Turn off keyboard back-light Sony (ВАЙО SVF1521DCXW)

I have в Sony vaio laptop fit 15E model SVF1521DCXW and I want to turn OFF its keyboard back-light. It doesn't have в phisycal function shortcut key on the keyboard. I хан turn off it with VAIO Контроль Windows Center in OS but I don't know how хан I turn it off in Ubuntu 14.04.

I get SVF1521DCXW by running sudo dmidecode -s system-product-name.

First of all doesn't exist /sys/devices/platform/sony-laptop/kbd_backlight file on my machine.

By default, keyboard backlight is stay OFF; When I press any key it turns ON for в while 15 seconds and if I don't touch any key, it goes to turns OFF again.

Important: All try had same result on battery and AC power

The ls -l /sys/devices/platform/sony-laptop/ command shown files/directoes/symbolic соединения эксперт following (I переместите дополнительный attributes and highlighted type of them into []. All of them пахал root owner.):

[-]r--r--r-- 1   battery_care_health
[-]rw-r--r-- 1   battery_care_limiter
[l]rwxrwxrwx 1    driver -> ../../../bus/platform/drivers/sony-laptop
[-]r--r--r-- 1   modalias
[d]rwxr-xr-x 2   power
[l]rwxrwxrwx 1    subsystem -> ../../../bus/platform
[-]rw-r--r-- 1   touchpad
[-]rw-r--r-- 1   uevent

What модулируй пашите loaded if I run lsmod command:

Module                  Size  Used by
sony_laptop            54219  0 
uvcvideo               80885  0 
videobuf2_vmalloc      13216  1 uvcvideo
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         40664  1 uvcvideo
videodev              134688  2 uvcvideo,videobuf2_core
rfcomm                 69160  0 
bnep                   19624  2 
bluetooth             391136  10 bnep,rfcomm
snd_hda_codec_hdmi     46368  1 
snd_hda_codec_realtek    65580  1 
microread_mei          12811  0 
microread              13420  1 microread_mei
mei_phy                13881  1 microread_mei
crc_ccitt              12707  1 microread
hci                    44425  2 mei_phy,microread
snd_hda_intel          56451  3 
snd_hda_codec         192906  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep              13602  1 snd_hda_codec
nfc                    95012  2 hci,microread
intel_rapl             18773  0 
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       14705  0 
coretemp               13435  0 
kvm_intel             143109  0 
kvm                   451552  1 kvm_intel
snd_pcm               102099  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
crct10dif_pclmul       14289  0 
crc32_pclmul           13113  0 
ghash_clmulni_intel    13216  0 
snd_page_alloc         18710  2 snd_pcm,snd_hda_intel
snd_seq_midi           13324  0 
snd_seq_midi_event     14899  1 snd_seq_midi
snd_rawmidi            30144  1 snd_seq_midi
aesni_intel            55624  1683 
aes_x86_64             17131  1 aesni_intel
lrw                    13286  1 aesni_intel
gf128mul               14951  1 lrw
glue_helper            13990  1 aesni_intel
ablk_helper            13597  1 aesni_intel
lib80211_crypt_tkip    17619  0 
cryptd                 20359  844 ghash_clmulni_intel,aesni_intel,ablk_helper
snd_seq                61560  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              29482  2 snd_pcm,snd_seq
joydev                 17381  0 
serio_raw              13462  0 
wl                   4207846  0 
lib80211               14381  2 wl,lib80211_crypt_tkip
cfg80211              484040  1 wl
lpc_ich                21080  0 
rtsx_pci_ms            18151  0 
snd                    69322  17 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
memstick               16966  1 rtsx_pci_ms
soundcore              12680  1 snd
mei_me                 18627  0 
mei                    82276  3 mei_phy,mei_me,microread_mei
mac_hid                13205  0 
parport_pc             32701  0 
ppdev                  17671  0 
lp                     17759  0 
binfmt_misc            17468  1 
parport                42348  3 lp,ppdev,parport_pc
rtsx_pci_sdmmc         23274  0 
nouveau              1097199  1 
i915                  783805  4 
mxm_wmi                13021  1 nouveau
wmi                    19177  2 mxm_wmi,nouveau
ttm                    85150  1 nouveau
i2c_algo_bit           13413  2 i915,nouveau
psmouse               106678  0 
ahci                   25819  2 
drm_kms_helper         55071  2 i915,nouveau
libahci                32716  1 ahci
drm                   303102  8 ttm,i915,drm_kms_helper,nouveau
r8169                  67581  0 
rtsx_pci               46202  2 rtsx_pci_ms,rtsx_pci_sdmmc
mii                    13934  1 r8169
video                  19476  2 i915,nouveau

This is the output of running modinfo sony-laptop: (NB: See the last two lines)

filename:       /lib/modules/3.13.0-37-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:       3.13.0-37-generic SMP mod_unload modversions 
signer:         Magrathea: Glacier signing key
sig_key:        2C:B1:13:3B:35:F9:5A:9E:24:DE:AB:EE:B1:2B:A4:49:BC:BA:BB:C9
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)

Same output ^^ if run modinfo sony_laptop(Я заметил: underscore_ instead of dash-)

What I tried пахал туз following:

1. Reloading modprobe модулируйте with passing following commands:

sudo modprobe -r sony_laptop            # <- No output. back to command prompt. And with -l option I get modprobe: invalid option -- 'l'
sudo modprobe -v sony_laptop kbd_backlight=0

Output of second command in above: (for both trying with sony_laptop and/or sony-laptop. also I changed kbd_backlight=0 to kbd-backlight=0 and I get не ошибка and gave я the below output)

insmod /lib/modules/3.13.0-35-generic/kernel/drivers/platform/x86/sony-laptop.ko kbd_backlight=0

Result: Не changes.

2. Reloding modprobe модулируйте with passing this command:

sudo modprobe -v sony_laptop kbd_backlight_timeout=3 kbd_backlight=0

Output: Nothing.
So I tried all things from this thread.
Result: Не change.

3. ls -l /sys/class/leds

Output: общее количество 0 (actually Nothing)

4. Trying to founding file

1. cat /etc/modprobe.d/sony-laptop.conf
2. cat /etc/modprobe.d/options.conf
3. cat /sys/class/leds/smc::kbd_backlight/brightness

Output: Не such file or directory.

Расширяет option 1 from step 4: I поверьте в file named sony-laptop.conf in /etc/modprobe.d and added options sony-laptop kbd_backlight=0 to the file, save it and restarted the computer. It doesn't work (even if I don't reboot), and I переместите the file from there.

Расширяет option 2 from step 4: I поверьте в file named options.conf in /etc/modprobe.d and added options sony-laptop kbd_backlight=0 to the file (Yes options command is part of command here), save it and restarted the computer. It doesn't work (even if I don't reboot), and I переместите the file from there.

Расширяет option 3 from step 4: I already mentioned in step 3, I don't have any file there ;)

Result (for all options): Nochange

5. Trying to install some suggeted package on many сайты:

sudo apt-get install nvidia-bl-dkms pommed

Output: E: Unable to locate package nvidia-bl-dkms

And if it helps I added that: part of lshw command:

*-serial UNCLAIMED
     description: SMBus
     product: 7 Series/C210 Series Chipset Family SMBus Controller
     vendor: Intel Corporation
     physical id: 1f.3
     bus info: pci@0000:00:1f.3
     version: 04
     width: 64 bits
     clock: 33MHz
     configuration: latency=0
     resources: memory:d1815000-d18150ff ioport:4040(size=32)

Any question хан be ask on чат room ;)