Realtek codec eating up battery?

From: Norbert Preining
Date: Sun Apr 15 2012 - 19:38:23 EST


Dear all,

(please Cc)

running a recent git kernel from today, I see the following in powertop:
1.02 W 100.0% Device Audio codec hwC0D0: Realtek

I am quite sure that was not the case in former times, so I wanted to ask
if you think this is a kernel change or a user space change that is
responsible for that?

AFAIR before I was running on top of git 7c427f45, now
on git 6c23b8e9 and there have been quite some changes regarding realtek
in the meantime:
* tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Fix mem leak (and rid us of trailing whitespace).
ALSA: hda/realtek - Add quirk for Mac Pro 5,1 machines
ALSA: hda/realtek - Add a fixup entry for Acer Aspire 8940G
ALSA: hda/realtek - Fix GPIO1 setup for Acer Aspire 4930 & co
ALSA: hda/realtek - Add a few ALC882 model strings back

output of dmesg wrt realtek/hda:
[ 20.952213] snd_hda_intel 0000:00:1b.0: irq 47 for MSI/MSI-X
[ 21.004975] hda_codec: ALC262: SKU not ready 0x411111f0
[ 21.008167] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input10
[ 21.011878] input: HDA Intel Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
[ 21.013351] input: HDA Intel Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12


Thanks a lot and all the best

Norbert
------------------------------------------------------------------------
Norbert Preining preining@{jaist.ac.jp, logic.at, debian.org}
JAIST, Japan TeX Live & Debian Developer
DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094
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