Bad sound with AC97 and AMD 64 X2 (Gigabyte K8N Pro SLI)

From: Dan Hensley (dan_at_dshensley.com)
Date: 10/22/05

  • Next message: Andy Green: "Re: Bad sound with AC97 and AMD 64 X2 (Gigabyte K8N Pro SLI)" 
    To: fedora-list@redhat.com
Date: Sat, 22 Oct 2005 13:05:16 -0600

    I just built a new system using the components in my subject line. The
    motherboard has built-in sound chip using the ALC850 CODEC. I also have
    an nVidia 6600GT.

    Installation of FC4 x86_64 went fine, and all my hardware was auto
    detected. However, I noticed some strange behavior. When the CPU was
    busy, either with compiling something or running up2date (there have
    been a LOT of updates since the distro was released), several things
    happened. My keyboard was acting up--one keypress would produce several
    characters, making typing impossible. And my clock would gain lots of
    time--up to 10-15 extra minutes in a 30 minute period. I also noticed
    that my sound was pretty bad--Wesnoth music was choppy, and sound
    effects were delayed and some didn't play. I looked at dmesg and saw a
    message saying something to the effect of a driver hogging interrupts or
    an "instable (sic)" clock source. I'm using NTP for my clock sync.

    So I disabled AC97 in the bios, and these issues went away. I
    re-enabled it, and my video settings went back to default for some
    reason (editing xorg.conf fixed this). Now sound is still pretty bad,
    and my clock is still gaining time, but I haven't gotten the hogging
    interrupts message again.

    I also noticed another message from dmesg:

    application mixer_applet2 uses obsolete OSS audio interface

    Does anyone have any idea what's going on? Is this a motherboard
    problem? BIOS? kernel? audio driver? Any suggestions on how to fix
    this?

    Thanks,
    Dan 

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