envy-video

#!/bin/bash

LOG=/tmp/switch_log
TMP=/tmp/switch_tmp
SWITCH_FILE=/sys/kernel/debug/vgaswitcheroo/switch
DIS_CHECK=DIS:+
IGD_CHEClK=IGD:+
NOW=`date`

case $1 in
sleep) 
    echo "--${NOW}--" >> $LOG
    echo "Sleeping" >> $LOG

    # check if DIS is active
    grep -q $DIS_CHECK $SWITCH_FILE
    if [ "$?" -eq "0" ]; then
        echo "DIS active" >> $LOG
        
        # record current state
        echo "DIS:+" > $TMP

        # activate IGD
        echo "DIGD" > $SWITCH_FILE
        
        # restart gdm - activates switch
        /etc/rc.d/gdm restart
    else
        # record IGD state for wakeup
        echo "IGD:+" > $TMP
    fi
    # assume we are on IGD already
    # power on un-used (discrete) card (somehow this prevents issues)
    echo "ON" > $SWITCH_FILE

    ;;
wake)
    echo "--${NOW}--" >> $LOG
    echo "Waking" >> $LOG

    # check if DIS *was* active
    grep -q $DIS_CHECK $TMP
    if [ "$?" -eq "0" ]; then
        echo "DIS *was* active. Re-enabling." >> $LOG
        
        # activate DIS
        echo "DDIS" > $SWITCH_FILE
        
        # restart gdm - activates switch
        /etc/rc.d/gdm restart

        # power on IGD for brightness
        echo "ON" > $SWITCH_FILE
    else
        echo "IGD *was* active. Turning off DIS for power saving." >> $LOG
        echo "OFF" > $SWITCH_FILE
    fi
    
    ;;
ac-on)
    echo "--${NOW}--" >> $LOG
    echo "AC power. Enable DIS" >> $LOG

    echo "DDIS" > $SWITCH_FILE

    if [ $2 != "boot" ]; then
        /etc/rc.d/gdm restart
    fi

    echo "ON" > $SWITCH_FILE

    ;;
ac-off)
    echo "--${NOW}--" >> $LOG
    echo "Battery power. Enable IGD" >> $LOG

    echo "DIGD" > $SWITCH_FILE

    if [ $2 != "boot" ]; then
        /etc/rc.d/gdm restart
    fi

    echo "OFF" > $SWITCH_FILE

    ;;
esac

# alway log switch state after running this
cat $SWITCH_FILE >> $LOG