3

In my laptop the sound code is running at 100% even when I am not playing anything. It is causing my palm rest to hit significantly. While I do not face the issue on windows machine where I am using the drivers for IDT. Here is the output of the powertop.

Summary: 0.0 wakeups/second, 0.0 GPU ops/second and 0.0 VFS ops/sec

            Usage       Events/s    Category       Description
        100.0%                      Device         Audio codec hwC0D0: IDT
         52.3 ms/s       0.0        Process        compiz

Is there any solution to decrease the power consumption of the sound device.

rzr
  • 425
Abhijeet
  • 1,639

3 Answers3

6

I added the following to /etc/rc.local

echo 1 | tee /sys/module/snd_hda_intel/parameters/power_save

echo Y | tee /sys/module/snd_hda_intel/parameters/power_save_controller

pkill pulseaudio

pulseaudio --start 

exit 0

And it seems to have done the trick...

penreturns
  • 5,950
jamaal speights
  • 61
1

Either the sound driver doesn't support power management or it's not enabled. I've no idea what IDT is, but you can enable power management, for example, for an Intel sound device. The older versions of PowerTop used to suggest it, but the newer one has a menu you can navigate with left/right arrow key - Tunables is the entry you want. Try navigating to that entry and see if there is anything related to the sound card that powertop can tune.

mikewhatever
  • 33,013
0

I am also affected by this issue on debian may those urls help to investigate :

https://bugs.launchpad.net/ubuntu/+source/powertop/+bug/536631

http://rzr.online.fr/q/lenovo

rzr
  • 425