From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: [Intel-gfx] [PATCH 0/4 V7] Power-well API
	implementation for Haswell
Date: Wed, 24 Jul 2013 14:13:33 +0200
Message-ID: <s5hwqognok2.wl%tiwai@suse.de>
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To: David Henningsson <david.henningsson@canonical.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, "Girdwood,
 Liam R" <liam.r.girdwood@intel.com>, "daniel.vetter@ffwll.ch" <daniel.vetter@ffwll.ch>, "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>, "Wysocki,
 Rafael J" <rafael.j.wysocki@intel.com>, "Wang,
 Xingchao" <xingchao.wang@intel.com>, Paulo Zanoni <przanoni@gmail.com>, Daniel Vetter <daniel@ffwll.ch>, "Jin, Gordon" <gordon.jin@intel.com>
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At Wed, 24 Jul 2013 13:57:55 +0200,
David Henningsson wrote:
> 
> 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?

Yes, until 12.3, at least.  Since 12.3 and later, some portions have
been ported to systemd.


Takashi