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    Subjectre: PROBLEM: snd_intel_hda audio regression in 2.6.36-rc5
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    On Wed, Sep 22, 2010 at 12:31 PM, Takashi Iwai <tiwai@suse.de> wrote:
    >
    > At Tue, 21 Sep 2010 20:32:54 +0300,
    > Aki Parviainen wrote:
    > >
    > > I've noticed an audio related problem in 2.6.36-rc5: when using 2.6.36-rc5 kernel
    > > I don't get normal two channel PCM audio at all on my machine, however multichannel audio
    > > works just fine.
    >
    > What does this mean exactly?  Could you show your test method?
    >

    Thank you for your answer and sorry for being unclear! This means that
    whenever I try to output regular stereo audio from files or DVB for
    example I cannot hear anything at all with 2.6.36-rcX kernels. Before
    2.6.36-rcX kernels normal stereo audio works just fine. However with
    2.6.36-rcX kernels and all the previous kernels digital preencoded
    (like Dolby Digital, DTS) audio works just fine. I am using Kaffeine
    1.0 and VLC 1.1 (both from Debian unstable) to play audio, both
    programs work exactly the same. My test method is basicly this:
    -boot with 2.6.36-rc4 or 2.6.36-rc5
    -open kaffeine or vlc
    -start playing mp3 file -> nothing comes to the amplifier
    -start playing mkv file with 5.1 track -> correct audio comes to the amplifier


    >
    > > I'm using snd_hda_intel and I've configured ALSA to send all
    > > audio to spdif output. With earlier kernel versions this kind of setup works
    > > just fine but with 2.6.36-rc5 only audio that works is digital preencoded audio (5.1 dolby digital from
    > > dvd:s / mkv:s) works. There's no errors or anything but nothing comes to my
    > > amplifier. I've also tested 2.6.36-rc4 and it has the same problem, in the past I've never had any audio problems with mainline kernels.
    >
    > Which kernel did it work?

    2.6.35.5 and every earlier kernel tested. Unfortunately the first
    2.6.36 based kernel that I tested was 2.6.36-rc4 and there audio
    doesn't work anymore.

    >
    > > Booting with earlier kernel solves the problem immediately.
    >
    > Run alsa-info.sh (with --no-upload option) on both working and
    > non-working kernel, and attach two files for compare.  This will give
    > a more clear sight what is different between them.
    >

    Here's the alsa-info files attached from 2.6.35.5 (works) and
    2.6.36-rc5 (doesn't work).

    Yours,

    Aki
    [unhandled content-type:application/octet-stream][unhandled content-type:application/octet-stream]
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