我刚买了一台联想 Flex 5，并在其上安装了 Ubuntu 20.10。我想使用触摸屏，想知道是否有任何方法可以启用它。
lsusb输出：
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 06cb:00be Synaptics, Inc.
Bus 003 Device 002: ID 174f:243f Syntek Integrated Camera
Bus 003 Device 006: ID 8087:0026 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
xinput输出：
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ MSFT0001:00 06CB:CE2D Mouse id=17 [slave pointer (2)]
⎜ ↳ MSFT0001:00 06CB:CE2D Touchpad id=18 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=20 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ Integrated Camera: Integrated C id=10 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Ideapad extra buttons id=19 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]