| 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. |