Date: Tue, 14 Aug 2007 00:15:08 -0700 From: "Peter Johnson" <johnson.peter@gmail.com> To: "Peter Johnson" <johnson.peter@gmail.com>, "Ariff Abdullah" <ariff@freebsd.org>, freebsd-multimedia@freebsd.org Subject: Re: HDA STAC9205 Message-ID: <1233f1b60708140015h4290c0ban4699dc0f6a9143a1@mail.gmail.com> In-Reply-To: <20070813194022.GE1463@roadrunner.spoerlein.net> References: <1233f1b60708052316r4943e5bbi29b1f194ab271019@mail.gmail.com> <20070806160331.4f0cce1d.ariff@FreeBSD.org> <1233f1b60708121140s324153c3sd6e39bf3b8c2a8a2@mail.gmail.com> <20070813194022.GE1463@roadrunner.spoerlein.net>
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On 8/13/07, Ulrich Spoerlein <uspoerlein@gmail.com> wrote: > On Sun, 12.08.2007 at 11:40:23 -0700, Peter Johnson wrote: > > - More problematic, the sound sounds like it's from a tape recorder > > with low battery: it speeds up and slows down, seemingly randomly, > > with a period of seconds. Makes for bad-sounding music playback at > > least. This is a laptop, so I suspected powerd, but even disabling > > powerd didn't seem to help. Is there a buffering setting I should be > > looking at changing? > > Perhaps something else is throttling? Try running some shell loops in > the background, like this: while :;do :;done On trying this again, stopping powerd seems to fix it after all, although the shell loop approach with powerd enabled also works. I do also have semi-random sound clicking with either approach and doing something like holding pagedown in firefox on a very long page, but this is probably unrelated. The core issue is that it appears cpu freq changing is interfering poorly with hda. Is this an insurmountable issue? How might we go about fixing it? (Yes, I'm willing to lend a hand). Cheers, Peter
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