Comment 20 for bug 1236965

The service manual (link I posted earlier has PDF for download) has this.
pg14 says: External 7.1CH Audio Output Supported by Headphone, Microphone, Line-In and [spdif]Surround-Out Jacks
pg15 says: HDA compliant, S/PDIF digital output, five speakers, one subwoofer, built-in mic, THX TruStudio Pro
pg17 shows four jacks as circle#2/3/4/5 -- currently I do not have anything plugged into these jacks
pg17 shows frontLeft/frontRight as circle#1 -- these are 2W speakers (and work well)
pg16 shows rearLeft/rearRight as circle#3 -- these are 1.5W speakers (and seem too quiet... when they are exercised at all by testing so far)
pg19 shows subwoofer as circle#1 -- this is the 2W subwoof (I have never got this to produce any noise, I'm reasonably certain)
Not shown explicitly in the manual... but known to alsamixer and produces good volume... is the 'Center' speaker, also 2W. Methinks this one is under the touchpad/palmrest area, which is close enough to the frontLeft/frontRight speakers that it might be hard for me to tell it was working, as opposed to, say, pulseaudio driving frontLeft at 50% and frontRight at 50% to 'simulate' a center-channel-speaker.

Reseller page over here gives wattages -- http://xoticpcforums.com/showthread.php?12026-Sager-NP8180-%28Clevo-P180HM%29-Owners-Lounge
Audio specs: THX TruStudio Pro 5.1 HD audio with two 1.5W, three 2W speakers, and one 2W sub-woofer

"Raymond: To setup your system for [external] 5.1 or 7.1 surround sound you will need to connect the audio cables to the Headphone-Out, Line-In, Microphone-In jack and S/PDIF-Out jacks (note: the S/PDIF jack is used for 7.1 surround sound only)."

I believe that is correct for *external* speakers, but I have not used the laptop that way, yet. In all my tests so far, I have only been using the 5.1 onboard speakers, not external speakers. Well, correction: I have plugged some simple one-jack headphones into the hdfon jack, to see if that did the right thing; it seemed fine. (Some other alc892 systems have trouble muting and/or re-enabling the internal speakers when you plug and unplug headphones using the hdfon-jack.) Finally, note that there is a third audio-system potentially involved here, which is hdmi-out -- the videocard has a separate audio-chipset for that purpose, which I have not tested.