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    SubjectRe: 2.6.36: Sound stop working
    At Thu, 12 Aug 2010 23:01:04 +0200,
    Jiri Slaby wrote:
    >
    > On 08/12/2010 10:26 PM, Takashi Iwai wrote:
    > > At Thu, 12 Aug 2010 23:10:15 +0300,
    > > Pekka Enberg wrote:
    > >>
    > >> On Thu, Aug 12, 2010 at 11:00 PM, Thomas Meyer <thomas@m3y3r.de> wrote:
    > >>> My sound card stop to work since a few commits. I tried to bisect it and ended up with this:
    > >>>
    > >>> There are only 'skip'ped commits left to test.
    > >>> The first bad commit could be any of:
    > >>> 3bcf3860a4ff9bbc522820b4b765e65e4deceb3e
    > >>> c1e5c954020e123d30b4abf4038ce501861bcf9f
    > >>> We cannot bisect more!
    > >>>
    > >>> any ideas what to do now?
    > >>
    > >> Takashi, maybe this is related to Linus' problem?
    > >
    > > Yeah, I guess so, since I couldn't see any obvious problem in sound/*.
    > >
    > > PulseAudio uses inotify in udev-detection module, at least.
    > > It's possible that inotify change may hit the sound in the end.
    >
    > Probably I got into this problem yesterday. Found out that PA fails to
    > open /dev/snd/pcmC0D0p _second_ time. It opens it, then closes, then
    > opens it again and gets EBUSY. aplay is OK.

    Yes, I can also confirm that it's broken on my machine in the same
    way now :) PA log shows that the succeeding open failed.

    PA tries to do quick open/close of the same device to figure out which
    configuration is available at start-up. This implies that the
    fs/notify commits touching the open/close stuff can be the culprit.


    thanks,

    Takashi


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