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I am using the latest Xubuntu x64 version as of this posting.. It's installed in dual boot with Windows 10.. the KB Backlight is working when I boot on Windows and from the bios.. The moment It enters the Xubuntu Startup screen the KB Backlight turns off and doesn't turn on.. Thanks in advance for the help..

Output of: ls /sys/class/leds/

input3::capslock 
input3::numlock 
input3::scrolllock 
phy0-led
Mohamed Slama
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im.earl
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2 Answers2

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To enable the backlight:

echo 2 | sudo tee /sys/class/leds/toshiba::kbd_backlight/brightness

The 2 at echo 2 | can be changed to a value between 0 - 3, with 3 being the brightest.

To disable the backlight, enter:

echo 0 | sudo tee /sys/class/leds/toshiba::kbd_backlight/brightness

reference this answer but changing asus to toshiba .

Updated

some people whom report this issue say disabling acpi solve the problem to disable acpi:

  1. open terminal
  2. edit /etc/default/grub
  3. append acpi = off to GRUB_CMDLINE_LINUX_DEFAULT
  4. update-grub
  5. if not working do these steps again and delete acpi = off

if none of these solution work may it's this bug

Community
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Mohamed Slama
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  • Nope.. Does not work..
    eirol@--------:~$ echo 2 | sudo tee /sys/class/leds/toshiba::kbd_backlight/brightness [sudo] password for eirol: tee: '/sys/class/leds/toshiba::kbd_backlight/brightness': No such file or directory 2     – im.earl Jun 01 '16 at 09:37
  • eirol@-----:~$ ls /sys/class/leds/ input3::capslock input3::numlock input3::scrolllock phy0-led

    eirol@-----:~$

     – im.earl Jun 01 '16 at 09:45
  • @EirolJohn i update my answer – Mohamed Slama Jun 01 '16 at 11:35
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try with Fn+Z it worked in my toshiba

Reference found here https://forum.manjaro.org/t/toshiba-backlight-keyboard/25235

ejaenv
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