Laptop LG-LW65 intel hda cmi9880 problem

i friends

i have an lg-lw65 portable
so i have installed ubuntu 7.10 on my laptop.
but i can make work the sound on the internal speakers
the sound playes on the headphones but not on the speakers

i have readed the intire thread.

my soundcard is, according with de aplay -l:

placa 0: Intel [HDA Intel], dispositivo 0: CMI9880 [CMI9880]
Subdispositivos: 0/1
Subdispositivo #0: subdevice #0
placa 0: Intel [HDA Intel], dispositivo 6: Si3054 Modem [Si3054 Modem]
Subdispositivos: 1/1
Subdispositivo #0: subdevice #0

i tried to put the line:

options snd-hda-intel model=minimal

on the alsa-base file

but still no sound on the speakers

i have already tried:

minimal 3-jack in back
min_fp 3-jack in back, 2-jack in front
full 6-jack in back, 2-jack in front
full_dig 6-jack in back, 2-jack in front, SPDIF I/O
allout 5-jack in back, 2-jack in front, SPDIF out
auto auto-config reading BIOS (default)

but still not working

i'm tired of trying many tips but i can put sound on speakers

my alsa-base version are the lastest 1.1.16

waiting

sorry for the english..i'm portuguese

regards friends

André Fernandes