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