Re: Unloading a sound driver
Re: Unloading a sound driver
- Subject: Re: Unloading a sound driver
- From: "B.J. Buchalter" <email@hidden>
- Date: Tue, 21 Jan 2003 21:03:16 -0500
on 1/21/03 7:34 PM, Jeff Moore at email@hidden wrote:
>
There are at least two processes that I know of that are around for the
>
entire login session that will retain references to all the audio
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devices on the system:
>
>
- The LoginWindow process will have a reference to all the audio
>
devices in the system once an alert sound or an interface sound effect
>
is played.
>
>
- The SystemUIServer process will also have references to all the
>
devices if you use the volume keys on the keyboard or the menu bar
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volume widget.
>
>
As B.J. says, kextunload ought to force things to unload. I'm not
>
certain as to how safe this option is. There may be issues if the
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device is actively doing IO.
>
>
Another way that is 100% safe is to log out, and log back in as
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">console". This will drop you into the console shell without the
>
window server running. From there, you can pretty much do whatever.
>
To add to the above, it is probably a really good idea to ensure that all
your files are saved before doing the kextunload dance -- every once and a
while I have seen LoginWindow and/or SystemUIServer crash after kextunload.
This, of course, ends your login session and will terminate all your running
apps. But this is really rare, and the 100% safe way is really slow if you
are cycling quickly.
Best regards,
B.J. (a veteran of literally hundreds of unloads/reloads)
B.J. Buchalter
Metric Halo
M/S 601 - Building 8
Castle Point Campus
Castle Point, NY 12511-0601 USA
tel +1 845 831-8600
fax +1 603 250-2451
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