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无法使用 xinput-calibrator 校准触摸屏

tag-icon • tag-icon xorg touchscreen xinput evdev
无法使用 xinput-calibrator 校准触摸屏

我正在尝试校准 Ubuntu 20.04（带 Xorg 的服务器）的旧触摸屏。有问题的触摸屏是 General Touch RTL224。开箱后，我可以插入 USB 触摸屏，它会被识别，点击屏幕也会有效果。无论我在物理屏幕上点击什么位置，当前的触摸输入都只显示在左上角（距离侧面和顶部边缘不超过 100 像素）——并且 Y 输入（上/下）是反转的。我相当有信心我可以修复 Y 输入反转的问题；我目前只专注于让输入显示在整个屏幕上。

运行时有以下属性xinput list-props：

Device 'USB Touchscreen 0dfc:0001':
        Device Enabled (147):   1
        Coordinate Transformation Matrix (149): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Calibration Matrix (302):      1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Calibration Matrix Default (303):      1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Send Events Modes Available (267):     1, 0
        libinput Send Events Mode Enabled (268):        0, 0
        libinput Send Events Mode Enabled Default (269):        0, 0
        Device Node (270):      "/dev/input/event7"
        Device Product ID (271):        3580, 1

我尝试运行xinput_calibrator -v并得到以下输出

DEBUG: XInputExtension version is 2.3
DEBUG: Skipping virtual master devices and devices without axis valuators.
DEBUG: Skipping device 'Virtual core XTEST pointer' id=4, does not report Absolute events.
DEBUG: Skipping device 'Logitech K400' id=9, does not report Absolute events.
DEBUG: Selected device: USB Touchscreen 0dfc:0001
DEBUG: Not usbtouchscreen calibrator: Not a usbtouchscreen device
DEBUG: Not evdev calibrator: Evdev: invalid "Evdev Axis Calibration" property format
Calibrating standard Xorg driver "USB Touchscreen 0dfc:0001"
        current calibration values: min_x=0, max_x=65535 and min_y=0, max_y=65535
        If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).
DEBUG: Found that 'USB Touchscreen 0dfc:0001' is a sysfs name.
DEBUG: Adding click 0 (X=27, Y=40)
DEBUG: Adding click 1 (X=72, Y=39)
DEBUG: Adding click 2 (X=26, Y=22)
DEBUG: Adding click 3 (X=72, Y=22)
        --> Making the calibration permanent <--
DEBUG: Found that 'USB Touchscreen 0dfc:0001' is a sysfs name.
  copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf' (/usr/share/X11/xorg.conf.d/ in some distro's)
Section "InputClass"
        Identifier      "calibration"
        MatchProduct    "USB Touchscreen 0dfc:0001"
        Option  "MinX"  "738"
        Option  "MaxX"  "3104"
        Option  "MinY"  "2647"
        Option  "MaxY"  "1191"
        Option  "SwapXY"        "0" # unless it was already set to 1
        Option  "InvertX"       "0"  # unless it was already set
        Option  "InvertY"       "0"  # unless it was already set
EndSection

如果我复制代码片段并创建文件，/usr/share/X11/xorg.conf.d/99-calibration.conf重启后似乎没有任何变化。

我曾尝试切换到 evdev，但没有成功 —— 无论如何这似乎不被推荐。

我可以运行sudo evtest，并且得到范围在 ~400 和 ~1550 之间的 X 值，范围在 ~610 和 ~1325 之间的 Y 值。这表明触摸屏本身没有问题 - 只是将输入转换为屏幕上的像素坐标存在问题。

还有其他调试步骤吗？设置此触摸屏时我是否还缺少其他东西？我已经设置了类似的触摸屏，它们似乎开箱即用。

答案1

我能够使用 reinderien 的 xcalibrate 校准工具对其进行校准。该工具可在 GitHub 上找到：https://github.com/reinderien/xcalibrate

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