diff --git a/[refs] b/[refs]
index 51f637ebf7a3..b75cee02d7b9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 74a365b3f354fafc537efa5867deb7a9fadbfe27
+refs/heads/master: 98758faffc86ee6fe9504eeab75481ee7c1aa860
diff --git a/trunk/drivers/acpi/video_detect.c b/trunk/drivers/acpi/video_detect.c
index 50e3d2dbf3af..09737275e25f 100644
--- a/trunk/drivers/acpi/video_detect.c
+++ b/trunk/drivers/acpi/video_detect.c
@@ -55,6 +55,9 @@ acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context,
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight "
 				  "support\n"));
 		*cap |= ACPI_VIDEO_BACKLIGHT;
+		if (ACPI_FAILURE(acpi_get_handle(handle, "_BQC", &h_dummy)))
+			printk(KERN_WARNING FW_BUG PREFIX "ACPI brightness "
+					"control misses _BQC function\n");
 		/* We have backlight support, no need to scan further */
 		return AE_CTRL_TERMINATE;
 	}