From: Josh Boyer Date: Wed, 2 Nov 2011 18:32:00 +0000 (-0400) Subject: sony-laptop: Enable keyboard backlight by default X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6fe6ae56a7cebaebc2e6daa11c423e4692f9b592;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 https://bugzilla.redhat.com/show_bug.cgi?id=728478 Signed-off-by: Josh Boyer Acked-by: Mattia Dongili Signed-off-by: Matthew Garrett --- diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index c006dee5ebfe..40c470507e50 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)"); #endif -static int kbd_backlight; /* = 1 */ +static int kbd_backlight = 1; module_param(kbd_backlight, int, 0444); MODULE_PARM_DESC(kbd_backlight, "set this to 0 to disable keyboard backlight, "