Re: [alsa-devel] [Intel-gfx] [PATCH 0/4 V7] Power-well API implementation for Haswell

On 07/24/2013 01:33 PM, Wang, Xingchao wrote:

Yes, I agree. I'm debugging this issue on Ubuntu, not sure it happens on other distribution too. If it's related to Ubuntu, maybe need check Ubuntu power policy. Does anyone know the Ubuntu power-policy on laptop? i.e. when charger connected, will Ubuntu make decision to disable power-save feature for audio subsystem?

I'm not a power management expert, but I got a pointer from my team mate to pm-utils:

http://cgit.freedesktop.org/pm-utils/tree/pm/power.d/intel-audio-powersave

If I understand correctly, The scripts in power.d are executed when battery / AC-power is changed.

Takashi, does SUSE also use pm-utils?