pcm ain't working - running 5.1 on Thinkpad 600

[Kevin Oberman]

> Date: Wed, 3 Dec 2003 16:52:41 -0800 (PST)
> From: Davis Doherty <doherty at math.washington.edu>
> Sender: owner-freebsd-mobile at freebsd.org
> 
> 
> So I inherited this IBM Thinkpad 600 (not one of those fancy ones with a
> letter after the 600) as my first laptop, and decided I would try (a) the
> FreeBSD 5.x tree for the first time and (b) FreeBSD on a laptop for the
> first time. Right now, the biggest nuisance is that I cannot, for the life
> of me, get the sound to work.
> 
> So far, I have tried putting
> 
> device       pcm
> 
> in my kernel and compiling. After doing a make and a make install followed
> by a reboot, I get the message
> 
> pcm0: <CS423x> on isa0
> device_probe_and_attach: pcm0 attach returned 6
> 
> A quick 'less -f /dev/sndstat' shows no installed devices. Furthermore,
> no sound-related device is present in /dev (there's no mixer, dsp, snd,
> pcm, or what have you). Were I running any other tree, I'd think I had
> forgotten to do a 'sh MAKEDEV snd0'.
> 
> So then I follow the advice of 'man pcm' and add the lines
> 
>      hint.pcm.0.at="isa"
>      hint.pcm.0.irq="5"
>      hint.pcm.0.drq="1"
>      hint.pcm.0.flags="0x0"
> 
> in my /boot/device.hints file, but to no avail -- absolutely nothing
> changes (that I can tell, anyway).
> 
> Just for fun, I even tried adding
> 
> device csa
> 
> to my kernel (though I didn't really expect this to work), and all that
> changed was that the boot message above had 'pcm1' instead of 'pcm0'.
> 
> Any suggestions will receive my hearty appreciation.

First, your pcm.0.flags probably should be 0x10. You probably also will
need hint.pcm.o.port="0x52c". 

Finally, if this is a 600E you need to edit
/sys/conf/files. delete/comment out "dev/sound/pci/csa.c optional pcm
pci" (be careful that you get the right one!) and edit the line after
next to read "dev/sound/pci/csapcm.c optional csa pcm pci". I'm not
confident that this is needed on a 600, though.

FWIW, by probe line for the sound reads:
pcm0: <CS423x-PCI> at port 0x220-0x233,0x388-0x38b,0x530-0x537 irq 5 drq
0,1 on isa0

It is a rather out-of-date system as it takes forever to build world and
it's only a test system. It was built back in June, but I doubt that any
of this has changed. Also, my 600E did not gat along with ACPI at all
well and I use APM on it.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634