Roland Smith wrote:
On Tue, Nov 20, 2007 at 06:50:05PM +0100, Frank Staals wrote:
I updated to RELENG_7 yesterday, but I'm noticing that the snd_ich driver quite often skips playback for a short period of time at some points. Especially when doing mysql queries. Anyone else having problems with snd_ich ?

FreeBSD 7.0-BETA3 FreeBSD 7.0-BETA3 #2: Mon Nov 19 19:50:46 CET 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/PFSERVERKERNEL amd64

[EMAIL PROTECTED] pciconf -lv
[EMAIL PROTECTED]:0:4:0: class=0x040100 card=0x71851462 chip=0x005910de rev=0xa2 hdr=0x00
   vendor     = 'Nvidia Corp'
   device     = 'Realtek ALC850 Realtek AC'97 Audio'
   class      = multimedia
   subclass   = audio

[EMAIL PROTECTED] dmesg | grep pcm
pcm0: <nVidia nForce4> port 0xea00-0xeaff,0xee00-0xeeff mem 0xfe02d000-0xfe02dfff irq 23 at device 4.0 on pci0
pcm0: [ITHREAD]
pcm0: <Avance Logic ALC850 AC97 Codec>

I've had trouble with skipping sound some time ago on machines with
another chipset;
$ cat /dev/sndstat FreeBSD Audio Driver (newpcm: 64bit 2007061600/amd64)
Installed devices:
pcm0: <VIA VT8237> at io 0xd800 irq 22 [MPSAFE] (5p:4v/1r:1v channels duplex default)

I put the following in /boot/device.hints

# Larger DMA buffer for the soundcard, for better sound quality.

This fixed the problem for me.

Ah thanks for the hint, but I'm guessing that won't work since aparently the buffersice is allready 16K :

[EMAIL PROTECTED] sysctl -a | grep pcm dev.pcm.0.%desc: nVidia nForce4
dev.pcm.0.%driver: pcm
dev.pcm.0.%location: slot=4 function=0 handle=\_SB_.PCI0.MACI
dev.pcm.0.%pnpinfo: vendor=0x10de device=0x0059 subvendor=0x1462 subdevice=0x7185 class=0x040100
dev.pcm.0.%parent: pci0
dev.pcm.0.eapd: 1 1 48000 s16le
dev.pcm.0.rec.vchans: 1
dev.pcm.0.rec.vchanrate: 48000
dev.pcm.0.rec.vchanformat: s16le
dev.pcm.0.buffersize: 16384
dev.pcm.0.ac97rate: 48000

Anyone else a hint ?

-Frank Staals

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