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