ubuntu 8.10 intel8x0 ICH4 sound card don't work

I'm using Asus M2N laptop.
In 8.04, sound card work after I add "acpi_irq_isa=7 noapic" to my boot option.
But after upgraded to 8.10, it don't work anymore. Any idea? Thanks!
Following are some information.
~$ lspci |grep audio
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)

~$ cat /dev/sndstat
Sound Driver:3.8.1a-980706 (ALSA v1.0.16 emulation code)
Kernel: Linux caomo-laptop 2.6.27-7-generic #1 SMP Mon Jul 28 13:49:52 UTC 2008 i686
Config options: 0

Installed drivers:
Type 10: ALSA emulation

Card config:
--- no soundcards ---

Audio devices: NOT ENABLED IN CONFIG

Synth devices: NOT ENABLED IN CONFIG

Midi devices: NOT ENABLED IN CONFIG

Timers:
7: system timer

Mixers: NOT ENABLED IN CONFIG

More details:
~$ lspci -v
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
Subsystem: ASUSTeK Computer Inc. Device 1713
Flags: medium devsel
I/O ports at e000 [size=256]
I/O ports at e100 [size=64]
Memory at 30000400 (32-bit, non-prefetchable) [size=512]
Memory at 30000600 (32-bit, non-prefetchable) [size=256]
Capabilities: <access denied>
Kernel modules: snd-intel8x0
~$ aplay -l
aplay: device_list:215: no soundcards found...

~$ cat /proc/asound/cards
--- no soundcards ---
~$ modprobe snd-intel8x0
NO error message provided, seems succeed. but still have no sounds, and found no soundcards by previous commands.
Anyone could help?
Thanks a lot!