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libinput-measure-touchpad-pressure.man

libinput-measure-touchpad-pressure.man 2.1 KB
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  1. .TH libinput-measure-touchpad-pressure "1"
    2. 

  2. .SH NAME
    3. 

  3. libinput\-measure\-touchpad\-pressure \- measure pressure properties of devices
    4. 

  4. .SH SYNOPSIS
    5. 

  5. .B libinput measure touchpad\-pressure [\-\-help] [options]
    6. 

  6. [\fI/dev/input/event0\fI]
    7. 

  7. .SH DESCRIPTION
    8. 

  8. .PP
    9. 

  9. The
    10. 

  10. .B "libinput measure touchpad\-pressure"
    11. 

  11. tool measures the pressure of touches on a touchpad. This is
    12. 

  12. an interactive tool. When executed, the tool will prompt the user to
    13. 

  13. interact with the touchpad. On termination, the tool prints a summary of the
    14. 

  14. pressure values seen. This data should be attached to any
    15. 

  15. pressure\-related bug report.
    16. 

  16. .PP
    17. 

  17. For a full description on how libinput's pressure-to-click behavior works, see
    18. 

  18. the online documentation here:
    19. 

  19. .I https://wayland.freedesktop.org/libinput/doc/latest/touchpad-pressure.html
    20. 

  20. and
    21. 

  21. .I https://wayland.freedesktop.org/libinput/doc/latest/palm-detection.html
    22. 

  22. .PP
    23. 

  23. This is a debugging tool only, its output may change at any time. Do not
    24. 

  24. rely on the output.
    25. 

  25. .PP
    26. 

  26. This tool usually needs to be run as root to have access to the
    27. 

  27. /dev/input/eventX nodes.
    28. 

  28. .SH OPTIONS
    29. 

  29. If a device node is given, this tool opens that device node. Otherwise, this
    30. 

  30. tool searches for the first node that looks like a touchpad and uses that
    31. 

  31. node.
    32. 

  32. .TP 8
    33. 

  33. .B \-\-help
    34. 

  34. Print help
    35. 

  35. .TP 8
    36. 

  36. .B \-\-touch\-thresholds=\fI"down:up"\fR
    37. 

  37. Set the logical touch pressure thresholds to
    38. 

  38. .I down
    39. 

  39. and
    40. 

  40. .I up,
    41. 

  41. respectively. When a touch exceeds the pressure in
    42. 

  42. .I down
    43. 

  43. it is considered logically down. If a touch is logically down and goes below
    44. 

  44. the pressure in
    45. 

  45. .I up,
    46. 

  46. it is considered logically up. The thresholds have to be in
    47. 

  47. device-specific pressure values and it is required that
    48. 

  48. .I down
    49. 

  49. >=
    50. 

  50. .I up.
    51. 

  51. .TP 8
    52. 

  52. .B \-\-palm\-threshold=\fIN\fR
    53. 

  53. Assume a palm threshold of
    54. 

  54. .I N.
    55. 

  55. The threshold has to be in device-specific pressure values.
    56. 

  56. .TP 8
    57. 

  57. .B \-\-thumb\-threshold=\fIN\fR
    58. 

  58. Assume a thumb threshold of
    59. 

  59. .I N.
    60. 

  60. The threshold has to be in device-specific pressure values.
    61. 

  61. .PP
    62. 

  62. If the touch-thresholds or the palm-threshold are not provided,
    63. 

  63. this tool uses the thresholds provided by the device quirks (if any) or the
    64. 

  64. built-in defaults.
    65. 

  65. .SH LIBINPUT
    66. 

  66. Part of the
    67. 

  67. .B libinput(1)
    68. 

  68. suite
    69.