1*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../sensitivity 2*4882a593SmuzhiyunDate: Aug, 2005 3*4882a593SmuzhiyunKernelVersion: 2.6.14 4*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 5*4882a593SmuzhiyunDescription: 6*4882a593Smuzhiyun (RW) Trackpoint sensitivity. 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../intertia 9*4882a593SmuzhiyunDate: Aug, 2005 10*4882a593SmuzhiyunKernelVersion: 2.6.14 11*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 12*4882a593SmuzhiyunDescription: 13*4882a593Smuzhiyun (RW) Negative inertia factor. High values cause the cursor to 14*4882a593Smuzhiyun snap backward when the trackpoint is released. 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../reach 17*4882a593SmuzhiyunDate: Aug, 2005 18*4882a593SmuzhiyunKernelVersion: 2.6.14 19*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 20*4882a593SmuzhiyunDescription: 21*4882a593Smuzhiyun (RW) Backup range for z-axis press. 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../draghys 24*4882a593SmuzhiyunDate: Aug, 2005 25*4882a593SmuzhiyunKernelVersion: 2.6.14 26*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 27*4882a593SmuzhiyunDescription: 28*4882a593Smuzhiyun (RW) The drag hysteresis controls how hard it is to drag with 29*4882a593Smuzhiyun z-axis pressed. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../mindrag 32*4882a593SmuzhiyunDate: Aug, 2005 33*4882a593SmuzhiyunKernelVersion: 2.6.14 34*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 35*4882a593SmuzhiyunDescription: 36*4882a593Smuzhiyun (RW) Minimum amount of force needed to trigger dragging. 37*4882a593Smuzhiyun 38*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../speed 39*4882a593SmuzhiyunDate: Aug, 2005 40*4882a593SmuzhiyunKernelVersion: 2.6.14 41*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 42*4882a593SmuzhiyunDescription: 43*4882a593Smuzhiyun (RW) Speed of the trackpoint cursor. 44*4882a593Smuzhiyun 45*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../thresh 46*4882a593SmuzhiyunDate: Aug, 2005 47*4882a593SmuzhiyunKernelVersion: 2.6.14 48*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 49*4882a593SmuzhiyunDescription: 50*4882a593Smuzhiyun (RW) Minimum value for z-axis force required to trigger a press 51*4882a593Smuzhiyun or release, relative to the running average. 52*4882a593Smuzhiyun 53*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../upthresh 54*4882a593SmuzhiyunDate: Aug, 2005 55*4882a593SmuzhiyunKernelVersion: 2.6.14 56*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 57*4882a593SmuzhiyunDescription: 58*4882a593Smuzhiyun (RW) The offset from the running average required to generate a 59*4882a593Smuzhiyun select (click) on z-axis on release. 60*4882a593Smuzhiyun 61*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../ztime 62*4882a593SmuzhiyunDate: Aug, 2005 63*4882a593SmuzhiyunKernelVersion: 2.6.14 64*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 65*4882a593SmuzhiyunDescription: 66*4882a593Smuzhiyun (RW) This attribute determines how sharp a press has to be in 67*4882a593Smuzhiyun order to be recognized. 68*4882a593Smuzhiyun 69*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../jenks 70*4882a593SmuzhiyunDate: Aug, 2005 71*4882a593SmuzhiyunKernelVersion: 2.6.14 72*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 73*4882a593SmuzhiyunDescription: 74*4882a593Smuzhiyun (RW) Minimum curvature in degrees required to generate a double 75*4882a593Smuzhiyun click without a release. 76*4882a593Smuzhiyun 77*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../skipback 78*4882a593SmuzhiyunDate: Aug, 2005 79*4882a593SmuzhiyunKernelVersion: 2.6.14 80*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 81*4882a593SmuzhiyunDescription: 82*4882a593Smuzhiyun (RW) When the skipback bit is set, backup cursor movement during 83*4882a593Smuzhiyun releases from drags will be suppressed. The default value for 84*4882a593Smuzhiyun this bit is 0. 85*4882a593Smuzhiyun 86*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../ext_dev 87*4882a593SmuzhiyunDate: Aug, 2005 88*4882a593SmuzhiyunKernelVersion: 2.6.14 89*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 90*4882a593SmuzhiyunDescription: 91*4882a593Smuzhiyun (RW) Disable (0) or enable (1) external pointing device. 92*4882a593Smuzhiyun 93*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../press_to_select 94*4882a593SmuzhiyunDate: Aug, 2005 95*4882a593SmuzhiyunKernelVersion: 2.6.14 96*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 97*4882a593SmuzhiyunDescription: 98*4882a593Smuzhiyun (RW) Writing a value of 1 to this file will enable the Press to 99*4882a593Smuzhiyun Select functions like tapping the control stick to simulate a 100*4882a593Smuzhiyun left click, and writing 0 will disable it. 101*4882a593Smuzhiyun 102*4882a593SmuzhiyunWhat: /sys/devices/platform/i8042/.../drift_time 103*4882a593SmuzhiyunDate: Dec, 2014 104*4882a593SmuzhiyunKernelVersion: 3.19 105*4882a593SmuzhiyunContact: linux-input@vger.kernel.org 106*4882a593SmuzhiyunDescription: 107*4882a593Smuzhiyun (RW) This parameter controls the period of time to test for a 108*4882a593Smuzhiyun ‘hands off’ condition (i.e. when no force is applied) before a 109*4882a593Smuzhiyun drift (noise) calibration occurs. 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun IBM Trackpoints have a feature to compensate for drift by 112*4882a593Smuzhiyun recalibrating themselves periodically. By default, if for 0.5 113*4882a593Smuzhiyun seconds there is no change in position, it's used as the new 114*4882a593Smuzhiyun zero. This duration is too low. Often, the calibration happens 115*4882a593Smuzhiyun when the trackpoint is in fact being used. 116