Running X window programs from PM suspend-resume scripts

Hello,

Is there a trick to run X window programs from PM suspend-resume 
hooks? For example, I need to restore keyboard mapping after suspend 
to RAM using 

xkbcomp some_file.xkm :0.0

Running this in

#!/bin/bash
DISPLAY=":0.0"
export DISPLAY
case $1 in
    hibernate | suspend)
	;;
    thaw | resume)
        sleep 2
	chvt 1
	sleep 1
	xkbcomp /home/mirsev/GoodKeyMap.xkm $DISPLAY
	;;
    *)
        ;;
esac
exit 0

gives an error: Cannot open display ":0.0"

Any idea?

Serguei.
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