How to prevent focus change due to palm touching touchpad in accident

[QiangF]

Some laptop touchpad too close to the keyboard, and are easily triggered during typing, result in sending key to wrong application.
Is there an easy way to force changing focus with switch buffer command only? and only send mouse touch pad event to the focused window?

[pratikrath126]

To prevent accidental focus changes due to palm touching the touchpad, you can disable touchpad tapping. Run 'xinput list' to find the touchpad device ID, then 'xinput set-prop "libinput Tapping Enabled" 0' to disable tapping.

For EXWM specifically, if you want to restrict mouse events to the focused window, you can configure EXWM to not follow the mouse for focus. Add (setq exwm-workspace-mouse-behavior 'ignore) to your config, or use (exwm-input-set-simulation-keys ...) to control input simulation.

Refer to the EXWM documentation for more on input handling.

[QiangF]

Thank you for the help. exwm-workspace-mouse-behavior is not defined.
After some searching, the ideal way is to change the tap pressure sensitivity, but it looks not supported on my machine:

 $ xinput list-props 14
 Device 'ALP0012:00 044E:120C':
         Device Enabled (187):   0
         Coordinate Transformation Matrix (189): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000          
         libinput Tapping Enabled (352): 1
         libinput Tapping Enabled Default (353): 0
         libinput Tapping Drag Enabled (354):    1
         libinput Tapping Drag Enabled Default (355):    1
         libinput Tapping Drag Lock Enabled (356):       0
         libinput Tapping Drag Lock Enabled Default (357):       0
         libinput Tapping Button Mapping Enabled (358):  1, 0
         libinput Tapping Button Mapping Default (359):  1, 0
         libinput Natural Scrolling Enabled (319):       0
         libinput Natural Scrolling Enabled Default (320):       0
         libinput Disable While Typing Enabled (360):    1
         libinput Disable While Typing Enabled Default (361):    1
         libinput Scroll Methods Available (321):        1, 1, 0
         libinput Scroll Method Enabled (322):   1, 0, 0
         libinput Scroll Method Enabled Default (323):   1, 0, 0
         libinput Click Methods Available (362): 1, 1
         libinput Click Method Enabled (363):    0, 1
         libinput Click Method Enabled Default (364):    1, 0
         libinput Clickfinger Button Mapping Enabled (365):      1, 0
         libinput Clickfinger Button Mapping Default (366):      1, 0
         libinput Middle Emulation Enabled (328):        0
         libinput Middle Emulation Enabled Default (329):        0
         libinput Accel Speed (330):     0.000000
         libinput Accel Speed Default (331):     0.000000
         libinput Accel Profiles Available (332):        1, 1, 1
         libinput Accel Profile Enabled (333):   1, 0, 0
         libinput Accel Profile Enabled Default (334):   1, 0, 0
         libinput Accel Custom Fallback Points (335):    <no items>
         libinput Accel Custom Fallback Step (336):      0.000000
         libinput Accel Custom Motion Points (337):      <no items>
         libinput Accel Custom Motion Step (338):        0.000000
         libinput Accel Custom Scroll Points (339):      <no items>
         libinput Accel Custom Scroll Step (340):        0.000000
         libinput Left Handed Enabled (341):     0
         libinput Left Handed Enabled Default (342):     0
         libinput Send Events Modes Available (304):     1, 1
         libinput Send Events Mode Enabled (305):        0, 0
         libinput Send Events Mode Enabled Default (306):        0, 0
         Device Node (307):      "/dev/input/event8"
         Device Product ID (308):        1102, 4620
         libinput Drag Lock Buttons (343):       <no items>
         libinput Horizontal Scroll Enabled (344):       1
         libinput Scrolling Pixel Distance (345):        15
         libinput Scrolling Pixel Distance Default (346):        15
         libinput High Resolution Wheel Scroll Enabled (347):    1