lkml.org 
[lkml]   [2010]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [REGRESSION bisected] Sound goes too fast due to commit 7b3a177b0
    On 14/04/10 08:08, Takashi Iwai wrote:
    > At Tue, 13 Apr 2010 23:54:26 +0200,
    > Éric Piel wrote:
    >>
    >> Hello,
    >>
    >> Since 2.6.34-rc*, I have a regression on alsa which prevents the sound
    >> to be played correctly. When playing, the music goes too fast, skipping
    >> some parts. Typically, it's very easy to reproduce by doing:
    >> time mplayer -endpos 30 sound-file-which-lasts-more-than-thirty-sec.mp3
    >>
    >> If the wall clock is less than 30s, you have the bug. With my intel-hda
    >> (AD1981), it's reliably reproducible: it gives ~27s, instead of the
    >> normal ~31s.
    >>
    >> After bisection, it turns out that it is commit
    >> 7b3a177b0d4f92b3431b8dca777313a07533a710, aka "ALSA: pcm_lib: fix
    >> "something must be really wrong" condition" which caused this
    >> regression. Reverting it on top of 2.6.34-rc3+ fixes the problem.
    >
    > What happens if you pass position_fix=1 option to snd-hda-intel?
    Oh! Very good remark...
    I've just noticed that I had an option already on the module:
    bdl_pos_adj=0. It seems it's not needed anymore to get my card working
    fine. If I remove every option (leaving bdl_pos_adj to the default value
    1), it works fine. If I put bdl_pos_adj=0 and position_fix=1, it works
    fine again.

    I don't fully grasp the meaning of bdl_pos_adj, so I don't know if it's
    a bug to not play correctly when forcing it to 0. Is it?

    I'll ask to another reporter who had the same problem if bdl_pos_adj is
    also set to 0...

    > Is it via PulseAudio or other backend?
    This happens both with pulseaudio, oss and alsa (in which case it plays
    the 30s clip in 12s).

    Eric
    --
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2010-04-14 13:25    [W:0.023 / U:64.216 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site