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- What: /sys/devices/platform/i8042/.../sensitivity
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Trackpoint sensitivity.
- What: /sys/devices/platform/i8042/.../intertia
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Negative inertia factor. High values cause the cursor to
- snap backward when the trackpoint is released.
- What: /sys/devices/platform/i8042/.../reach
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Backup range for z-axis press.
- What: /sys/devices/platform/i8042/.../draghys
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) The drag hysteresis controls how hard it is to drag with
- z-axis pressed.
- What: /sys/devices/platform/i8042/.../mindrag
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Minimum amount of force needed to trigger dragging.
- What: /sys/devices/platform/i8042/.../speed
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Speed of the trackpoint cursor.
- What: /sys/devices/platform/i8042/.../thresh
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Minimum value for z-axis force required to trigger a press
- or release, relative to the running average.
- What: /sys/devices/platform/i8042/.../upthresh
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) The offset from the running average required to generate a
- select (click) on z-axis on release.
- What: /sys/devices/platform/i8042/.../ztime
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) This attribute determines how sharp a press has to be in
- order to be recognized.
- What: /sys/devices/platform/i8042/.../jenks
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Minimum curvature in degrees required to generate a double
- click without a release.
- What: /sys/devices/platform/i8042/.../skipback
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) When the skipback bit is set, backup cursor movement during
- releases from drags will be suppressed. The default value for
- this bit is 0.
- What: /sys/devices/platform/i8042/.../ext_dev
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Disable (0) or enable (1) external pointing device.
- What: /sys/devices/platform/i8042/.../press_to_select
- Date: Aug, 2005
- KernelVersion: 2.6.14
- Contact: [email protected]
- Description:
- (RW) Writing a value of 1 to this file will enable the Press to
- Select functions like tapping the control stick to simulate a
- left click, and writing 0 will disable it.
- What: /sys/devices/platform/i8042/.../drift_time
- Date: Dec, 2014
- KernelVersion: 3.19
- Contact: [email protected]
- Description:
- (RW) This parameter controls the period of time to test for a
- ‘hands off’ condition (i.e. when no force is applied) before a
- drift (noise) calibration occurs.
- IBM Trackpoints have a feature to compensate for drift by
- recalibrating themselves periodically. By default, if for 0.5
- seconds there is no change in position, it's used as the new
- zero. This duration is too low. Often, the calibration happens
- when the trackpoint is in fact being used.
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