No sound with Intel 82801DB/DBL/DBM Audio Controller

I reinstalled Hardy heron a few days ago and now I have no sound. I have a 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01) as per my lspci command. The odd thing about this is that when I installed Gusty some months ago, the same thing happened until I downloaded the gnome-alsamixer program and fiddled with the controls some. I upgraded to Hardy and had sound there as well. But having reinstalled, sound is gone once again.

My lsmod output looks like this:

Module Size Used by
ipv6 267780 8
af_packet 23812 2
i915 32128 2
drm 82452 3 i915
rfcomm 41744 2
l2cap 25728 13 rfcomm
bluetooth 61156 4 rfcomm,l2cap
ppdev 10372 0
speedstep_lib 6532 0
cpufreq_powersave 2688 0
cpufreq_conservative 8712 0
cpufreq_ondemand 9740 0
cpufreq_userspace 5284 0
cpufreq_stats 7104 0
freq_table 5536 2 cpufreq_ondemand,cpufreq_stats
video 20112 0
output 4736 1 video
sbs 15112 0
ac 6916 0
sbshc 7680 1 sbs
dock 11280 0
container 5632 0
battery 14212 0
iptable_filter 3840 0
ip_tables 14820 1 iptable_filter
x_tables 16132 1 ip_tables
lp 12324 0
evdev 13056 3
dcdbas 9504 0
parport_pc 36260 1
parport 37832 3 ppdev,lp,parport_pc
psmouse 40336 0
serio_raw 7940 0
pcspkr 4224 0
ac97_bus 3200 0
snd_page_alloc 11656 0
button 9232 0
shpchp 34452 0
iTCO_wdt 13092 0
iTCO_vendor_support 4868 1 iTCO_wdt
pci_hotplug 30880 1 shpchp
i2c_i810 5636 0
i2c_algo_bit 7300 1 i2c_i810
intel_agp 25492 1
agpgart 34760 3 drm,intel_agp
i2c_core 24832 2 i2c_i810,i2c_algo_bit
ext3 136712 1
jbd 48404 1 ext3
mbcache 9600 1 ext3
sg 36880 0
sr_mod 17956 0
cdrom 37408 1 sr_mod
usbhid 31872 0
hid 38784 1 usbhid
sd_mod 30720 3
ata_generic 8324 0
pata_acpi 8320 0
b44 28432 0
floppy 59588 0
ata_piix 19588 2
ssb 32772 1 b44
mii 6400 1 b44
libata 159344 3 ata_generic,pata_acpi,ata_piix
scsi_mod 151436 4 sg,sr_mod,sd_mod,libata
ehci_hcd 37516 0
uhci_hcd 27024 0
usbcore 146028 4 usbhid,ehci_hcd,uhci_hcd
thermal 16796 0
processor 36872 1 thermal
fan 5636 0
fuse 50580

I am using a Dell Dimension 2400 PC. Does any one have any clue what could be the problem? Thanks in advance.