Hooks to adapt a notebook to different conditions

So, I use Ubuntu 12.04 on my notebook.

Here a list of (shell) hooks I implemented to make the system adapt to "the environment". Only the minimum relevant code

• Open/close lid -> internal screen on/off
  /etc/acpi/local/lid.sh.pre
  DISPLAY=:0
grep -q closed /proc/acpi/button/lid/*/state
xrandr -display $DISPLAY --output $internal --off

• When (un)docked -> external monitor on/off.  un/docking detected by AC online. No other way found (with Dell latitude e*)
  
  /etc/acpi/power.sh
  
  if [ $(cat /sys/class/power_supply/AC/online) = "1" ]; then
  DISPLAY=:0 xrandr --output DP-1 --auto --rotate left 
• Turn audio off/on  when on office network/at home:
  /etc/dhcp/dhclient-enter-hooks.d/  does not work with NM (see https://bugzilla.gnome.org/show_bug.cgi?id=709247 )
  So /etc/network/if-up.d/mute-in-office
  
   if [ ${DHCP4_DOMAIN_NAME-} = 'domain.name' ];
     amixer set Master mute
   elif [ ${CONNECTION_ID-} = "home-ssid" ];
          amixer set Master unmute
          amixer set Front unmute
          amixer set Headphone unmute
  
  
• prevent Skype from animating (in gnome-panel) when offline
  skype without any dbus  access?
  
  /etc/network/if-post-down.d/stop-skype
  sleep 10s
  killall -STOP skype
  
  /etc/network/if-up.d/resume-skype
  killall -CONT skype
  
• keep cpu at minimum
  /etc/pm/sleep.d/20-cpuspeed
  case "$1" in
          resume | thaw)
  sudo cpufreq-set --governor powersave
  foreach dir (/sys/devices/system/cpu/cpu*/cpufreq/) {
     echo powersave | sudo tee $dir/scaling_governor
     echo 1199000 | sudo tee $dir/scaling_min_freq
  ...
  #sudo hdparm -Y /dev/sdb