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From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
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>,
	Takashi Iwai <tiwai@suse.de>,
	"daniel.vetter@ffwll.ch" <daniel.vetter@ffwll.ch>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	"Wang, Xingchao" <xingchao.wang@intel.com>,
	Paulo Zanoni <przanoni@gmail.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	"Jin, Gordon" <gordon.jin@intel.com>
Subject: Re: [Intel-gfx] [PATCH 0/4 V7] Power-well API implementation for Haswell
Date: Wed, 24 Jul 2013 15:14:31 +0200	[thread overview]
Message-ID: <51EFD337.1060301@intel.com> (raw)
In-Reply-To: <51EFC143.2090603@canonical.com>

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

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  parent reply	other threads:[~2013-07-24 13:14 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-30 14:07 [PATCH 0/4 V7] Power-well API implementation for Haswell Wang Xingchao
2013-05-30 14:07 ` [PATCH 1/4 V7] ALSA: hda - Fix runtime PM check Wang Xingchao
2013-05-30 14:07 ` [PATCH 2/4] ALSA: hda - Move azx_first_init() into azx_probe_continue() Wang Xingchao
2013-05-30 14:07 ` [PATCH 3/4 V7] ALSA: hda - Add power-welll support for haswell HDA Wang Xingchao
2013-05-30 14:07 ` [PATCH 4/4 V7] i915/drm: Add private api for power well usage Wang Xingchao
2013-06-06 15:34 ` [PATCH 0/4 V7] Power-well API implementation for Haswell Daniel Vetter
2013-07-03 20:00   ` Paulo Zanoni
2013-07-04  8:23     ` Wang xingchao
2013-07-04 13:24       ` Paulo Zanoni
2013-07-04 13:13         ` [Intel-gfx] " Wang xingchao
2013-07-05 21:19           ` Paulo Zanoni
2013-07-06  6:20             ` [Intel-gfx] " Takashi Iwai
2013-07-07 23:59               ` Wang xingchao
2013-07-08  8:07                 ` Takashi Iwai
2013-07-17  2:52               ` [Intel-gfx] " Wang, Xingchao
2013-07-17  7:34                 ` [alsa-devel] " Takashi Iwai
2013-07-17  8:03                   ` [Intel-gfx] " Wang, Xingchao
2013-07-17  8:18                     ` Takashi Iwai
2013-07-17  8:25                       ` Wang, Xingchao
2013-07-17 13:31                         ` [alsa-devel] " Paulo Zanoni
2013-07-17 14:00                           ` [Intel-gfx] " Takashi Iwai
2013-07-17 14:05                             ` David Henningsson
2013-07-17 14:21                               ` [alsa-devel] " Takashi Iwai
2013-07-17 23:17                                 ` [Intel-gfx] " Wang, Xingchao
2013-07-18  1:00                                 ` Wang, Xingchao
2013-07-18  6:44                                   ` Daniel Vetter
2013-07-18  9:23                                     ` [alsa-devel] " Wang, Xingchao
2013-07-18  9:34                                       ` Takashi Iwai
2013-07-24 10:31                                         ` [Intel-gfx] " Wang, Xingchao
2013-07-24 11:02                                           ` [alsa-devel] " Takashi Iwai
2013-07-24 11:33                                             ` [Intel-gfx] " Wang, Xingchao
2013-07-24 11:57                                               ` [alsa-devel] " David Henningsson
2013-07-24 12:13                                                 ` [Intel-gfx] " Takashi Iwai
2013-07-24 13:14                                                 ` Rafael J. Wysocki [this message]
2013-07-24 13:30                                                   ` Wang, Xingchao
2013-07-24 13:42                                                     ` Takashi Iwai
2013-07-24 13:46                                                       ` Wang, Xingchao
2013-07-24 14:00                                                       ` Wang, Xingchao
2013-07-25  6:50                                                         ` [alsa-devel] " Wang, Xingchao
2013-07-24 14:36                                                       ` [Intel-gfx] " Wang, Xingchao
2013-07-18  6:54                                   ` [alsa-devel] " Takashi Iwai

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