pcm on 5.1
dkelly at HiWAAY.net
Thu Jul 3 19:15:07 PDT 2003
On Thursday 03 July 2003 07:01 pm, Kenneth Culver wrote:
> On Thursday, July 3, 2003, at 07:58 PM, Laszlo Vagner wrote:
> > I just updated to 5.1-r and was wondering how to add soundcard
> > support to the
> > kernel.?
> > in 4.8 i just added 'device pcm' in my kernel config and recompiled
> > but 5.1 is different
> > and i dont want to do something to mess things up.
> > dmesg follows.
> Just do what you've always done. Add device pcm to your kernel.
I don't think its quite that easy, but its even easier now.
% cd /usr/src/sys/i386/conf
% grep -i pcm *
GENERIC:# PCCARD (PCMCIA) support
GENERIC:# Pcmcia and cardbus bridge support
GRUMPY:# PCCARD (PCMCIA) support
GRUMPY:# Pcmcia and cardbus bridge support
NOTES:# pca: PCM audio through your PC speaker
NOTES:# gp: National Instruments AT-GPIB and AT-GPIB/TNT board, PCMCIA-GPIB
OLDCARD:# PCCARD (PCMCIA) support
OLDCARD:device pcic # PCMCIA bridge
Does not appear to be a pcm device available for statically compiling
into the kernel. But never mind as its available as a kld in
So go look in /boot/kernel/snd_* for the device which matches your
sound hardware and use kldload to give it a try something like this:
# kldload snd_es137x
I have it loading at boot time now, so kldstat looks like this:
Id Refs Address Size Name
1 12 0xc0100000 37aa68 kernel
2 1 0xc047b000 6190 snd_es137x.ko
3 2 0xc0482000 1d320 snd_pcm.ko
4 1 0xc04a0000 4a30c acpi.ko
5 1 0xc346d000 7000 ipfw.ko
6 1 0xc34bc000 2000 blank_saver.ko
7 1 0xc3592000 18000 linux.ko
Notice snd_es137x needed snd_pcm and pulled it in too.
snd_driver is a mega-module including all the other snd modules. If
you are not sure about what sound hardware you have, then
"kldload snd_driver" and go look at the tail of dmesg to see what
Then when you know what is needed edit /boot/loader.conf. Add a line
like this as I have done for snd_es137x to load the module at boot:
Now the head of my dmesg looks like this after boot:
Copyright (c) 1992-2003 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 5.1-RELEASE #0: Thu Jul 3 16:27:56 CDT 2003
dkelly at grumpy.dyndns.org:/usr/obj/usr/src/sys/GRUMPY
Preloaded elf kernel "/boot/kernel/kernel" at 0xc04ec000.
Preloaded elf module "/boot/kernel/snd_es137x.ko" at 0xc04ec21c.
Preloaded elf module "/boot/kernel/snd_pcm.ko" at 0xc04ec2cc.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc04ec378.
So all you have to do is add the right line to /boot/loader.conf. No
recompiling the kernel or anything else complex.
David Kelly N4HHE, dkelly at hiwaay.net
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.
More information about the freebsd-questions