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sl70
Guru
Joined: 18 Jun 2002
Posts: 459
Location: Saitama, JP
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 Posted: Fri Jul 04, 2003 11:46 pm Post subject: how to reset a device? |
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I found that I had no sound all of a sudden. Sending a sound file to /dev/dsp gave me the message that the device was busy. I did lsof on the device and found that gtv was using it. I killed gtv (it wasn't really running but it wasn't dead either), but I still got /dev/dsp busy messages.
The question is, how do I reset the /dev/dsp device short of rebooting (which is what I did)?
Thanks. |
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ctford0
l33t
Joined: 25 Oct 2002
Posts: 774
Location: Lexington, KY,USA
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| Posted: Sat Jul 05, 2003 12:33 am Post subject: |
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One way is to rmmod and unload the module that is controlling your sound, but this requires that you have your sound compiled in the kernel as a module.
Chris |
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sl70
Guru
Joined: 18 Jun 2002
Posts: 459
Location: Saitama, JP
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| Posted: Sat Jul 05, 2003 4:14 pm Post subject: |
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| I didn't try that this time, but whenever I've done this in the past I've always gotten the device busy message. What we really need is a -f switch on rmmod to force removal of the module. |
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xentric
Guru
Joined: 16 Mar 2003
Posts: 410
Location: Netherlands
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| Posted: Sun Jul 06, 2003 5:30 am Post subject: |
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Uhhm.. when I do "man rmmod" I see a --force and a --wait option:
| Code: | -f --force
This option can be extremely dangerous: it has no effect unless CONFIG_MOD-
ULE_FORCE_UNLOAD was set when the kernel was compiled. With this option,
you can remove modules which are being used, or which are not designed to
be removed, or have been marked as unsafe (see lsmod(8)).
-w --wait Normally, rmmod will refuse to unload modules which are in use. With this
option, rmmod will isolate the module, and wait until the module is no
longer used. Noone new will be able to use the module, but it's up to you
to make sure the current users eventually finish with it. See lsmod(8))
for information on usage counts.
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sl70
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Joined: 18 Jun 2002
Posts: 459
Location: Saitama, JP
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| Posted: Mon Jul 07, 2003 7:46 pm Post subject: |
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| Huh? I don't have that in my man rmmod! What version of modutils are you using? Mine is sys-apps/modutils-2.4.25. |
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xentric
Guru
Joined: 16 Mar 2003
Posts: 410
Location: Netherlands
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| Posted: Mon Jul 07, 2003 8:13 pm Post subject: |
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I have the same version, but I also played with the 2.5.x kernels. I had to
emerge the 'module-init-tools' package so maybe this changed my rmmod!? |
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