[mythtv-users] Occasional missing audio from recordings

[Doug Scoular]

Hi All,
    I have a Shuttle SB61G2 with a Hauppauge PVR-350 and
    NVidia GeForce 4 440MX for TV-out. I'm using gentoo 1.4
    with a 2.4.21 kernel and the latest IVTV drivers/firmware
    and MythTV 0.12.

    MythTV works wonderfully well on the above setup with
    one remaining issue.

    Occasionally I get no audio on a scheduled recording. This
    has been the case on MythTV 0.11 and 0.12. Most of
    the time the loss of audio on a scheduled recording causes
    live TV to also lose audio, however this is not always the
    case. Sometimes the loss of audio is limited to the
    one scheduled recording, subsequent recordings being
    fine and live tv unaffected.

    If I lose audio on live tv I can fix it by killing mythbackend
    and restarting it. This always fixes the problem... which indicates
    that the IVTV driver has no problem re-initialising.

    I had thought this might be due to some KDE app holding
    open the dsp device but I've disabled all arts binaries
    by making them non-executable. I've also tried running
    under twm, but all to no avail. There's nothing in the
    mythbackend logs to indicate a problem.

    I haven't seen anyone else mention this problem on the
    list so I'm stumped.

    I do get about less than a second of white noise at
    the start of playback on these "no audio" recordings.

    Any ideas much appreciated...

    Doug