"vol_mute"
XF86AudioMute
-"backlight_adjust +5"
+"sudo /home/siraaj/bin/backlight_adjust +5"
XF86MonBrightnessUp
-"backlight_adjust -5"
+"sudo /home/siraaj/bin/backlight_adjust -5"
XF86MonBrightnessDown
+# mate-screensaver equivalent: "mate-screensaver-command --lock"
"xscreensaver-command -activate"
XF86ScreenSaver
"xscreensaver-command -activate"