Messages in this thread | | | Date | Thu, 15 May 2008 18:36:29 +0200 | From | Takashi Iwai <> | Subject | Re: [Bug #10679] 2.6.26-rc1 regression: e5e1d3cb20034a3cbcfff1f0bae12201aa2ce17e breaks artsd |
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At Thu, 15 May 2008 09:06:54 -0400, Theodore Tso wrote: > > On Thu, May 15, 2008 at 07:41:06AM +0200, Takashi Iwai wrote: > > Sounds reasonable. To where should it be added, BTW? > > Little people seem to care about Kconfig help texts, and an extra > > comment block (with depends on SND_PCSP) could be annoying... > > That's a good question. A note that including including this module > could potentially cause sound cards to be renumbered might be > reasonable, since I suspect most users (and most application > programs!) have been accustomed to only having one sound card, and so > building this module may cause sound cards to be renumbered in Kconfig > would at least be a start.
Yes.
> I know this wouldn't help users of distro kernels, but this would at > least be one way of warning distro maintainers to think twice about > enabling it as a module.
Well, yeah, for distro kernels, it's then a problem of distributors :)
> BTW, what *is* the utility of this card, and > how do you use it? I haven't been able to figure out how to use it do > anything entertaining at all. Any attempts to use it on my system > just lead to various confusing error messages.
It looks like a problem in the recent alsa-lib. This driver works fine without dmix, e.g. "aplay -Dplughw:1 foo.wav" works. I'll investigate later.
> Also, BTW, it might be nice to remove the following hunk of text from > drivers/sound/Kconfig: > > I'm told that even without a sound card, you can make your computer > say more than an occasional beep, by programming the PC speaker. > Kernel patches and supporting utilities to do that are in the pcsp > package, available at <ftp://ftp.infradead.org/pub/pcsp/>. > > What's there at the above URL is for the 2.2 and 2.4 kernels, and the > utilities at pcsnd-kit.tar.gz don't work (and didn't compile until I > futzed with them slightly).
OK, I'll clean it up, too.
> So I'm still rather puzzled how to make the snd-pcsp actually do > anything useful, unless it simply doesn't work on my Thinkpad. (Is it > normal that the sound volume levels reported by alsamixer can be muted > or unmounted, but always report 0, and can't be adjusted up?)
It can be adjusted via alsa-lib softvol plugin. That is, the volume attenuation is done in the user-space, not in the driver.
thanks,
Takashi
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