diff --git a/locker/src/monitor.rs b/locker/src/monitor.rs
index fcf7e4a..276e843 100644
--- a/locker/src/monitor.rs
+++ b/locker/src/monitor.rs
@@ -547,7 +547,7 @@ fn find_backlight_control(conn: &xcb::Connection, output: randr::Output) -> anyh
         if let Ok(reply) = conn.wait_for_reply(cookie) {
             let values = reply.valid_values();
             if reply.range() && values.len() == 2 {
-                let min_level = values[0];
+                let min_level = values[0] + 1;
                 let max_level = values[1];
                 let range = max_level - min_level;
                 if range > 0 {
@@ -577,7 +577,7 @@ fn find_backlight_control(conn: &xcb::Connection, output: randr::Output) -> anyh
                 debug!("Found sysfs backlight control at {:?}", cur_path);
                 return Ok(Some(BacklightControl {
                     location: BacklightLocation::Sysfs(cur_path),
-                    min_level: 0,
+                    min_level: 1,
                     max_level,
                     step: calc_step(0, max_level),
                 }));