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-rw-r--r--acpi-video-dos.patch17
1 files changed, 17 insertions, 0 deletions
diff --git a/acpi-video-dos.patch b/acpi-video-dos.patch
new file mode 100644
index 000000000..3e2085193
--- /dev/null
+++ b/acpi-video-dos.patch
@@ -0,0 +1,17 @@
+Disable firmware video brightness change on AC/Battery switch by default
+
+-- mjg59
+
+diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
+index bac2901..93b1a9e 100644
+--- a/drivers/acpi/video.c
++++ b/drivers/acpi/video.c
+@@ -1818,7 +1818,7 @@ static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
+
+ static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
+ {
+- return acpi_video_bus_DOS(video, 0, 0);
++ return acpi_video_bus_DOS(video, 0, 1);
+ }
+
+ static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)