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-rw-r--r--drivers/platform/x86/dell-wmi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 8d102195a392..7c918e373ac2 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -233,7 +233,7 @@ static const u16 bios_to_linux_keycode[256] = {
[18] = KEY_PROG1,
[19] = KEY_BRIGHTNESSDOWN,
[20] = KEY_BRIGHTNESSUP,
- [21] = KEY_UNKNOWN,
+ [21] = KEY_BRIGHTNESS_AUTO,
[22] = KEY_KBDILLUMTOGGLE,
[23] = KEY_UNKNOWN,
[24] = KEY_SWITCHVIDEOMODE,