Ubuntu
unity-settings-daemon package

  1. Bug #1510344
  2. Comment #47

Comment 47 for bug 1510344

Revision history for this message
ficestat (ficestat) wrote :

This workaround worked for me on a Dell Latitude E7450 Ubuntu 16.04 kernel 4.6 RC 4

In the file:
/etc/dbus-1/system.d/org.freedesktop.UPower.conf
change:
    <allow send_destination="org.freedesktop.UPower"
           send_interface="org.freedesktop.UPower.KbdBacklight"/>
to:
    <deny send_destination="org.freedesktop.UPower"
           send_interface="org.freedesktop.UPower.KbdBacklight"/>

and reboot.
Source: https://askubuntu.com/questions/700069/keyboard-backlight-turns-on-after-lock-screen-display-on