Hardware support for AMD Geode CS5536 audio?

ancelgray ancelgray at yahoo.com
Mon Dec 1 22:46:25 PST 2008

Lionel replies:

Hi Andrew, thank you for your quick reply.

"cat count.raw > /dev/dsp" does indeed work without any message in the

If I try to cat /dev/urandom > /dev/dsp I get a very thin white-ish
noise and still no message. (I set all levels to 100 with mixer(8))

This is rather encouraging, I hope it helps.

By the way, I forgot to put the version I'm running in my last
# uname -a
FreeBSD home.svkt.org 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #1: Sat \
Nov 1 23:24:38 CET 2008 \
simias at casibsd:/home/simias/build-fitpc/obj/i386/usr/src/sys/FITPC-CONF \

Tell me if I can try something else or if you want me to provide you
more details about my system. I'm using a heavily trimmed down kernel
configuration so maybe I inadvertently disabled something mpg123


OK, this is indeed encouraging.  Perhaps my default block size of 256 bytes
is too small for the 
44 Khz audio.  I did not test the driver with mpg123.  I am using Linphone
with just
mono 8 Khz audio.  The 256 byte block size works fine for me.

I will install the mpg123 package soon and see what's up.

Thanx again for testing.

Andrew Gray
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