1aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../sensitivity 2aebb47d4SAishwarya PantDate: Aug, 2005 3aebb47d4SAishwarya PantKernelVersion: 2.6.14 4aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 5aebb47d4SAishwarya PantDescription: 6aebb47d4SAishwarya Pant (RW) Trackpoint sensitivity. 7aebb47d4SAishwarya Pant 8aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../intertia 9aebb47d4SAishwarya PantDate: Aug, 2005 10aebb47d4SAishwarya PantKernelVersion: 2.6.14 11aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 12aebb47d4SAishwarya PantDescription: 13aebb47d4SAishwarya Pant (RW) Negative inertia factor. High values cause the cursor to 14aebb47d4SAishwarya Pant snap backward when the trackpoint is released. 15aebb47d4SAishwarya Pant 16aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../reach 17aebb47d4SAishwarya PantDate: Aug, 2005 18aebb47d4SAishwarya PantKernelVersion: 2.6.14 19aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 20aebb47d4SAishwarya PantDescription: 21aebb47d4SAishwarya Pant (RW) Backup range for z-axis press. 22aebb47d4SAishwarya Pant 23aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../draghys 24aebb47d4SAishwarya PantDate: Aug, 2005 25aebb47d4SAishwarya PantKernelVersion: 2.6.14 26aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 27aebb47d4SAishwarya PantDescription: 28aebb47d4SAishwarya Pant (RW) The drag hysteresis controls how hard it is to drag with 29aebb47d4SAishwarya Pant z-axis pressed. 30aebb47d4SAishwarya Pant 31aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../mindrag 32aebb47d4SAishwarya PantDate: Aug, 2005 33aebb47d4SAishwarya PantKernelVersion: 2.6.14 34aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 35aebb47d4SAishwarya PantDescription: 36aebb47d4SAishwarya Pant (RW) Minimum amount of force needed to trigger dragging. 37aebb47d4SAishwarya Pant 38aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../speed 39aebb47d4SAishwarya PantDate: Aug, 2005 40aebb47d4SAishwarya PantKernelVersion: 2.6.14 41aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 42aebb47d4SAishwarya PantDescription: 43aebb47d4SAishwarya Pant (RW) Speed of the trackpoint cursor. 44aebb47d4SAishwarya Pant 45aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../thresh 46aebb47d4SAishwarya PantDate: Aug, 2005 47aebb47d4SAishwarya PantKernelVersion: 2.6.14 48aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 49aebb47d4SAishwarya PantDescription: 50aebb47d4SAishwarya Pant (RW) Minimum value for z-axis force required to trigger a press 51aebb47d4SAishwarya Pant or release, relative to the running average. 52aebb47d4SAishwarya Pant 53aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../upthresh 54aebb47d4SAishwarya PantDate: Aug, 2005 55aebb47d4SAishwarya PantKernelVersion: 2.6.14 56aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 57aebb47d4SAishwarya PantDescription: 58aebb47d4SAishwarya Pant (RW) The offset from the running average required to generate a 59aebb47d4SAishwarya Pant select (click) on z-axis on release. 60aebb47d4SAishwarya Pant 61aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../ztime 62aebb47d4SAishwarya PantDate: Aug, 2005 63aebb47d4SAishwarya PantKernelVersion: 2.6.14 64aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 65aebb47d4SAishwarya PantDescription: 66aebb47d4SAishwarya Pant (RW) This attribute determines how sharp a press has to be in 67aebb47d4SAishwarya Pant order to be recognized. 68aebb47d4SAishwarya Pant 69aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../jenks 70aebb47d4SAishwarya PantDate: Aug, 2005 71aebb47d4SAishwarya PantKernelVersion: 2.6.14 72aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 73aebb47d4SAishwarya PantDescription: 74aebb47d4SAishwarya Pant (RW) Minimum curvature in degrees required to generate a double 75aebb47d4SAishwarya Pant click without a release. 76aebb47d4SAishwarya Pant 77aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../skipback 78aebb47d4SAishwarya PantDate: Aug, 2005 79aebb47d4SAishwarya PantKernelVersion: 2.6.14 80aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 81aebb47d4SAishwarya PantDescription: 82aebb47d4SAishwarya Pant (RW) When the skipback bit is set, backup cursor movement during 83aebb47d4SAishwarya Pant releases from drags will be suppressed. The default value for 84aebb47d4SAishwarya Pant this bit is 0. 85aebb47d4SAishwarya Pant 86aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../ext_dev 87aebb47d4SAishwarya PantDate: Aug, 2005 88aebb47d4SAishwarya PantKernelVersion: 2.6.14 89aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 90aebb47d4SAishwarya PantDescription: 91aebb47d4SAishwarya Pant (RW) Disable (0) or enable (1) external pointing device. 92aebb47d4SAishwarya Pant 93aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../press_to_select 94aebb47d4SAishwarya PantDate: Aug, 2005 95aebb47d4SAishwarya PantKernelVersion: 2.6.14 96aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 97aebb47d4SAishwarya PantDescription: 98aebb47d4SAishwarya Pant (RW) Writing a value of 1 to this file will enable the Press to 99aebb47d4SAishwarya Pant Select functions like tapping the control stick to simulate a 100aebb47d4SAishwarya Pant left click, and writing 0 will disable it. 101aebb47d4SAishwarya Pant 102aebb47d4SAishwarya PantWhat: /sys/devices/platform/i8042/.../drift_time 103aebb47d4SAishwarya PantDate: Dec, 2014 104aebb47d4SAishwarya PantKernelVersion: 3.19 105aebb47d4SAishwarya PantContact: linux-input@vger.kernel.org 106aebb47d4SAishwarya PantDescription: 107aebb47d4SAishwarya Pant (RW) This parameter controls the period of time to test for a 108aebb47d4SAishwarya Pant ‘hands off’ condition (i.e. when no force is applied) before a 109aebb47d4SAishwarya Pant drift (noise) calibration occurs. 110aebb47d4SAishwarya Pant 111aebb47d4SAishwarya Pant IBM Trackpoints have a feature to compensate for drift by 112aebb47d4SAishwarya Pant recalibrating themselves periodically. By default, if for 0.5 113aebb47d4SAishwarya Pant seconds there is no change in position, it's used as the new 114aebb47d4SAishwarya Pant zero. This duration is too low. Often, the calibration happens 115aebb47d4SAishwarya Pant when the trackpoint is in fact being used. 116