Randy Dunlap wrote:
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...
the timer change for power mgmt only kicks in after the device is closed.
which we force by open + close action.
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