From 018786dab8e253fe45347aea8313ac291d3b858a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Mon, 3 Apr 2023 20:38:21 +0200
Subject: [PATCH] output-xrandr: Don't treat 0 as invalid backlight value

Whether a value is in range depends on the backlight-min/max values,
and I didn't spot anything that excludes 0 as a valid lower limit
outright.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2947>
---
 src/backends/x11/meta-output-xrandr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backends/x11/meta-output-xrandr.c b/src/backends/x11/meta-output-xrandr.c
index 383babffb..d70063757 100644
--- a/src/backends/x11/meta-output-xrandr.c
+++ b/src/backends/x11/meta-output-xrandr.c
@@ -529,7 +529,7 @@ output_get_backlight_xrandr (MetaOutput *output)
     return -1;
 
   value = ((int*)buffer)[0];
-  if (value > 0)
+  if (value >= 0)
     return normalize_backlight (output, value);
   else
     return -1;