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After reading dozens of other posts and nothing seems to work, I've located "keyboard backlight" in the /sys/module/sony_laptop/parameters/ module but don't know how to get it to switch on.

I've downloaded the Sony VAIO control center for Linux here but don't know how to use it to enable the keyboard backlight. Can anyone help with that please?

I feel so close yet so far away. I've been trying to solve this problem for many days and hours so any help would be much appreciated.

  • Changing kbd_backlight file works but the problem remains after rebooting – gocen Jun 11 at 22:04
  • Yes, my experience exactly. – Alan Jun 12 at 23:36
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I found it. Open nautilus first with

sudo nautilus

Navigate to

/sys/devices/platform/sony-laptop

There is a file called kbd_backlight

Open it, there should be a 0 or a -1. Edit it to just leave a 1. Done. I replace for a 0 and save, backlight instantly turns off, change again to 1 and instantly on. No reboot needed. Hope it helps.

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  • it's easier to use the terminal for that ;) – damadam Nov 27 '19 at 13:00
  • Ok. Go ahead and post the fix entirely for terminal. I proposed it this way, plain and simple – NotNamed420 Nov 28 '19 at 19:24
  • I tried that but when I changed the value, I got an error message that wouldn't let me save: Could not save the file “/sys/module/sony_laptop/parameters/kbd_backlight”. You do not have the permissions necessary to save the file. Please check that you typed the location correctly and try again. – Alan Nov 29 '19 at 22:20
  • I entered the correct password after entering sudo nautilus then got the above. – Alan Nov 30 '19 at 2:37

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