@Helmut, from your Xorg.log and dmesg, MSFT0001 has beend detected and
enabled in kernel, but somehow it failed to be enabled in xorg:
[ 74.771] (II) config/udev: Adding input device MSFT0001:00 04F3:3140 Mouse
(/dev/input/event16)
[ 74.771] (**) MSFT0001:00 04F3:3140 Mouse: Applying InputClass "evdev
pointer catchall"
[ 74.771] (**) MSFT0001:00 04F3:3140 Mouse: Applying InputClass "libinput
pointer catchall"
[ 74.771] (II) Using input driver 'libinput' for 'MSFT0001:00 04F3:3140
Mouse'
[ 74.771] (**) MSFT0001:00 04F3:3140 Mouse: always reports core events
[ 74.771] (**) Option "Device" "/dev/input/event16"
[ 74.771] (**) Option "_source" "server/udev"
[ 74.772] (II) event16 - MSFT0001:00 04F3:3140 Mouse: is tagged by udev as:
Mouse Pointingstick
[ 74.772] (II) event16 - MSFT0001:00 04F3:3140 Mouse: device is a pointer
[ 74.772] (II) event16 - MSFT0001:00 04F3:3140 Mouse: device removed
[ 74.836] (**) Option "config_info"
"udev:/sys/devices/platform/AMDI0010:03/i2c-0/i2c-MSFT0001:00/0018:04F3:3140.0001/input/input18/event16"
[ 74.836] (II) XINPUT: Adding extended input device "MSFT0001:00 04F3:3140
Mouse" (type: MOUSE, id 16)
[ 74.836] (**) Option "AccelerationScheme" "none"
[ 74.836] (**) MSFT0001:00 04F3:3140 Mouse: (accel) selected scheme none/0
[ 74.836] (**) MSFT0001:00 04F3:3140 Mouse: (accel) acceleration factor:
2.000
[ 74.836] (**) MSFT0001:00 04F3:3140 Mouse: (accel) acceleration threshold: 4
[ 74.837] (II) event16 - MSFT0001:00 04F3:3140 Mouse: is tagged by udev as:
Mouse Pointingstick
[ 74.837] (II) event16 - MSFT0001:00 04F3:3140 Mouse: device is a pointer
[ 74.838] (II) config/udev: Adding input device MSFT0001:00 04F3:3140 Mouse
(/dev/input/mouse0)
[ 74.838] (II) No input driver specified, ignoring this device.
[ 74.838] (II) This device may have been added with another device file.
[ 74.839] (II) config/udev: Adding input device MSFT0001:00 04F3:3140
Touchpad (/dev/input/event17)
[ 74.839] (**) MSFT0001:00 04F3:3140 Touchpad: Applying InputClass "evdev
touchpad catchall"
[ 74.839] (**) MSFT0001:00 04F3:3140 Touchpad: Applying InputClass "libinput
touchpad catchall"
[ 74.839] (II) Using input driver 'libinput' for 'MSFT0001:00 04F3:3140
Touchpad'
[ 74.839] (**) MSFT0001:00 04F3:3140 Touchpad: always reports core events
[ 74.839] (**) Option "Device" "/dev/input/event17"
[ 74.839] (**) Option "_source" "server/udev"
[ 74.839] (II) event17 - MSFT0001:00 04F3:3140 Touchpad: is tagged by udev
as: Touchpad
[ 74.840] (II) event17 - MSFT0001:00 04F3:3140 Touchpad: device is a touchpad
[ 74.840] (II) event17 - MSFT0001:00 04F3:3140 Touchpad: device removed
[ 74.916] (**) Option "config_info"
"udev:/sys/devices/platform/AMDI0010:03/i2c-0/i2c-MSFT0001:00/0018:04F3:3140.0001/input/input19/event17"
[ 74.917] (II) XINPUT: Adding extended input device "MSFT0001:00 04F3:3140
Touchpad" (type: TOUCHPAD, id 17)
[ 74.917] (**) Option "AccelerationScheme" "none"
[ 74.917] (**) MSFT0001:00 04F3:3140 Touchpad: (accel) selected scheme none/0
[ 74.917] (**) MSFT0001:00 04F3:3140 Touchpad: (accel) acceleration factor:
2.000
[ 74.917] (**) MSFT0001:00 04F3:3140 Touchpad: (accel) acceleration
threshold: 4
[ 74.918] (II) event17 - MSFT0001:00 04F3:3140 Touchpad: is tagged by udev
as: Touchpad
[ 74.919] (II) event17 - MSFT0001:00 04F3:3140 Touchpad: device is a touchpad
[ 74.919] (II) config/udev: Adding input device MSFT0001:00 04F3:3140
Touchpad (/dev/input/mouse1)
[ 74.919] (II) No input driver specified, ignoring this device.
[ 74.919] (II) This device may have been added with another device file.
Add xserver-xorg-input-libinput to related package.
** Also affects: xserver-xorg-input-libinput (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1887190
Title:
MSFT Touchpad not working on Lenovo Legion-5 15ARH05
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