Date: Tue, 16 Nov 2004 10:34:27 -0600 From: "Rick C. Petty" <rick@megan.kiwi-computer.com> To: freebsd-multimedia@freebsd.org Subject: XMMS & other sound troubles with 5.3-RELEASE Message-ID: <20041116163427.GA62374@megan.kiwi-computer.com>
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I am having troubles with 5.3's sound drivers. Once in awhile I'll have popping noises when some programs are using sound, although I have been unable to repeat anything reliabliy. However, I can repeatably lock up XMMS (and thus holding /dev/dsp open, preventing others from playing sound) if I (1) pause playback and then (2) hit stop. I'm using the built-in OSS driver (1.2.10 libOSS.so) with no other plugins enabled. Under heavy load, music skips significantly. I've tried messing with hw.snd.targetirqrate, but that didn't seem to help. What's very strange is that I am using the exact same setup as I was under 5.1-p19, same config files (incl. the kernel config). I was expecting a smooth transition, but it seems like sound is being problematic for me. I've also noticed audio lag in certain programs (notorious ones such as linux-flashplugin*, others under the linux ABI, and many games). This was a problem back in 5.1, but since I'm emailing I thought I'd ask a related question: How would one go about fixing this audio lag? I've tried tuning hw.snd.targetirqrate up to 256 but that just makes xmms skip more often and doesn't fix the lag in other programs. I've even gone through the effort of changing buffer sizes, etc. and recompiling the laggy programs, but many programs still are about 0.3-1.0 seconds behind (ave: 0.5s). Take games/heretic for instance.. Back in the 5.0-RELEASE timeframe, there was zero audio lag, and around 5.1 to 5.2.1 sound was completely broken.. now with 5.3-R it's lagging 0.5s on the default build. Any suggestions??? I did not install the xmms package(s) but built everything from scratch. I doubt there's anything strange in my kernel config, since it's mostly GENERIC with items removed that exist as KLDs... # uname -a FreeBSD kayla.kiwi-computer.com 5.3-RELEASE FreeBSD 5.3-RELEASE #3: Sun Nov 14 17:43:28 EST 2004 root@kayla.kiwi-computer.com:/usr/src/sys/i386/compile/KAYLA i386 # kldstat Id Refs Address Size Name 1 58 0xc0400000 3061d8 kernel ... 6 2 0xc074e000 1d4fc sound.ko 7 1 0xc076c000 5844 snd_ich.ko # sysctl -a | grep snd hw.snd.targetirqrate: 32 hw.snd.report_soft_formats: 1 hw.snd.verbose: 2 hw.snd.unit: 0 hw.snd.maxautovchans: 0 hw.snd.pcm0.buffersize: 16384 hw.snd.pcm0.vchans: 0 hw.snd.pcm0.ac97rate: 48000 # cat /dev/sndstat FreeBSD Audio Driver (newpcm) Installed devices: pcm0: <nVidia nForce2> at io 0xd000, 0xd400 irq 21 bufsz 16384 kld snd_ich (1p/1r/0v channels duplex default) [pcm0:play:0]: spd 44100, fmt 0x10000010, flags 0x00003030, 0x00000000, pid 76910 interrupts 3655, underruns 0, ready 131072 {userland} -> feeder_root(0x10000010) -> {hardware} [pcm0:record:0]: spd 8000, fmt 0x00000008/0x10000010, flags 0x00004000, 0x00000000 interrupts 0, overruns 0, hfree 16384, sfree 131072 {hardware} -> feeder_root(0x10000010) -> feeder_sign16le(0x10000010 -> 0x10000080) -> feeder_stereotomono16(0x10000080 -> 0x00000080) -> feeder_16leto8(0x00000080 -> 0x00000008) -> {userland} -- Rick C. Petty
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