sound card (WAS: FreeBSD 4.10 RELEASE questions)

[Bob Johnson]

> Message: 8
> Date: Wed, 9 Jun 2004 21:55:14 -0400
> From: Louis LeBlanc <freebsd at keyslapper.org>
> Subject: FreeBSD 4.10 RELEASE questions
> To: FreeBSD Questions <freebsd-questions at FreeBSD.org>
> Message-ID: <20040610015514.GA734 at keyslapper.org>
> 
> Hey everyone.  I have a confusing situation here with the new kernel.
> 
> I just upgraded to 4.10, and in the process, decided to get a
> moderately updated kernel config.  Particularly, I wanted to try to
> get my sound working again.
> 
> Here's the thing.  I have the following lines in my kernel config:
> device          pcm
> 
[deleted details]
> Problem is that I'm not sure if I should have the following:
> 
> device          pcm0 at isa? irq 10 drq 1 flags 0x0

Everything after "pcm0" is there for the benefit of ISA cards that are 
not PNP-aware.  Your "device pcm" should be entirely adequate for a PCI 
card that does correct PNP configuration.  It certainly works for me.

Also, if your system doesn't physically have SIO2 or SIO3, you can 
remove those statements (which were in the details I deleted above).

> 
> Note that my fxp0 is using irq 10.  Should I just change the irq?
> Should I leave it and/or the PNPBIOS line out?
> 

My system shows several unknown devices which are presumably various 
features of the motherboard that I'm not using, so don't be too 
concerned about the unknown device.  PCI devices are assigned IRQs 
dynamically, and you should not need to worry about which device ended 
up on which IRQ as long as it doesn't conflict with an ISA device in 
your system.

If dmesg.boot shows a "pcm0" device somewhere then your sound card 
should be working.  E.g.:

# grep pcm0 /var/run/dmesg.boot
pcm0: <VIA VT8235> port 0xe000-0xe0ff irq 5 at device 17.5 on pci0
pcm0: <Avance Log\M-ic ALC650 AC97 Codec>
#

I believe that in 4.10 you still have to do

# cd /dev
# sh MAKEDEV snd0

to populate /dev with the appropriate devices after you get the driver 
loading properly (snd0 is not actually one of them, so don't look for 
it).  I guess you're familiar with that, since you had your sound 
working in the past, but maybe you forgot.  After you've done that, 
something like

# cat /dev/sndstat

should tell you what you ended up with, in its own cryptic way.

To get the PCI card correctly recognized, you may need to play with the 
"PNP BIOS" setting in your BIOS configuration, although I don't think 
that's your problem in this case.

If your sound card actually is an ISA device, you need to set the IRQ 
and possibly DRQ settings in the config line to what the card is 
expecting.  You may also have to go into your device and reserve that 
IRQ for your ISA device to keep it from being assigned to a PnP device.

> I'm sure there's some pertinent details I'm leaving out, so don't
> hesitate to let me know what it is.
> 
> Thanks for the feedback.

I hope that helps.

> 
> Lou
> -- Louis LeBlanc leblanc at keyslapper.org Fully Funded Hobbyist, KeySlapper Extrordinaire :) http://www.keyslapper.org Ô¿Ô¬ Where are the calculations that go with a calculated risk? 

- Bob