Calling the pros .. sound troubleshooting

Mazen S. Alzogbi mazen.comp at
Tue Apr 13 07:51:28 PDT 2004

Kent Stewart wrote:
> On Monday 12 April 2004 01:46 pm, Mazen S. Alzogbi wrote:
>>I already posted this question in this list and got some answers that
>>was half-solutions to my case. I read a lot about this issue in every
>>resource I could get my hands on. I am very keen to make my sound
>>system work on my FreeBSD 4.9 system. This is a laptop with built-in
>>sound system. It's not old, pretty new so I suppose PCM is my way to
>>I recompiled the kernel aftering adding "device pcm". After reboot
>>and dmesg | grep pcm I get the following:
>>pcm0: <SiS 7012> at device 2.7 on pci0
>>pcm0: unable to map IO port space
>>device_probe_and_attach: pcm0 attach returned 6
>>Can someone please guide me through the process of troubleshooting in
>>a step-by-step fashion?
> There isn't one.
> I see the following and all I did was add "option pcm" and follow the 
> steps in the Handbook. Since it isn't working for you, you may have 
> some competition for the I/O port space.
> pcm0: <SiS 7012> port 0xc400-0xc43f,0xc800-0xc8ff irq 10 at device 2.7 
> on pci0
> pcm0: <C-Media Electronics CMI9738 AC97 Codec>
> You might get a clue by running "pciconf -l". You might also find 
> something by doing a "boot -v" instead of booting the normal way.
> They may have added a new chipset and you need the pciconf information 
> to patch the sound driver. Everytime I have received a "returned 6", I 
> have had to program something or get some one else to do it. Your best 
> bet there is the people that are maintaing pcm.
> Kent

Thanks for your reply. I ran the pciconf -lv command I can see the 
following under multimedia?:

none1 at pci0:2:7: class=0x040100 card=0x42011558 chip=0x70121039 rev=0xa0 
     vendor   = 'Silicon Integrated Systems (SiS)'
     device   = 'SiS7012 PCI Audio Accelerator'
     class    = multimedia
     subclass = audio

But what does that mean ? Doens't it mean it can see it but can't probe it?

I believe that the pcm0 is fighting for IRQ 10 which is used by:

ohci1: <SiS 5571 USB controller> mem 0xec001000-0xec001fff irq 10 at 
device 2.3 on pci0
fwohci0: <1394 Open Host Controller Interface> irq 10 at device 11.0 on pci0

Is there anything I can do to resolve this, you think?

Thanks again,

Mazen S. Alzogbi

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