new Thinkpad T490 (if required replace the device-name and numbers)
Ubuntu 20.04.2
This property hides the "MB2-press event" for scrolling the screen with the "special Thinkpad red-Pointing-button hardware"
libinput Button Scrolling Button (343): 2
The "MB2-press event" is not fired at "MB2 press" ... it fires at "MB2 release". So in proviewR no "MB2-hold and move" is possible.
We need to "disable this red-button-scrolling" (not needed, use 2-finger-pad-scrolling) by setting
libinput Button Scrolling Button (343): 0
### what I did ...
review the hardware-events with the tool "xev"
xyz@t490:~$ xinput list-props "TPPS/2 Elan TrackPoint"
Device 'TPPS/2 Elan TrackPoint':
Device Enabled (179): 1
Coordinate Transformation Matrix (181): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Natural Scrolling Enabled (325): 0
libinput Natural Scrolling Enabled Default (326): 0
libinput Scroll Methods Available (329): 0, 0, 1
libinput Scroll Method Enabled (330): 0, 0, 1
libinput Scroll Method Enabled Default (331): 0, 0, 1
libinput Button Scrolling Button (343): 2
libinput Button Scrolling Button Default (344): 2
libinput Middle Emulation Enabled (335): 0
libinput Middle Emulation Enabled Default (336): 0
libinput Accel Speed (337): -0.220588
libinput Accel Speed Default (338): 0.000000
libinput Accel Profiles Available (345): 1, 1
libinput Accel Profile Enabled (346): 1, 0
libinput Accel Profile Enabled Default (347): 1, 0
libinput Left Handed Enabled (339): 0
libinput Left Handed Enabled Default (340): 0
libinput Send Events Modes Available (302): 1, 0
libinput Send Events Mode Enabled (303): 0, 0
libinput Send Events Mode Enabled Default (304): 0, 0
Device Node (305): "/dev/input/event14"
Device Product ID (306): 2, 10
libinput Drag Lock Buttons (341): <no items>
libinput Horizontal Scroll Enabled (342): 1
xyz@t490:~$ xinput set-prop "TPPS/2 Elan TrackPoint" "libinput Button Scrolling Button" 0
todo: decide about persistent setting
