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Date: Fri, 3 Apr 2009 11:52:30 +0200
From: Patrick =?ISO-8859-15?Q?Lamaizi=E8re?= <patfbsd@davenulle.org>
To: kyanh <xkyanh@gmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: [snd_hda] hear no sound if acpi=on
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Le Fri, 3 Apr 2009 13:24:49 +0700,
kyanh <xkyanh@gmail.com>:

> Hello all,
> 
> I have FreeBSD-7.1-RELEASE on my Laptop (compaq presario cq40-401
> au). In formation of my devices can be found at
> 
> * http://viettug.org/attachments/download/128/icy_pciconf.txt
> (`pciconf -lbv`)
> * http://viettug.org/attachments/download/132/icy_lspci_nn.txt
> (`lspci -nn`)
> * http://viettug.org/attachments/download/147/icy_kernel.txt (the
> kernel configuration)
> 
> When I boot the system with `acpi=off`, I can hear the sound
> (snd_hda). But when `acpi` is used, I hear no sound though the driver
> seems to work and `mplayer` detects /dev/sp and /dev/mixer
> successfully.
> 
> <pre>
> $ cat /dev/sndstat
> FreeBSD Audio Driver (newpcm: 32bit 2007061600/i386)
> Installed devices:
> pcm0: <ATI (Unknown) High Definition Audio Controller>
>    at memory 0x92410000 irq 19 kld snd_hda [20080420_0052] [MPSAFE]
> (mixer only) pcm1: <ATI SB600 High Definition Audio Controller> at
> memory 0x92500000 irq 16 kld snd_hda [20080420_0052] [MPSAFE]
> (1p:1v/1r:1v channels duplex)
> </pre>
> 
> I don't experience FreeBSD much. Could you help me to turn the sound
> on?

There were some changes in snd_hda just after the 7.1-RELEASE. You can
try to update to a 7-STABLE. You can also take the files of snd_hda from
current or from stable (/usr/src/sys/dev/sound/pci/hda/*) and rebuild
the kernel module.

Regards.