| What: /sys/devices/platform/i8042/.../sensitivity |
| Date: Aug, 2005 |
| KernelVersion: 2.6.14 |
| Contact: linux-input@vger.kernel.org |
| Description: |
| (RW) Trackpoint sensitivity. |
| |
| What: /sys/devices/platform/i8042/.../intertia |
| Date: Aug, 2005 |
| KernelVersion: 2.6.14 |
| Contact: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| Description: |
| (RW) Backup range for z-axis press. |
| |
| What: /sys/devices/platform/i8042/.../draghys |
| Date: Aug, 2005 |
| KernelVersion: 2.6.14 |
| Contact: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| Description: |
| (RW) Minimum amount of force needed to trigger dragging. |
| |
| What: /sys/devices/platform/i8042/.../speed |
| Date: Aug, 2005 |
| KernelVersion: 2.6.14 |
| Contact: linux-input@vger.kernel.org |
| Description: |
| (RW) Speed of the trackpoint cursor. |
| |
| What: /sys/devices/platform/i8042/.../thresh |
| Date: Aug, 2005 |
| KernelVersion: 2.6.14 |
| Contact: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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: linux-input@vger.kernel.org |
| 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. |
