diff --git a/xprofile/.xprofile b/xprofile/.xprofile
index 9550d1e..30e62af 100644
--- a/xprofile/.xprofile
+++ b/xprofile/.xprofile
@@ -2,3 +2,10 @@ export GTK_THEME="Adwaita:dark";
 export QT_QPA_PLATFORMTHEME="gtk2";
 export PATH="$HOME/.local/share/JetBrains/Toolbox/scripts:$PATH"
 export PATH=$PATH:/var/lib/flatpak/exports/bin
+
+# Disable X11 screen blanking and monitor power-off permanently.
+if command -v xset >/dev/null 2>&1; then
+    xset s off
+    xset s noblank
+    xset -dpms
+fi