From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hans de Goede <hdegoede@redhat.com>
Subject: Changing snd_hda_intel.power_save default value ?
Date: Wed, 1 Nov 2017 15:19:44 +0100
Message-ID: <9247bda8-da84-81e0-7897-8a45008c0d10@redhat.com>
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To: Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>, Vinod Koul <vinod.koul@intel.com>, alsa-devel@alsa-project.org
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Hi All,

I'm working on trying to improve the OOTB power-consumption
of Linux (Fedora Workstation) on laptops.

One of the easy wins here is setting snd_hda_intel.power_save=1

I see that the default is configurable through a Kconfig option,
currently Fedora is using the Kconfig default value of 0.

So I'm wondering if there any known issues with changing the
default to 1 ?

I was also thinking that maybe an automatic value
(SND_HDA_POWER_SAVE_DEFAULT == -1) might be a good idea,
which would mean 0 normally except for PCI-ids which are
markes with a MOBILE flag in their driver_data in
the azx_ids pci_device_id table ?

Regards,

Hans