core-agent-linux/qubes-rpc/prepare-suspend

#!/bin/sh

action=$1
[ -z "$action" ] && action=suspend

MODULES_BLACKLIST=""
if [ -r /etc/qubes-suspend-module-blacklist ]; then
    MODULES_BLACKLIST="$MODULES_BLACKLIST `cat /etc/qubes-suspend-module-blacklist`"
fi
if [ -r /rw/config/suspend-module-blacklist ]; then
    MODULES_BLACKLIST="$MODULES_BLACKLIST `cat /rw/config/suspend-module-blacklist`"
fi

if [ x"$action" == x"suspend" ]; then
    dbus-send --system --print-reply          \
        --dest=org.freedesktop.NetworkManager \ 
        /org/freedesktop/NetworkManager       \
        org.freedesktop.NetworkManager.Sleep boolean:true ||  \
        service NetworkManager stop
    # Force interfaces down, just in case when NM didn't done it
    for if in `ls /sys/class/net|grep -v "lo\|vif"`; do 
        ip l s $if down
    done
    LOADED_MODULES=""
    for mod in $MODULES_BLACKLIST; do
        if lsmod |grep -q $mod; then
            LOADED_MODULES="$LOADED_MODULES $mod"
            modprobe -r $mod
        fi
    done
    echo $LOADED_MODULES > /var/run/qubes/suspend-modules-loaded
else
    for mod in `cat /var/run/qubes/suspend-modules-loaded`; do
        modprobe $mod
    done
    dbus-send --system --print-reply          \
        --dest=org.freedesktop.NetworkManager \
        /org/freedesktop/NetworkManager       \
        org.freedesktop.NetworkManager.Sleep boolean:false ||  \
        { [ -x /bin/systemctl ] && systemctl start NetworkManager.service; } || service qubes-core-netvm start
fi