#!/bin/sh

# discover video card's ID
vID=`lspci | sed -e '/VGA/!d' -e 's/ .*//' -e 's@0000:@@' -e 's@:@/@' -eq`
aID=`lspci | sed -e '/audio/!d' -e 's/ .*//' -e 's@0000:@@' -e 's@:@/@' -eq`

# securely create a temporary file
vTMP_FILE=`mktemp /var/tmp/video_state.XXXXXX`
trap 'rm -f $vTMP_FILE' 0 1 15

aTMP_FILE=`mktemp /var/tmp/audio_state.XXXXXX`
trap 'rm -f $aTMP_FILE' 0 1 15

# switch to virtual terminal 1 to avoid graphics
# corruption in X
chvt 1

# synchronize system clock with hardware
/sbin/hwclock --directisa --localtime --systohc

# write all unwritten data (just in case)
sync

# dump current data from the video card to the
# temporary file
cat /proc/bus/pci/$vID > $vTMP_FILE
cat /proc/bus/pci/$aID > $aTMP_FILE

# suspend or hibernate
case "$1" in
  suspend)   /usr/sbin/s2ram ;;
  hibernate) /usr/sbin/s2disk  ;;
  both) /usr/sbin/s2both  ;;
esac

# restore video card data from the temporary file
# on resume
cat $vTMP_FILE > /proc/bus/pci/$vID
cat $aTMP_FILE > /proc/bus/pci/$aID

# synchronize hardware clock with system
/sbin/hwclock --directisa --localtime --hctosys

# switch back to virtual terminal 7 (running X)
chvt 5

# remove temporary file
rm -f $vTMP_FILE
rm -f $aTMP_FILE