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SND_VIA8233(4)		     Kernel Interfaces Manual		  SND_VIA8233(4)

NAME
     snd_via8233 -- VIA Technologies VT8233 bridge device driver

SYNOPSIS
     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

	   device sound
	   device snd_via8233

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

	   snd_via8233_load="YES"

DESCRIPTION
     The snd_via8233 bridge driver allows the generic audio driver, sound(4), to
     attach  to  the  VIA  VT8233 audio devices.  These audio chipsets are inte-
     grated in the southbridge on many VIA based motherboards.

   Runtime Configuration
     The following sysctl(8) variables are available in addition to those avail-
     able to all sound(4) devices:

	   dev.pcm.%d.polling  Experimental polling mode, where the driver oper-
			       ates by querying the device state  on  each  tick
			       using  callout(9).   Polling  is  disabled by de-
			       fault.  Do not enable it unless	you  are  facing
			       weird  interrupt problems or if the device cannot
			       generate interrupts at all.

HARDWARE
     The snd_via8233 driver supports the following audio chipsets:

     *	 VIA VT8233
     *	 VIA VT8233A
     *	 VIA VT8233C
     *	 VIA VT8235
     *	 VIA VT8237
     *	 VIA VT8251

SEE ALSO
     sound(4)

HISTORY
     The snd_via8233 device driver first appeared in FreeBSD 4.7.

AUTHORS
     This manual page was written by Joel Dahl <joel@FreeBSD.org>.

BUGS
     The snd_via8233 driver does not support S/PDIF.  There is	partial  support
     in the code, so implementing it should be fairly easy if the right hardware
     is available.

FreeBSD ports 15.1		November 29, 2006		  SND_VIA8233(4)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=snd_via8233&sektion=4&manpath=FreeBSD+15.1-RELEASE+and+Ports>

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