From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [Intel-gfx] [PATCH 0/4 V7] Power-well API implementation for Haswell Date: Wed, 24 Jul 2013 15:14:31 +0200 Message-ID: <51EFD337.1060301@intel.com> References: <46B810F6945F7C4788E11DCE57EC48901184D8BF@SHSMSX104.ccr.corp.intel.com> <46B810F6945F7C4788E11DCE57EC48901184DB13@SHSMSX104.ccr.corp.intel.com> <46B810F6945F7C4788E11DCE57EC48901184DB3D@SHSMSX104.ccr.corp.intel.com> <51E6A4B7.7060605@canonical.com> <46B810F6945F7C4788E11DCE57EC48901184E3B6@SHSMSX104.ccr.corp.intel.com> <20130718064415.GH4550@phenom.ffwll.local> <46B810F6945F7C4788E11DCE57EC48901184E58D@SHSMSX104.ccr.corp.intel.com> <46B810F6945F7C4788E11DCE57EC489011851134@SHSMSX104.ccr.corp.intel.com> <46B810F6945F7C4788E11DCE57EC4890118511BE@SHSMSX104.ccr.corp.intel.com> <51EFC143.2090603@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by alsa0.perex.cz (Postfix) with ESMTP id B9720265336 for ; Wed, 24 Jul 2013 15:14:36 +0200 (CEST) In-Reply-To: <51EFC143.2090603@canonical.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: David Henningsson Cc: "alsa-devel@alsa-project.org" , "Girdwood, Liam R" , Takashi Iwai , "daniel.vetter@ffwll.ch" , "intel-gfx@lists.freedesktop.org" , "Wang, Xingchao" , Paulo Zanoni , Daniel Vetter , "Jin, Gordon" List-Id: alsa-devel@alsa-project.org On 7/24/2013 1:57 PM, 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. > To me, this sounds like a user space issue. It requested power on and the kernel delivered. Trying to modify the kernel to work around that would be insane. Thanks, Rafael --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. z siedziba w Gdansku ul. Slowackiego 173 80-298 Gdansk Sad Rejonowy Gdansk Polnoc w Gdansku, VII Wydzial Gospodarczy Krajowego Rejestru Sadowego, numer KRS 101882 NIP 957-07-52-316 Kapital zakladowy 200.000 zl This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.