From: Andy Lutomirski <luto@xxxxxxxxxx>
This is based on Mario's explanation and observation of my laptop.
Suggested-by: "Pali Rohár" <pali.rohar@xxxxxxxxx>
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Mario Limonciello <mario_limonciello@xxxxxxxx>
Cc: Matthew Garrett <mjg59@xxxxxxxxxxxxx>
Cc: Andy Shevchenko <andy@xxxxxxxxxxxxx>
Signed-off-by: Darren Hart (VMware) <dvhart@xxxxxxxxxxxxx>
---
drivers/platform/x86/dell-wmi.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 24467b1..73aee0d 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -272,7 +272,12 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = {
/* RGB keyboard backlight control */
{ KE_IGNORE, 0x154, { KEY_RESERVED } },
- /* Stealth mode toggle */
+ /*
+ * Stealth mode toggle. This will "disable all lights and sounds".
+ * The action is performed by the BIOS and EC; the WMI event is just
+ * a notification. On the XPS 13 9350, this is Fn+F7, and there's
+ * a BIOS setting to enable and disable the hotkey.
+ */
{ KE_IGNORE, 0x155, { KEY_RESERVED } },
/* Rugged magnetic dock attach/detach events */
--
2.9.4
