Messages in this thread | | | Date | Mon, 16 Apr 2012 10:21:22 +0200 | From | Takashi Iwai <> | Subject | Re: Realtek codec eating up battery? |
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At Mon, 16 Apr 2012 08:38:13 +0900, Norbert Preining wrote: > > 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?
There should be no kernel change for such a problem.
Basically the above message means that no power-saving feature is kicked off.
Check your mixer setup whether you enabled any analog-loopback controls such as "Mic Playback" or "Line Playback" mutes. If any of these is turned on, the power-saving is suppressed.
If it still doesn't change the behavior, please give alsa-info.sh output (run with --no-upload option).
thanks,
Takashi
> 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 > ------------------------------------------------------------------------ > `You know they've reintroduced the death penalty for > insurance company directors?' > No I didn't. For what offence?' > Trillian frowned. > `What do you mean, offence?' > `I see.' > --- Evidence that there will be some justice in the Universe > --- eventually. > --- Douglas Adams, The Hitchhikers Guide to the Galaxy >
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