Fix for sound issue in Ubuntu 9.04 HP Pavilion dv4000

The sound was giving error on my HP dv4000 running Ubuntu 9.04.

Here is the listing of my hardware modules:

00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 04)
Subsystem: Hewlett-Packard Company Device 309d
Flags: bus master, medium devsel, latency 0, IRQ 17
I/O ports at 1c00 [size=256]
I/O ports at 18c0 [size=64]
Memory at b0040800 (32-bit, non-prefetchable) [size=512]
Memory at b0040400 (32-bit, non-prefetchable) [size=256]
Capabilities:
Kernel driver in use: Intel ICH
Kernel modules: snd-intel8x0

Adding following at the end of /etc/modprobe.d/alsa-base.conf

options snd-intel8x0 ac97_quirk=1 buggy_irq=1 buggy_semaphore=1


if ac97_quirk=1 doesn't work, try 0,2,3 or 4 as value.

Reboot.