still audio hiccups

[Martin Dieringer]

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.

m.