sysfs-devices-platform-trackpoint 3.5 KB

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  1. What: /sys/devices/platform/i8042/.../sensitivity
  2. Date: Aug, 2005
  3. KernelVersion: 2.6.14
  4. Contact: linux-input@vger.kernel.org
  5. Description:
  6. (RW) Trackpoint sensitivity.
  7. What: /sys/devices/platform/i8042/.../intertia
  8. Date: Aug, 2005
  9. KernelVersion: 2.6.14
  10. Contact: linux-input@vger.kernel.org
  11. Description:
  12. (RW) Negative inertia factor. High values cause the cursor to
  13. snap backward when the trackpoint is released.
  14. What: /sys/devices/platform/i8042/.../reach
  15. Date: Aug, 2005
  16. KernelVersion: 2.6.14
  17. Contact: linux-input@vger.kernel.org
  18. Description:
  19. (RW) Backup range for z-axis press.
  20. What: /sys/devices/platform/i8042/.../draghys
  21. Date: Aug, 2005
  22. KernelVersion: 2.6.14
  23. Contact: linux-input@vger.kernel.org
  24. Description:
  25. (RW) The drag hysteresis controls how hard it is to drag with
  26. z-axis pressed.
  27. What: /sys/devices/platform/i8042/.../mindrag
  28. Date: Aug, 2005
  29. KernelVersion: 2.6.14
  30. Contact: linux-input@vger.kernel.org
  31. Description:
  32. (RW) Minimum amount of force needed to trigger dragging.
  33. What: /sys/devices/platform/i8042/.../speed
  34. Date: Aug, 2005
  35. KernelVersion: 2.6.14
  36. Contact: linux-input@vger.kernel.org
  37. Description:
  38. (RW) Speed of the trackpoint cursor.
  39. What: /sys/devices/platform/i8042/.../thresh
  40. Date: Aug, 2005
  41. KernelVersion: 2.6.14
  42. Contact: linux-input@vger.kernel.org
  43. Description:
  44. (RW) Minimum value for z-axis force required to trigger a press
  45. or release, relative to the running average.
  46. What: /sys/devices/platform/i8042/.../upthresh
  47. Date: Aug, 2005
  48. KernelVersion: 2.6.14
  49. Contact: linux-input@vger.kernel.org
  50. Description:
  51. (RW) The offset from the running average required to generate a
  52. select (click) on z-axis on release.
  53. What: /sys/devices/platform/i8042/.../ztime
  54. Date: Aug, 2005
  55. KernelVersion: 2.6.14
  56. Contact: linux-input@vger.kernel.org
  57. Description:
  58. (RW) This attribute determines how sharp a press has to be in
  59. order to be recognized.
  60. What: /sys/devices/platform/i8042/.../jenks
  61. Date: Aug, 2005
  62. KernelVersion: 2.6.14
  63. Contact: linux-input@vger.kernel.org
  64. Description:
  65. (RW) Minimum curvature in degrees required to generate a double
  66. click without a release.
  67. What: /sys/devices/platform/i8042/.../skipback
  68. Date: Aug, 2005
  69. KernelVersion: 2.6.14
  70. Contact: linux-input@vger.kernel.org
  71. Description:
  72. (RW) When the skipback bit is set, backup cursor movement during
  73. releases from drags will be suppressed. The default value for
  74. this bit is 0.
  75. What: /sys/devices/platform/i8042/.../ext_dev
  76. Date: Aug, 2005
  77. KernelVersion: 2.6.14
  78. Contact: linux-input@vger.kernel.org
  79. Description:
  80. (RW) Disable (0) or enable (1) external pointing device.
  81. What: /sys/devices/platform/i8042/.../press_to_select
  82. Date: Aug, 2005
  83. KernelVersion: 2.6.14
  84. Contact: linux-input@vger.kernel.org
  85. Description:
  86. (RW) Writing a value of 1 to this file will enable the Press to
  87. Select functions like tapping the control stick to simulate a
  88. left click, and writing 0 will disable it.
  89. What: /sys/devices/platform/i8042/.../drift_time
  90. Date: Dec, 2014
  91. KernelVersion: 3.19
  92. Contact: linux-input@vger.kernel.org
  93. Description:
  94. (RW) This parameter controls the period of time to test for a
  95. ‘hands off’ condition (i.e. when no force is applied) before a
  96. drift (noise) calibration occurs.
  97. IBM Trackpoints have a feature to compensate for drift by
  98. recalibrating themselves periodically. By default, if for 0.5
  99. seconds there is no change in position, it's used as the new
  100. zero. This duration is too low. Often, the calibration happens
  101. when the trackpoint is in fact being used.