HP 2000笔记本触摸板在Ubuntu与Windows系统中无响应，外接鼠标可正常使用

大家好，我最近碰到个棘手的问题，想请各位帮忙诊断下：我的HP 2000笔记本装了Ubuntu 20.04和Windows 7双系统，触摸板完全无响应——不管是点击还是触摸操作都没动静，根本没法用来导航。但奇怪的是，外接USB鼠标一切正常，这让我觉得问题可能不是纯硬件故障？

问题细节： #

• 双系统均受影响：不管是Ubuntu 20.04还是Windows 7，触摸板都没法用
• 曾有临时解决方法：一开始在Windows 7安全模式下能暂时恢复触摸板功能，但后来这个方法也失效了
• Live环境验证过：连用Ubuntu安装U盘启动的live环境里，触摸板还是没反应

我收集的诊断日志： #

执行 xinput list 的输出：

WARNING: running xinput against an Xwayland server. See the xinput man page for details.

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ xwayland-pointer:16                       id=7    [slave  pointer  (2)]
⎜   ↳ xwayland-relative-pointer:16              id=8    [slave  pointer  (2)]
⎜   ↳ xwayland-pointer-gestures:16              id=9    [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
↳ xwayland-keyboard:16                      id=6    [slave  keyboard (3)]

执行 lsusb 的输出：

Bus 002 Device 007: ID 0cf3:311d Qualcomm Atheros Communications Bluetooth
Bus 002 Device 003: ID 05c8:0222 Cheng Uei Precision Industry Co., Ltd (Foxlink) HP Webcam-50
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 1c4f:0048 SiGma Micro Usb Mouse
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

执行 sudo lshw -C input 的输出：

*-usb
description: Mouse
product: SIGMACHIP Usb Mouse
vendor: SIGMACHIP
physical id: 2
bus info: usb@1:1.2
logical name: input11
logical name: /dev/input/event9
logical name: /dev/input/mouse0
version: 1.10
capabilities: usb-1.10 usb
configuration: driver=usbhid maxpower=98mA speed=2Mbit/s
*-input:0
product: HDA Intel PCH HDMI/DP,pcm=3
physical id: 0
logical name: input10
logical name: /dev/input/event8
*-input:1
product: HDA Intel PCH Mic
physical id: 1
logical name: input8
logical name: /dev/input/event6
*-input:2
product: HDA Intel PCH Headphone
physical id: 2
logical name: input9
logical name: /dev/input/event7
*-pnp00:03
product: PnP device PNP0303
physical id: 3
capabilities: pnp
*-input:0
product: Lid Switch
physical id: 1
logical name: input0
logical name: /dev/input/event0
capabilities: platform
*-input:1
product: Power Button
physical id: 2
logical name: input1
logical name: /dev/input/event1
capabilities: platform
*-input:2
product: Power Button
physical id: 3
logical name: input2
logical name: /dev/input/event2
capabilities: platform
*-input:3
product: AT Translated Set 2 keyboard
physical id: 4
logical name: input3
logical name: /dev/input/event3
logical name: input3::capslock
logical name: input3::numlock
logical name: input3::scrolllock
capabilities: i8042
*-input:4
product: HP WMI hotkeys
physical id: 5
logical name: input6
logical name: /dev/input/event4
capabilities: platform
*-input:5
product: Video Bus
physical id: 6
logical name: input7
logical name: /dev/input/event5
capabilities: platform

执行 sudo dmesg | tail 的输出：

[ 6454.093801] RTL8208 Fast Ethernet r8169-0-100:00: attached PHY driver (mii_bus:phy_addr=r8169-0-100:00, irq=MAC)
[ 6454.386777] r8169 0000:01:00.0 eno1: Link is Down
[ 6456.897668] wlo1: authenticate with 34:71:46:02:58:3d
[ 6456.897715] wlo1: 80 MHz not supported, disabling VHT
[ 6456.915966] wlo1: send auth to 34:71:46:02:58:3d (try 1/3)
[ 6456.918183] wlo1: authenticated
[ 6456.919826] wlo1: associate with 34:71:46:02:58:3d (try 1/3)
[ 6456.927508] wlo1: RX AssocResp from 34:71:46:02:58:3d (capab=0x431 status=0 aid=2)
[ 6456.927776] wlo1: associated
[ 6456.996206] IPv6: ADDRCONF(NETDEV_CHANGE): wlo1: link becomes ready

从日志里能看到，系统完全没识别到触摸板设备，结合之前安全模式曾生效的情况，我怀疑可能是驱动冲突，或者触摸板的硬件模块有间歇性的连接问题？有没有大佬能给点排查方向？

备注：内容来源于stack exchange，提问作者A B