use xrandr --mode, support for primary monitor only

Slax/debian/modules/03-desktop/rootcopy/usr/bin/fbscreensize

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+SIGNAL=~/.fehbg
+rm -f $SIGNAL
+
+OUTPUT=$(xrandr 2>/dev/null | grep 'connected' | cut -d " " -f 1)
+MODE=$1
+
+xrandr --output $OUTPUT --mode $MODE
+
+while [ -e $SIGNAL ]; do
+   sleep 0.1
+done
+
+killall -SIGUSR1 compton