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root@debian:/# uname -a
Linux debian 2.6.32-5-686 #1 SMP Thu Nov 3 04:23:54 UTC 2011 i686 GNU/Linux

root@debian:/# cat /etc/debian_version
6.0.3

root@debian:/# dpkg -l | grep alsa
ii  alsa-base                            1.0.23+dfsg-2                     ALSA driver configuration files
ii  alsa-utils                           1.0.23-3                          Utilities for configuring and using ALSA
ii  bluez-alsa                           4.66-3                            Bluetooth ALSA support
ii  libsdl1.2debian-alsa                 1.2.14-6.1                        Simple DirectMedia Layer (with X11 and ALSA options)

root@debian:/# lsmod | grep snd
snd_hda_codec_intelhdmi     9027  1 
snd_hda_codec_idt      35329  0 
snd_hda_intel          16823  2 
snd_hda_codec          46002  3 snd_hda_codec_intelhdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep               4054  1 snd_hda_codec
snd_pcm                47226  2 snd_hda_intel,snd_hda_codec
snd_seq                35463  0 
snd_timer              12270  2 snd_pcm,snd_seq
snd_seq_device          3673  1 snd_seq
snd                    34423  13 snd_hda_codec_intelhdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq,snd_timer,snd_seq_device
soundcore               3450  1 snd
snd_page_alloc          5045  2 snd_hda_intel,snd_pcm

root@debian:/# lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 02)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 02)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 92)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 02)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02)
08:00.0 FireWire (IEEE 1394): O2 Micro, Inc. Device 13f7 (rev 05)
08:00.1 SD Host controller: O2 Micro, Inc. Device 8321 (rev 05)
08:00.2 Mass storage controller: O2 Micro, Inc. Device 8331 (rev 05)
09:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5761 Gigabit Ethernet PCIe (rev 10)
0c:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)

root@debian:/# cat /etc/modprobe.d/alsa-base-blacklist.conf
# Uncomment these entries in order to blacklist unwanted modem drivers
# blacklist snd-atiixp-modem
# blacklist snd-intel8x0m
# blacklist snd-via82xx-modem
# Comment this entry in order to load snd-pcsp driver
blacklist snd-pcsp
# Comment this entry in order to load pcspkr driver

root@debian:/# cat /etc/modprobe.d/alsa-base.conf
# autoloader aliases
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7
# Cause optional modules to be loaded above generic modules
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && { /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
# Keep snd-pcsp from beeing loaded as first soundcard
options snd-pcsp index=-2
# Keep snd-usb-audio from beeing loaded as first soundcard
options snd-usb-audio index=-2

root@debian:/# rmmod pcspkr

root@debian:/# modprobe snd_pcsp

root@debian:/# alsa force-reload
Unloading ALSA sound driver modules: snd-seq snd-seq-device snd-hda-intel snd-hda-codec-idt snd-pcsp snd-hda-codec-intelhdmi snd-hda-codec snd-hwdep snd-pcm snd-timer snd-page-alloc.
Loading ALSA sound driver modules: snd-seq snd-seq-device snd-hda-intel snd-hda-codec-idt snd-pcsp snd-hda-codec-intelhdmi snd-hda-codec snd-hwdep snd-pcm snd-timer snd-page-alloc.