tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1What: /sys/class/leds/dell::kbd_backlight/als_enabled
2Date: December 2014
3KernelVersion: 3.19
4Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
5 Pali Rohár <pali@kernel.org>
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/als_setting
13Date: December 2014
14KernelVersion: 3.19
15Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
16 Pali Rohár <pali@kernel.org>
17Description:
18 This file allows to specify the on/off threshold value,
19 as reported by the ambient light sensor.
20
21What: /sys/class/leds/dell::kbd_backlight/start_triggers
22Date: December 2014
23KernelVersion: 3.19
24Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
25 Pali Rohár <pali@kernel.org>
26Description:
27 This file allows to control the input triggers that
28 turn on the keyboard backlight illumination that is
29 disabled because of inactivity.
30 Read the file to see the triggers available. The ones
31 enabled are preceded by '+', those disabled by '-'.
32
33 To enable a trigger, write its name preceded by '+' to
34 this file. To disable a trigger, write its name preceded
35 by '-' instead.
36
37 For example, to enable the keyboard as trigger run::
38
39 echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
40
41 To disable it::
42
43 echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
44
45 Note that not all the available triggers can be configured.
46
47What: /sys/class/leds/dell::kbd_backlight/stop_timeout
48Date: December 2014
49KernelVersion: 3.19
50Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
51 Pali Rohár <pali@kernel.org>
52Description:
53 This file allows to specify the interval after which the
54 keyboard illumination is disabled because of inactivity.
55 The timeouts are expressed in seconds, minutes, hours and
56 days, for which the symbols are 's', 'm', 'h' and 'd'
57 respectively.
58
59 To configure the timeout, write to this file a value along
60 with any the above units. If no unit is specified, the value
61 is assumed to be expressed in seconds.
62
63 For example, to set the timeout to 10 minutes run::
64
65 echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout
66
67 Note that when this file is read, the returned value might be
68 expressed in a different unit than the one used when the timeout
69 was set.
70
71 Also note that only some timeouts are supported and that
72 some systems might fall back to a specific timeout in case
73 an invalid timeout is written to this file.