add presentation mode hack for volo

diff --git a/presentation_mode b/presentation_mode
new file mode 100755 (executable)
index 0000000..e56427e
--- /dev/null
+++ b/presentation_mode
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if [ -n "$1" ]; then
+    xrandr -s 1024x768
+    xmodmap -e 'keysym Left = p'
+    xmodmap -e 'keysym Right = n'
+    killall xscreensaver
+else
+    xrandr -s 1440x900
+    xmodmap -e 'keycode 102 = Right'
+    xmodmap -e 'keycode 100 = Left'
+    # XXX test to see if the X screensaver is already running
+    /usr/bin/xscreensaver & >/dev/null 2>&1
+fi;
\ No newline at end of file