Date: Tue, 16 Dec 2003 10:23:00 +0300 From: "Yan V. Batuto" <batuto@wgc.chem.pu.ru> To: Matt Loschert <loschert@servint.com>, Munish Chopra <chopra@soulwax.net> Cc: current@freebsd.org Subject: Re: 5.2-RELEASE TODO Message-ID: <200312161023.00227.batuto@wgc.chem.pu.ru> In-Reply-To: <20031216010608.E4CAC16A4D0@hub.freebsd.org> References: <20031216010608.E4CAC16A4D0@hub.freebsd.org>
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> On Mon, 15 Dec 2003, Munish Chopra wrote: > > > On 2003-12-15 14:09 +0000, Mathew Kanner wrote: > > > On Dec 15, Munish Chopra wrote: > > > > > > > > I'm not personally seeing any LOR's, but audio playback slows down under > > > > load, and every few seconds I hear popping noises during audio playback, > > > > whether under load or not. > > > > > > > > I've got a simple SB16: > > > > pcm0: <Creative CT5880-C> port 0xd800-0xd83f irq 5 at device 15.0 on > > > > pci0 > > > > pcm0: <TriTech TR28602 AC97 Codec> > > > > > > Hello Munish, > > > I would realy like to help you and others. Please describe in > > > detail the circumstances that create the problem. Are you > > > experiencing buffer overruns or underruns? How many devices are > > > sharing the IRQ? What are they? What happens when you cat a raw file > > > to the device? Does this happen with VCHANs? Have you tried the patch > > > I posted to -current under the heading "sound patch for pop & > > > crackles"? > > > Please read the pcm man page for a better description on how > > > the answer the above. > > > > > > > There are two distinct problems in my case: > > > > 1) Load can be virtually zero, moderate, or heavy, either way every few > > seconds (anywhere between 2 and 10 seconds or so) I hear snaps or > > pops in the output. Some are pretty hard to hear, others are obvious, > > depending on what's actually playing. > > > > 2) When untarring large gzip'ed or bzip2'ed tarballs, playback begins to > > "slow down" to something like half the normal speed or less. I first > > noticed this during portupgrade, when the XFree86 tarballs are > > unpacked. > > FWIW, I have been seeing the same thing (problem 2) while running xmms and > portupgrade on 4.9-STABLE. This particular problem is definitely not > confined to -CURRENT. Just my $0.02: Problem #1 is not confined to -CURRENT too. I hear crackles in the output sound on my old pentium running 4.9-stable. And soundcard there is "simple SB16" too -- ISA CL4135 (afair). (Sorry, I can't reach it in the moment to get full dmesg.) It looks like crackles occurs during disk activity -- they sounds exactly synchronously with IDE LED blinking. I tried to switch vchans on and off, but without any audible changes. I'll try the patch mentioned within the few days. I can post more detailed informaion about hardware if it can be helpful later. Best regards! Yan.
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