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    SubjectRe:
    On 2012.09.06 at 08:48 +0200, Takashi Iwai wrote:
    > At Thu, 06 Sep 2012 08:33:30 +0200,
    > Daniel Mack wrote:
    > >
    > > On 06.09.2012 08:02, Markus Trippelsdorf wrote:
    > > > On 2012.09.04 at 16:40 +0200, Takashi Iwai wrote:
    > > >> ----------------------------------------------------------------
    > > >> Sound fixes for 3.6-rc5
    > > >>
    > > >> There are nothing scaring, contains only small fixes for HD-audio and
    > > >> USB-audio:
    > > >> - EPSS regression fix and GPIO fix for HD-audio IDT codecs
    > > >> - A series of USB-audio regression fixes that are found since 3.5 kernel
    > > >>
    > > >> ----------------------------------------------------------------
    > > >> Daniel Mack (4):
    > > >> ALSA: snd-usb: Fix URB cancellation at stream start
    > > >> ALSA: snd-usb: restore delay information
    > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    > > > The commit fbcfbf5f above causes the following lines to be printed
    > > > whenever I start a new song:
    > >
    > > Copied Pierre-Louis Bossart - he wrote the code in 294c4fb8 which this
    > > patch (fbcfbf5f) brings back now.
    > >
    > > > delay: estimated 0, actual 352
    > > > delay: estimated 353, actual 705
    > > >
    > > > (44.1 * 8 = 352.8)
    > > >
    > > > This happens with an USB-DAC that identifies itself as "C-Media USB
    > > > Headphone Set".
    > >
    > > And you didn't you see these lines with 3.4?
    >
    > Maybe the difference of start condition?
    >
    > Markus, does the patch below fix anything?

    Unfortunately no.
    However reverting the following fixes the problem:

    commit 245baf983cc39524cce39c24d01b276e6e653c9e
    Author: Daniel Mack <zonque@gmail.com>
    Date: Thu Aug 30 18:52:30 2012 +0200

    ALSA: snd-usb: fix calls to next_packet_size

    --
    Markus


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