I have a Sony laptop and I want to turn keyboard back-light off. It doesn't have a shortcut function key for doing this on the keyboard . I can turn off it with VAIO Control Center in Windows but I don't know how can I turn it off in Ubuntu 14.04.
There isn't available to me: /sys/devices/platform/sony-laptop/kbd_backlight doesn't exist on my machine.
I have this folder /sys/devices/platform/sony-laptop/ and there is three folder one power folder and two shortcut-ed folder driver , subsystem and five file contains battery_care_health , battery_care_limiter , modalias , touchpad and event
This is the output of running sudo modinfo sony-laptop:
filename: /lib/modules/3.13.0-34-generic/kernel/drivers/platform/x86/sony-laptop.ko
version: 0.6
license: GPL
description: Sony laptop extras driver (SPIC and SNC ACPI device)
author: Stelian Pop, Mattia Dongili
srcversion: 5C6E050349475558A231C59
alias: acpi*:SNY6001:*
alias: acpi*:SNY5001:*
depends:
intree: Y
vermagic: 3.13.0-34-generic SMP mod_unload modversions
signer: Magrathea: Glacier signing key
sig_key: 50:0B:C5:C8:7D:4B:11:5C:F3:C1:50:4F:7A:92:E2:33:C6:14:3D:58
sig_hashalgo: sha512
parm: debug:set this to 1 (and RTFM) if you want to help the development of this driver (int)
parm: no_spic:set this if you don't want to enable the SPIC device (int)
parm: compat:set this if you want to enable backward compatibility mode (int)
parm: mask:set this to the mask of event you want to enable (see doc) (ulong)
parm: camera:set this to 1 to enable Motion Eye camera controls (only use it if you have a C1VE or C1VN model) (int)
parm: minor:minor number of the misc device for the SPIC compatibility code, default is -1 (automatic) (int)
parm: kbd_backlight:set this to 0 to disable keyboard backlight, 1 to enable it (default: no change from current value) (int)
parm: kbd_backlight_timeout:meaningful values vary from 0 to 3 and their meaning depends on the model (default: no change from current value) (int)
With the suggested command:
sudo modprobe -r sony_laptop
sudo modprobe -v sony_laptop kbd_backlight=0
Output was:
insmod /lib/modules/3.13.0-34-generic/kernel/drivers/platform/x86/sony-laptop.ko kbd_backlight=0
It doesn't seem to affect the keyboard backlight.
And also trying this command:
sudo modprobe -v sony_laptop kbd_backlight_timeout=3 kbd_backlight=0
and doesn't seem to effect the keyboard backlight I also test it after restart laptop, And I didn't see any effect too.
Important : By default, keyboard backlight is off; when I press a key it turns on and after 15 seconds it turns off again. It's the same result on battery and AC power
I followed also http://ubuntuforums.org/showthread.php?t=2139597 and
Keyboard backlighting not working on a Vaio VPCSB11FX but didn't work so.
