1 What: /sys/class/leds/dell::kbd_backlight/als_setting
4 Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
5 Pali Rohár <pali.rohar@gmail.com>
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.
12 What: /sys/class/leds/dell::kbd_backlight/start_triggers
15 Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
16 Pali Rohár <pali.rohar@gmail.com>
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 '-'.
24 To enable a trigger, write its name preceded by '+' to
25 this file. To disable a trigger, write its name preceded
28 For example, to enable the keyboard as trigger run:
29 echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
31 echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
33 Note that not all the available triggers can be configured.
35 What: /sys/class/leds/dell::kbd_backlight/stop_timeout
38 Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
39 Pali Rohár <pali.rohar@gmail.com>
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'
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.
51 For example, to set the timeout to 10 minutes run:
52 echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout
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
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.