我在 Dell Inspiron 15 7591 2-in-1 上运行 Ubuntu 20.04。笔记本电脑配有一支触控笔，即 Dell PN350M Active Pen，不幸的是，它在我的系统下无法正常工作。我发现这支笔使用 Microsoft Pen 协议与我的设备配对。以下是一些可能有助于解决此问题的输出。
我发现可以sudo evtest完美显示压力读数，但是xinput --test根本没有显示压力读数，并且尖端被视为按钮 1。
sudo evtest
[sudo] password for parth:
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: Lid Switch
/dev/input/event1: Power Button
/dev/input/event2: Sleep Button
/dev/input/event3: AT Translated Set 2 keyboard
/dev/input/event4: Integrated_Webcam_HD: Integrate
/dev/input/event5: DELL0908:00 04F3:30E3 Mouse
/dev/input/event6: Dell WMI hotkeys
/dev/input/event7: Intel HID events
/dev/input/event8: Intel HID 5 button array
/dev/input/event9: PS/2 Generic Mouse
/dev/input/event10: 2.4G Mouse
/dev/input/event11: 2.4G Mouse
/dev/input/event12: DELL0908:00 04F3:30E3 Touchpad
/dev/input/event13: Video Bus
/dev/input/event14: Video Bus
/dev/input/event15: CUST0000:00 27C6:0118
/dev/input/event16: CUST0000:00 27C6:0118 Stylus
/dev/input/event17: CUST0000:00 27C6:0118 UNKNOWN
/dev/input/event18: sof-hda-dsp Headphone Mic
/dev/input/event19: sof-hda-dsp HDMI/DP,pcm=3
/dev/input/event20: sof-hda-dsp HDMI/DP,pcm=4
/dev/input/event21: sof-hda-dsp HDMI/DP,pcm=5
Select the device event number [0-21]: 16
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x27c6 product 0x118 version 0x100
Input device name: "CUST0000:00 27C6:0118 Stylus"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event type 3 (EV_ABS)
Event code 47 (ABS_MT_SLOT)
Value 0
Min 0
Max 9
Event code 53 (ABS_MT_POSITION_X)
Value 0
Min 0
Max 5760
Resolution 17
Event code 54 (ABS_MT_POSITION_Y)
Value 0
Min 0
Max 3240
Resolution 17
Event code 57 (ABS_MT_TRACKING_ID)
Value 0
Min 0
Max 65535
Event code 58 (ABS_MT_PRESSURE)
Value 0
Min 0
Max 1023
Event code 59 (ABS_MT_DISTANCE)
Value 0
Min 0
Max 1
Properties:
Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)
Event: time 1599396868.187587, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value 43
Event: time 1599396868.187587, type 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 3767
Event: time 1599396868.187587, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 1597
Event: time 1599396868.187587, -------------- SYN_REPORT ------------
Event: time 1599396868.189591, type 3 (EV_ABS), code 59 (ABS_MT_DISTANCE), value 0
Event: time 1599396868.189591, type 3 (EV_ABS), code 58 (ABS_MT_PRESSURE), value 11
Event: time 1599396868.189591, -------------- SYN_REPORT ------------
xinput --test 15
motion a[0]=44467 a[1]=32959
button press 1 a[0]=44467 a[1]=32959
motion a[0]=44467 a[1]=32939
motion a[0]=44490 a[1]=32919
motion a[0]=44501 a[1]=32878
motion a[0]=44524 a[1]=32858
motion a[0]=44546 a[1]=32818
motion a[0]=44592 a[1]=32757
motion a[0]=44626 a[1]=32716
motion a[0]=44672 a[1]=32676
motion a[0]=44717 a[1]=32656
motion a[0]=44774 a[1]=32615
motion a[0]=44831 a[1]=32595
motion a[0]=44888 a[1]=32575
motion a[0]=44956 a[1]=32575
motion a[0]=45013 a[1]=32575
motion a[0]=45070 a[1]=32575
motion a[0]=45127 a[1]=32555
motion a[0]=45195 a[1]=32555
motion a[0]=45252 a[1]=32534
motion a[0]=45309 a[1]=32514
motion a[0]=45366 a[1]=32494
motion a[0]=45422 a[1]=32454
motion a[0]=45491 a[1]=32433
motion a[0]=45548 a[1]=32413
motion a[0]=45616 a[1]=32393
motion a[0]=45695 a[1]=32373
motion a[0]=45775 a[1]=32332
motion a[0]=45832 a[1]=32312
motion a[0]=45877 a[1]=32292
motion a[0]=45912 a[1]=32292
motion a[0]=45934 a[1]=32272
motion a[0]=45934 a[1]=32251
motion a[0]=45946 a[1]=32231
motion a[0]=45946 a[1]=32211
motion a[0]=45946 a[1]=32191
motion a[0]=45957 a[1]=32150
motion a[0]=45957 a[1]=32110
motion a[0]=45968 a[1]=32049
motion a[0]=45980 a[1]=32009
motion a[0]=45991 a[1]=31928
motion a[0]=46048 a[1]=31665
motion a[0]=46037 a[1]=31705
motion a[0]=46105 a[1]=31422
motion a[0]=46094 a[1]=31443
motion a[0]=46105 a[1]=31402
motion a[0]=46116 a[1]=31341
motion a[0]=46116 a[1]=31341
