nVidia fans, optical out off, bluetooth off

Turn off optical out

To find out the name of the optical device, check the 
output of amixer:

amixer > test.txt (then open test.txt and look for IEC958-something).

Turn off optical s/pdif IEC958:

/usr/bin/amixer set 'IEC958' 'Playback' 'off'

About optical out:
http://www.mythtv.org/wiki/Setting_A_Button_On_Your_Remote_To
_Toggle_The_S/PDIF_Audio_Source

About bluetooth:
http://catlingmindswipe.blogspot.se/2012/05/how-to-disable-
bluetooth-on-startup.html

nVidia GPU:s - Adjusting fan speed

Run this to install settings dialog;

apt-get install nvidia-settings

Check for xorg.conf file:
dir /etc/X11/xorg.conf

If the file does not exist, do the following:

X :1 -configure
mv xorg.conf.new /etc/X11/xorg.conf

Open xorg.conf in an editor

If you just created the file, remove all sections but
the following considering the nVidia card:


Section "Device"
        Identifier  "Card1"
        Driver      "nvidia"
        BusID       "PCI:1:0:0"
EndSection

Then  add a "Coolbits" line, this allows control of fan speed:

Section "Device"
        Identifier  "Card1"
        Driver      "nvidia"
        BusID       "PCI:1:0:0"
        Option "Coolbits" "4"
EndSection

Save the file. You may also try 5 as a value for coolbits
if it does not work.

You may now open nvidia-settings in Unity and change speed
for the session.

Do this to set fan speed without the dialog;
/usr/bin/nvidia-settings -a [gpu:0]/GPUFanControlState=1
/usr/bin/nvidia-settings -a [fan:0]/GPUCurrentFanSpeed=55

If you want to make the changes permanent, make a script file
and put the script file into the startup applications (in Unity).