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#1 2019-09-20 04:39:57

debendraoli
Member
Registered: 2019-05-19
Posts: 5

Disable Dell Laptop keyboard back light.

Hello guys,

My laptop does not support keyboard back light but the system is trying to set up the brightness every minute, I can see clearly on system  logs.

leds dell::kbd_backlight: Setting an LED's brightness failed (-8)

I want to turn it off completely from kernel level so that system never tries again.

Please suggest.

Thanks.

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#2 2019-09-21 20:12:59

Swiggles
Member
Registered: 2014-08-02
Posts: 260

Re: Disable Dell Laptop keyboard back light.

Have you tried setting the timeout to 0?

echo 0 > /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/stop_timeout

The brightness to 0?

echo 0 > /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/brightness

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#3 2019-09-24 15:41:59

debendraoli
Member
Registered: 2019-05-19
Posts: 5

Re: Disable Dell Laptop keyboard back light.

Nope, it didn't work.

Executing following commands:

cat /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/stop_timeout

Yields:

No such device or address

Editing or echoing the file with the value "0"

/sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight

will be reverted back again to "1" instantly.

Last edited by debendraoli (2019-09-29 12:58:04)

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