button release 1 a[0]=46116 a[1]=31341
任何帮助，将不胜感激！
答案1
我设法使用 evdev 和 libevdev 库创建了一个 Python 驱动程序。我正在创建一个虚拟设备，然后简单地传递我从触控笔找到的事件。它可以处理压力事件和跟踪，但我无法让按钮工作。
只需复制此文件并将其标记为可执行文件，您就会看到一个名为“Custom Stylus”的设备，它可以工作。为了使其无缝衔接，我将其添加到，gnome-session-properties以便在启动时运行脚本。
希望这可以帮助！
#!/usr/bin/env python3
import sys
import libevdev
import time
import evdev
from evdev import UInput, AbsInfo, ecodes
import os
def main(args):
p = 0
i = 0
devices = evdev.list_devices()
for dev in devices:
# print('%-12i%s' % (p, evdev.InputDevice(dev).name))
if evdev.InputDevice(dev).name == 'CUST0000:00 27C6:0118 Stylus':
i = p
p += 1
# i=int(input("Enter number: "))
device = evdev.InputDevice(devices[i])
print(device)
# print(mouse.capabilities(verbose=True))
device.grab()
x, y = 0, 0
dev = libevdev.Device()
dev.name = "Custom Stylus"
dev.enable(libevdev.INPUT_PROP_DIRECT)
dev.enable(libevdev.EV_KEY.BTN_TOOL_PEN)
dev.enable(libevdev.EV_KEY.BTN_TOOL_RUBBER)
# Click
dev.enable(libevdev.EV_KEY.BTN_TOUCH)
# Press button 1 on pen
dev.enable(libevdev.EV_KEY.BTN_STYLUS)
# Press button 2 on pen, see great doc
dev.enable(libevdev.EV_KEY.BTN_STYLUS2)
# Send absolute X coordinate
dev.enable(libevdev.EV_ABS.ABS_X,
libevdev.InputAbsInfo(minimum=0, maximum=5760, resolution=17))
# Send absolute Y coordinate
dev.enable(libevdev.EV_ABS.ABS_Y,
libevdev.InputAbsInfo(minimum=0, maximum=3240, resolution=17))
# Send absolute pressure
dev.enable(libevdev.EV_ABS.ABS_PRESSURE,
libevdev.InputAbsInfo(minimum=0, maximum=1023))
dev.enable(libevdev.EV_SYN.SYN_REPORT)
dev.enable(libevdev.EV_SYN.SYN_DROPPED)
try:
uinput = dev.create_uinput_device()
print("New device at {} ({})".format(uinput.devnode, uinput.syspath))
# Sleep for a bit so udev, libinput, Xorg, Wayland, ...
# all have had a chance to see the device and initialize
# it. Otherwise the event will be sent by the kernel but
# nothing is ready to listen to the device yet. And it
# will never be detected in the futur ;-)
time.sleep(1)
# Reports that the PEN is close to the surface
# Important to make sure xinput can detect (and list)
# the pen. Otherwise, it won't write anything in gimp.
uinput.send_events([
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOOL_PEN,
value=1),
libevdev.InputEvent(libevdev.EV_SYN.SYN_REPORT,
value=0),
])
# Says that the pen it out of range of the tablet. Useful
# to make sure you can move your mouse, and to avoid
# strange things during the first draw.
uinput.send_events([
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOOL_PEN,
value=0),
libevdev.InputEvent(libevdev.EV_SYN.SYN_REPORT,
value=0),
])
for event in device.read_loop():
code, val = event.code, event.value
if code == ecodes.ABS_MT_POSITION_X:
uinput.send_events([
libevdev.InputEvent(libevdev.EV_ABS.ABS_X,
value=int(val)),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH,
value=1),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS2,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOOL_PEN,
value=1),
libevdev.InputEvent(libevdev.EV_SYN.SYN_REPORT,
value=0)])
# vpen.write(ecodes.EV_ABS, ecodes.ABS_X, int(val))
if code == ecodes.ABS_MT_POSITION_Y:
uinput.send_events([
libevdev.InputEvent(libevdev.EV_ABS.ABS_Y,
value=int(val)),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH,
value=1),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS2,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOOL_PEN,
value=1),
libevdev.InputEvent(libevdev.EV_SYN.SYN_REPORT,
value=0)])
if code == ecodes.ABS_MT_PRESSURE:
uinput.send_events([
libevdev.InputEvent(libevdev.EV_ABS.ABS_PRESSURE,
value=int(val)),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOUCH,
value=1),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_STYLUS2,
value=0),
libevdev.InputEvent(libevdev.EV_KEY.BTN_TOOL_PEN,
value=1),
libevdev.InputEvent(libevdev.EV_SYN.SYN_REPORT,
value=0)])
device.ungrab()
except KeyboardInterrupt:
pass
if __name__ == "__main__":
main(sys.argv)