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From 0dbc2bc96b1ec741bdd43451c286ccd45da3310b Mon Sep 17 00:00:00 2001
From: Josh Boyer <>
Date: Wed, 2 Nov 2011 14:31:59 -0400
Subject: [PATCH] sony-laptop: Enable keyboard backlight by default

When the keyboard backlight support was originally added, the commit said
to default it to on with a 10 second timeout.  That actually wasn't the
case, as the default value is commented out for the kbd_backlight parameter.
Because it is a static variable, it gets set to 0 by default without some
other form of initialization.

However, it seems the function to set the value wasn't actually called
immediately, so whatever state the keyboard was in initially would remain.
Then commit df410d522410e67660 was introduced during the 2.6.39 timeframe to
immediately set whatever value was present (as well as attempt to
restore/reset the state on module removal or resume).  That seems to have
now forced the light off immediately when the module is loaded unless
the option kbd_backlight=1 is specified.

Let's enable it by default again (for the first time).  This should solve

Acked-by: Mattia Dongili <>
Signed-off-by: Josh Boyer <>
 drivers/platform/x86/sony-laptop.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index c006dee..40c4705 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -127,7 +127,7 @@ MODULE_PARM_DESC(minor,
 		 "default is -1 (automatic)");
-static int kbd_backlight;	/* = 1 */
+static int kbd_backlight = 1;
 module_param(kbd_backlight, int, 0444);
 		 "set this to 0 to disable keyboard backlight, "