On Thu, 6 Aug 2009 09:12:24 +0530 Ritesh Raj Sarraf wrote:
> Hi Randy,
>
> On Thursday 06 Aug 2009 04:52:11 Randy Dunlap wrote:
> > +void hda_power_on(void)
> > +{
> > + FILE *file;
> > +
> > + file = fopen("/sys/module/snd_hda_intel/parameters/power_save",
> > "w"); + if (!file)
> > + return;
> > + fprintf(file,"1");
> > + fclose(file);
> > + if (access("/dev/dsp", F_OK))
> > + return;
> > + file = fopen("/dev/dsp", "w");
> > + if (file) {
> > + fprintf(file,"1");
> > + fclose(file);
> > + }
> > +}
> > +
>
> What is the "/dev/dsp" stuff for ?
> Does that too save power ?
Hi,
That's certainly a good question. I just copied the powertop ac97
code and that's what it does.
Hopefully someone else here can explain...
---
~Randy
LPC 2009, Sept. 23-25, Portland, Oregon
http://linuxplumbersconf.org/2009/
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