cyroxx Asked: 2018-09-19 10:25:58 +0800 CST2018-09-19 10:25:58 +0800 CST 2018-09-19 10:25:58 +0800 CST Dell keyboard backlight is not working 772 I saw that the keyboard backlight was not working. How can that be fixed? Hardware/OS Dell Latitude E6540 Kubuntu 16.04 (xenial) dell keyboard-backlight 16.04 1 Answers Voted cyroxx 2018-09-19T10:25:58+08:002018-09-19T10:25:58+08:00 You may want to check the brightness settings for the Dell keyboard. The following procedure worked for me: Show the configured brightness: $ cat /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/brightness 0 See the maximum brightness: $ cat /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/max_brightness 4 Set the desired level of brightness (here: 4): $ echo 4 | sudo tee /sys/devices/platform/dell-laptop/leds/dell\:\:kbd_backlight/brightness Slightly related: You might also want to configure the time-out interval for the backlight, using the stop_timeout setting. See also the article How to Configure the Keyboard Backlight Time-Out Interval in Ubuntu Linux in the Dell knowledge base.
You may want to check the brightness settings for the Dell keyboard. The following procedure worked for me:
Show the configured brightness:
See the maximum brightness:
Set the desired level of brightness (here: 4):
Slightly related: You might also want to configure the time-out interval for the backlight, using the
stop_timeoutsetting. See also the article How to Configure the Keyboard Backlight Time-Out Interval in Ubuntu Linux in the Dell knowledge base.