Special Forums Hardware How to *completely* disable laptop touchpad, without disabling trackpoint? Post 303041248 by DevuanFan on Tuesday 19th of November 2019 11:24:07 AM
Neo, here you go:
# echo serio1 >/sys/bus/serio/drivers/psmouse/unbind
# echo serio2 >/sys/bus/serio/drivers/psmouse/bind
bash: echo: write error: No such device

By the way, I found a hardware solution. If I disconnect the touchpad's ribbon (it's just below the palmrest, trivial to get to and disconnect), it only disables the touchpad (and its two buttons); the trackpoint (and its three buttons just below the space bar) remain fully functional. Here is the relevant part of the output when the touchpad's ribbon is disconnected (notice that there's no "serio2" anywhere):

$ cat /proc/bus/input/devices
I: Bus=0011 Vendor=0002 Product=000a Version=0000
N: Name="TPPS/2 IBM TrackPoint"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input6
U: Uniq=
H: Handlers=mouse0 event5 
B: PROP=21
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=3

So it seems that on a hardware level the touchpad and trackpoint are indepedent; it is only on the software level that the trackpoint is always a child of the touchpad.

I'm still interested in finding a software solution.
This User Gave Thanks to DevuanFan For This Post:
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syndaemon(1)						      General Commands Manual						      syndaemon(1)

syndaemon - a program that monitors keyboard activity and disables the touchpad when the keyboard is being used. SYNOPSIS
syndaemon [-i idle-time] [-m poll-inverval] [-d] [-p pid-file] [-t] [-k] [-K] [-R] DESCRIPTION
Disabling the touchpad while typing avoids unwanted movements of the pointer that could lead to giving focus to the wrong window. OPTIONS
-i <idle-time> How many seconds to wait after the last key press before enabling the touchpad. (default is 2.0s). -m <poll-interval> How many milliseconds to wait between two polling intervals. If this value is too low, it will cause unnecessary wake-ups. If this value is too high, some key presses (press and release happen between two intervals) may not be noticed. This switch has no effect when running with -R. Default is 200ms. -d Start as a daemon, ie in the background. -p <pid-file> Create a pid file with the specified filename. A pid file will only be created if the program is started in daemon mode. -t Only disable tapping and scrolling, not mouse movements, in response to keyboard activity. -k Ignore modifier keys when monitoring keyboard activity. -K Like -k but also ignore Modifier+Key combos. -R Use the XRecord extension for detecting keyboard activity instead of polling the keyboard state. ENVIRONMENT VARIABLES
DISPLAY Specifies the X server to contact. EXIT CODES
If syndaemon exists with a return code other than 0, the error encountered is as below. Exit code 1 Invalid commandline argument. Exit code 2 The connection to the X sever could not be established or no touchpad device could be found. Exit code 3 The fork into daemon mode failed or the pid file could not be created. Exit code 4 XRECORD requested but not available or usable on the server. CAVEATS
It doesn't make much sense to connect to a remote X server, because the daemon will then monitor the remote server for keyboard activity, but will disable the touchpad on the local machine. AUTHORS
Peter Osterlund <petero2@telia.com>. This man page was written by Mattia Dongili <malattia@debian.org> SEE ALSO
Xorg(1), synclient(1), synaptics(4) X Version 11 xf86-input-synaptics 1.6.2 syndaemon(1)

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