Re: /dev/dsp busy

doug_at_safeport.com
Date: 12/28/04

  • Next message: andrei: "re:a quick question" 
    Date: Tue, 28 Dec 2004 00:51:19 -0500 (EST)
To: freebsd-questions@freebsd.org

    A suggestion from a Jan 2004 thread worked for me:

       Date: Sun, 25 Jan 2004 08:42:07 -0500 (EST)
       From: Stephen Martin <jyroscop@cotse.com>
       To: geert.hendrickx@ua.ac.be
       Cc: freebsd-questions@freebsd.org
       Subject: Re: /dev/dsp: Device busy

       Geert,

       I was having this specific problem when trying to use mplayer. What I did
       was change the "Autosuspend if idle for" setting. It can be found in
       Control Center -> Sounds & Multimedia -> Sound System -> aRTs tab (feels
       vaguely like describing a windows problem :). I set mine at 5 seconds.
       Your's will of coarse depend.

    In my case a reboot was required after changing the setting. This thread was
    describing FreeBSD 4.9 and kde 3.2. I am running 5.3R and kde 3.3.0. The /dev/dsp busy
    condition seems to occur across a number of PCs and sound cards.

    I had also added the following to /boot/device.hints:

         hint.pcm.0.at="isa"
         hint.pcm.0.irq="5"
         hint.pcm.0.drq="1"
         hint.pcm.0.flags="0x0"

    I have since removed these statements and have no evidence they had any effect. Other
    than the kde setting the only change related to sound is hw.snd.verbose=3 in
    /etc/sysctl.conf.

    On Mon, 29 Nov 2004 doug@safeport.com wrote:

    > Alas no - thank you for the suggestion. Following your lead I tried a number of
    > variations including turning ACPI off, any some other sysctl setting I found via
    > google. All with the same result.
    >
    > Next I removed load command from loader.conf and rebooted. No kde, no X server.
    > I then loaded and tried to unload the sound modules. sound.ko would not unload
    > presenting as busy. Is this a problem? It was suggested to me interrupt problem
    > at startup could cause this. I get the same result in single user mode.
    >
    > My commands:
    >
    > # kldstat
    > Id Refs Address Size Name
    > 1 7 0xc0400000 5cdad0 kernel
    > 2 14 0xc09ce000 537f0 acpi.ko
    > 3 1 0xc1675000 17000 linux.ko
    >
    > # kldload snd_maestro
    > pcm0: <ESS Technology Maestro-2E> port 0x1400-0x14ff irq 5 at device 8.0 on pci0
    >
    > pcm0: <SigmaTel STAC9721/23 AC97 Codec>
    > pcm0: [GIANT-LOCKED]
    >
    > root@mneme:~# kldunload snd_maestro
    > pcm0: detached
    > # kldunload sound
    > kldunload: attempt to unload file that was loaded by the kernel
    > kldunload: can't unload file: Device busy
    >
    >
    > On Sun, 28 Nov 2004, Jeremy Faulkner wrote:
    >
    > > doug@safeport.com wrote:
    > > > I need help in finding the reason for the /dev/dsp busy message. fstat does not
    > > > show any process using /dev/dsp.
    > > >
    > > > I am running 5.3 with xorg, kde 3.3. When KDE starts, /dev/dsp tests busy which
    > > > directs arts to /dev/null. There are no processes using /dev/dsp. I can play
    > > > CDs using either kcd or 'cdcontrol -f /dev/acd0 play 1', so I think the sound
    > > > card is setup okay.
    > > >
    > > > However something is wrong since 'cat filename > /dev/dsp' produces no sound.
    >
    > I am assuming that the above means this is not a KDE problem. Is this correct?
    >
    > > > My configuration:
    > [cut]
    > > > Thanks for any pointers.
    > > >
    > >
    > > try as root:
    > > sysctl -w hw.snd.maxautovchans=4
    > >
    > > --
    > > Jeremy Faulkner <gldisater@gldis.ca>
    > > Resume: http://www.gldis.ca/gldisater/resume.html
    > >
    >
    > _____
    > Douglas Denault
    > http://www.safeport.com
    > doug@safeport.com
    > Voice: 301-469-8766
    > Fax: 301-469-0601
    > _______________________________________________
    > freebsd-questions@freebsd.org mailing list
    > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
    > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
    >

    _____
    Douglas Denault
    http://www.safeport.com
    doug@safeport.com
    Voice: 301-469-8766
      Fax: 301-469-0601
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