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