1What: /sys/class/leds/dell::kbd_backlight/als_setting 2Date: December 2014 3KernelVersion: 3.19 4Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, 5 Pali Rohár <pali.rohar@gmail.com> 6Description: 7 This file allows to control the automatic keyboard 8 illumination mode on some systems that have an ambient 9 light sensor. Write 1 to this file to enable the auto 10 mode, 0 to disable it. 11 12What: /sys/class/leds/dell::kbd_backlight/start_triggers 13Date: December 2014 14KernelVersion: 3.19 15Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, 16 Pali Rohár <pali.rohar@gmail.com> 17Description: 18 This file allows to control the input triggers that 19 turn on the keyboard backlight illumination that is 20 disabled because of inactivity. 21 Read the file to see the triggers available. The ones 22 enabled are preceded by '+', those disabled by '-'. 23 24 To enable a trigger, write its name preceded by '+' to 25 this file. To disable a trigger, write its name preceded 26 by '-' instead. 27 28 For example, to enable the keyboard as trigger run: 29 echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers 30 To disable it: 31 echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers 32 33 Note that not all the available triggers can be configured. 34 35What: /sys/class/leds/dell::kbd_backlight/stop_timeout 36Date: December 2014 37KernelVersion: 3.19 38Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, 39 Pali Rohár <pali.rohar@gmail.com> 40Description: 41 This file allows to specify the interval after which the 42 keyboard illumination is disabled because of inactivity. 43 The timeouts are expressed in seconds, minutes, hours and 44 days, for which the symbols are 's', 'm', 'h' and 'd' 45 respectively. 46 47 To configure the timeout, write to this file a value along 48 with any the above units. If no unit is specified, the value 49 is assumed to be expressed in seconds. 50 51 For example, to set the timeout to 10 minutes run: 52 echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout 53 54 Note that when this file is read, the returned value might be 55 expressed in a different unit than the one used when the timeout 56 was set. 57 58 Also note that only some timeouts are supported and that 59 some systems might fall back to a specific timeout in case 60 an invalid timeout is written to this file. 61