still audio hiccups

Ariff Abdullah ariff at FreeBSD.org
Sun May 13 13:15:44 UTC 2007


On Sun, 13 May 2007 14:28:25 +0200 (CEST)
Martin Dieringer <martin.dieringer at gmx.de> wrote:
> On Fri, 11 May 2007, Ariff Abdullah wrote:
> 
> > On Wed, 9 May 2007 03:40:35 +0200 (CEST)
> > Martin Dieringer <martin.dieringer at gmx.de> wrote:
> >> On Tue, 8 May 2007, Martin Dieringer wrote:
> >>
> >>> On Thu, 3 May 2007, Ariff Abdullah wrote:
> >>>
> >>>> On Wed, 2 May 2007 03:40:08 +0200 (CEST)
> >>>> Martin Dieringer <martin.dieringer at gmx.de> wrote:
> >>>>>
> >>>>>
> >>>>> I thought it was over when I killed powerd. But now it
> >suddenly >>>> makes "hiccup" every few seconds again.
> >>>>> This appears on the internal sound card (intel ich4) as well
> >as >> the >> USB (m-audio transit)
> >>>>> With mpd, xmms, waveplay...
> >>>>> No load, processor or disk stress.
> >>>>>
> >>>>> - Thinkpad T42p
> >>>>> - FreeBSD 6.2-STABLE #5: Thu Mar 29 16:23:53 CEST 2007
> >>>>>
> >>>>
> >>>> Please show the output of pciconf -lv | grep ^pcm
> >>>>
> >>>
> >>>
> >>> pcm0 at pci0:31:5: class=0x040100 card=0x05371014 chip=0x24c58086
> >>> rev=0x01  hdr=0x00
> >>>    vendor     = 'Intel Corporation'
> >>>    device     = '82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97
> >Audio >> Controller'
> >>>    class      = multimedia
> >>>    subclass   = audio
> >>>
> >>> # cat /dev/sndstat FreeBSD Audio Driver (newpcm)
> >>> Installed devices:
> >>> pcm0: <Intel ICH4 (82801DB)> at io 0xc0000c00, 0xc0000800 irq 11
> >>> bufsz 16384 kld snd_ich (1p/1r/0v channels duplex default)
> >>> pcm1: <USB Audio> at ? kld snd_uaudio (1p/1r/0v channels duplex)
> >>>        mode 1:(output) 2ch, 24/24bit, pcm, 48001-96000Hz
> >>>        mode 3:(output) 2ch, 16/16bit, pcm, 8000-48000Hz
> >>>        mode 1:(input) 2ch, 24/24bit, pcm, 48001-96000Hz
> >>>        mode 2:(input) 2ch, 24/24bit, pcm, 8000-48000Hz
> >>>        mode 3:(input) 2ch, 16/16bit, pcm, 8000-48000Hz
> >>
> >> I switched to ACPI now (instead of APM), but the hiccups
> >remained. >
> >> They start after either the system is running for a while (now 6
> >> hours) or music playback of some time (now about 2 hours
> >altogether) > and get worse.
> >>
> >> Shortly after a reboot everything seems ok.
> >>
> >> When I run "vmstat -w 1" they get worse, but I cannot relate them
> >> to any events..
> >>
> >
> > pcm0 or pcm1, or both? Try enabling vchans, or grab binary modules
> > from http://people.freebsd.org/~ariff/BINARY_MODULES/ . Your clock
> > issues could be the prime suspect here.
> 
> 
> setting vchans=1 does resampling of 44.1 to 48kHz, which is
> unacceptable.
> 
> I use a hacked snd_uaudio driver for the m-audio transit, so I
> suspect I cannot use your BINARY_MODULES...
> 
> I have no more clock issues since I moved to ACPI btw.
> 

Well, as I said... __try__ .

I still don't know whether your issues is with pcm0 (snd_ich) _or_
pcm1 (snd_uaudio, hacked? What kind of hack?) _or_ _both_ . If you
insist on not using (or even _trying_) the binary modules, look for
the patchset in the above directory. Disable acpi_throttle (read,
"acpi_throttle", nothing to with powerd or est or speedstep) if that
matters.



--
Ariff Abdullah
FreeBSD

... Recording in stereo is obviously too advanced
    and confusing for us idiot ***** users :P ........
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