I have a Clevo X7200 (ICH10 ALC888) and snd-hda-intel doesn't work very well with it. When left without options, alsamixer (and kmixer) seems quite correct for 7.1 sound but despite setting all sliders to max, sound is so faint that it's barely possible to notice. When the option model=auto is given, sound can be heard but not from all speakers and only front sliders are shown in the mixer. Finally, whilst the function keys for adjusting volume work and the change can be seen in the mixer, the volume leds on the laptop do not change and remain at minimum volume, which might be related. More info:
http://www.alsa-project.org/db/?f=c30260aff2db9a6b63f69797e5553d1e11f8f283
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