Comment 100 for bug 1510344

The same problem on a Dell Latitude E5570:
- keyboard goes on full full-brightness at boot time
- keyboard turns on after screen lock exactly when the screen goes off (even if the keyboard backlight is off)
- the auto turn-off after the specified amount of time (set in the BIOS and visible in the /sys/class/leds/...) is completely dismissed - the keys stay on all the time

$ cat /sys/class/leds/dell\:\:kbd_backlight/stop_timeout
10s