| What: /sys/class/leds/dell::kbd_backlight/als_enabled |
| Date: December 2014 |
| KernelVersion: 3.19 |
| Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, |
| Pali Rohár <pali@kernel.org> |
| Description: |
| This file allows to control the automatic keyboard |
| illumination mode on some systems that have an ambient |
| light sensor. Write 1 to this file to enable the auto |
| mode, 0 to disable it. |
| |
| What: /sys/class/leds/dell::kbd_backlight/als_setting |
| Date: December 2014 |
| KernelVersion: 3.19 |
| Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, |
| Pali Rohár <pali@kernel.org> |
| Description: |
| This file allows to specify the on/off threshold value, |
| as reported by the ambient light sensor. |
| |
| What: /sys/class/leds/dell::kbd_backlight/start_triggers |
| Date: December 2014 |
| KernelVersion: 3.19 |
| Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, |
| Pali Rohár <pali@kernel.org> |
| Description: |
| This file allows to control the input triggers that |
| turn on the keyboard backlight illumination that is |
| disabled because of inactivity. |
| Read the file to see the triggers available. The ones |
| enabled are preceded by '+', those disabled by '-'. |
| |
| To enable a trigger, write its name preceded by '+' to |
| this file. To disable a trigger, write its name preceded |
| by '-' instead. |
| |
| For example, to enable the keyboard as trigger run:: |
| |
| echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers |
| |
| To disable it:: |
| |
| echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers |
| |
| Note that not all the available triggers can be configured. |
| |
| What: /sys/class/leds/dell::kbd_backlight/stop_timeout |
| Date: December 2014 |
| KernelVersion: 3.19 |
| Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, |
| Pali Rohár <pali@kernel.org> |
| Description: |
| This file allows to specify the interval after which the |
| keyboard illumination is disabled because of inactivity. |
| The timeouts are expressed in seconds, minutes, hours and |
| days, for which the symbols are 's', 'm', 'h' and 'd' |
| respectively. |
| |
| To configure the timeout, write to this file a value along |
| with any the above units. If no unit is specified, the value |
| is assumed to be expressed in seconds. |
| |
| For example, to set the timeout to 10 minutes run:: |
| |
| echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout |
| |
| Note that when this file is read, the returned value might be |
| expressed in a different unit than the one used when the timeout |
| was set. |
| |
| Also note that only some timeouts are supported and that |
| some systems might fall back to a specific timeout in case |
| an invalid timeout is written to this file. |
