> port 0x8800-0x88ff mem 0xf0401000-0xf0401fff irq
> 11 at device 4.0 on pci0
> pcm0: <Analog Devices AD1981B AC97 Codec>
> pcm0: [GIANT-LOCKED]
> O also tried to set sc->duplex = 1 on /sys/dev/sound/pci/solo.c (around
> line 972) but it caused my output device to not work properly as it does
> when sc->duplex = 0 and the mic device still did not work anyway.
> Thanks :-)
I did some testings reading the code and trying different HZ, added some
extra info to the error message, and what I get is:
I use to have HZ set to 1000, which returns count as -8, every value for
HZ >= 1000 returns
pcm0:record:0: record interrupt timeout, channel dead (count: -8,
If I get HZ back to the common 100 value I get
pcm0:record:0: record interrupt timeout, channel dead (count: 0,
while doing doing
(eksffa at claire-redfield)~# cp /dev/audio /tmp/audio.au
/dev/audio -> /tmp/audio.au
Every other value <= 100 makes count get 0, I tried up to as low as the
system doesnt load anymore (around HZ=14).
I have no idea on what is causing the problem.
FreeBSD Brasil LTDA.
The FreeBSD pt_BR Documentation Project
patrick @ freebsdbrasil.com.br
"Long live Hanin Elias, Kim Deal!"
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