sysfs-platform-dell-laptop 2.5 KB

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