Comment 88 for bug 130559

I have the same problem with my ACER ASPIRE 8920G.
I did everything : installation linux-backport-modules, changes in alsa files....reboot, but same problem : no sound at all : on headphones nor on speakers.....nothing at all ! ;-(
I am on Hardy 8.04 beta with x64.
Here are some data who can be useful for you to solve this bug (concerning essentially Acer laptop it sounds, according to what i saw before...) :

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patrick@patrick-laptop2:~$ uname -a
Linux patrick-laptop2 2.6.24-16-generic #1 SMP Thu Apr 10 12:47:45 UTC 2008 x86_64 GNU/Linux

patrick@patrick-laptop2:~$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)

patrick@patrick-laptop2:~$ cat /etc/modprobe.d/alsa-base
# 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 ; : ; }
install snd-pcm /sbin/modprobe --ignore-install snd-pcm && { /sbin/modprobe --quiet snd-pcm-oss ; : ; }
install snd-mixer /sbin/modprobe --ignore-install snd-mixer && { /sbin/modprobe --quiet snd-mixer-oss ; : ; }
install snd-seq /sbin/modprobe --ignore-install snd-seq && { /sbin/modprobe --quiet snd-seq-midi ; /sbin/modprobe --quiet snd-seq-oss ; : ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
# Cause optional modules to be loaded above sound card driver modules
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe -Qb snd-emu10k1-synth ; }
install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe -Qb snd-seq ; }

# Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)
install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe -Qb saa7134-alsa ; : ; }

# Load snd-seq for devices that don't have hardware midi;
# Ubuntu #26283, #43682, #56005; works around Ubuntu #34831 for
# non-Creative Labs PCI hardware
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe -Qb snd-seq ; }
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options saa7134-alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-usb-audio index=-2
options snd-usb-usx2y index=-2
options snd-usb-caiaq index=-2
# Ubuntu #62691, enable MPU for snd-cmipci
options snd-cmipci mpu_port=0x330 fm_port=0x388
options snd-hda-intel model=acer

patrick@patrick-laptop2:~$ cat /proc/asound/card0/codec#* | grep Codec
Codec: Realtek ALC889
Codec: Generic 11c1 ID 1040

patrick@patrick-laptop2:~$ ls /dev/snd
controlC0 hwC0D0 hwC0D1 pcmC0D0c pcmC0D0p pcmC0D4c seq timer

patrick@patrick-laptop2:~$ ls /dev/audio
/dev/audio

patrick@patrick-laptop2:~$ ls /dev/dsp*
/dev/dsp

patrick@patrick-laptop2:~$ cat /proc/asound/card0/codec\#1
Codec: Generic 11c1 ID 1040
Address: 1
Vendor Id: 0x11c11040
Subsystem Id: 0x10250145
Revision Id: 0x100200
Modem Function Group: 0x1

patrick@patrick-laptop2:~$ cat /proc/asound/cards
 0 [Intel ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xfc300000 irq 22

patrick@patrick-laptop2:~$ lsmod | grep snd
snd_hda_intel 440408 3
snd_pcm_oss 47648 0
snd_mixer_oss 20224 2 snd_pcm_oss
snd_pcm 92168 2 snd_hda_intel,snd_pcm_oss
snd_page_alloc 13200 2 snd_hda_intel,snd_pcm
snd_hwdep 12552 1 snd_hda_intel
snd_seq_dummy 5764 0
snd_seq_oss 38912 0
snd_seq_midi 10688 0
snd_rawmidi 29856 1 snd_seq_midi
snd_seq_midi_event 10112 2 snd_seq_oss,snd_seq_midi
snd_seq 63232 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 27912 2 snd_pcm,snd_seq
snd_seq_device 10644 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 70856 15 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_hwdep,snd_seq_dummy,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 10400 2 snd

patrick@patrick-laptop2:~$ dpkg --get-selections | grep backports
linux-backports-modules-2.6.24-16-generic install
linux-backports-modules-hardy install
linux-backports-modules-hardy-generic install

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Thanks a lot for cooperation

Patrick.