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Special Forums Hardware How to *completely* disable laptop touchpad, without disabling trackpoint? Post 303041241 by DevuanFan on Tuesday 19th of November 2019 08:30:47 AM
Old 11-19-2019
How to *completely* disable laptop touchpad, without disabling trackpoint?

I run Devuan ASCII on my T400 laptop. I only use the trackpoint ("nipple mouse"). To me, the touchpad is just a nuisance.

I've discovered (by monitoring output of sudo cat /dev/input/event5) that the touchpad generates random input while the lid is closed. This causes applications that should run while the system is idle (e.g., xscreensaver) to never run while the lid is closed.

I've tried to disable the touchpad via xinput, synaptics and evtest (evtest --grab /dev/input/event5 >/dev/null 2>&1), but none of these remedy the issue. The only remedy I've found is to unbind the touchpad's driver with this command:
Code:
# echo serio1 >/sys/bus/serio/drivers/psmouse/unbind

Unfortunately, the above command has the unacceptable side effect of simultaneously unbinding serio2, which renders my trackpoint ("nipple mouse") inoperable.

Please, do you know how to *completely* disable the touchpad (e.g., via unbinding its driver) without disabling the trackpoint?

P.S. Here is some relevant information:
Code:
bruno@thinkpad:~$ cat /proc/bus/input/devices
---snip---
I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
N: Name="SynPS/2 Synaptics TouchPad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input6
U: Uniq=
H: Handlers=mouse0 event5
B: PROP=1
B: EV=b
B: KEY=420 30000 0 0 0 0
B: ABS=11000003

I: Bus=0011 Vendor=0002 Product=000a Version=0000
N: Name="TPPS/2 IBM TrackPoint"
P: Phys=synaptics-pt/serio0/input0
S: Sysfs=/devices/platform/i8042/serio1/serio2/input/input7
U: Uniq=
H: Handlers=mouse1 event6
B: PROP=21
B: EV=7
B: KEY=70000 0 0 0 0
B: REL=3

This User Gave Thanks to DevuanFan For This Post:
 

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synclient(1)						      General Commands Manual						      synclient(1)

NAME
synclient - commandline utility to query and modify Synaptics driver options. SYNOPSIS
synclient [-m interval] synclient [-hlV?] [var1=value1 [var2=value2] ...] DESCRIPTION
This program lets you change your Synaptics TouchPad driver for XOrg/XFree86 server parameters while X is running. For the -m and -h options, SHM must be enabled by setting the option SHMConfig "on" in your XOrg/XFree86 configuration. OPTIONS
-m interval monitor changes to the touchpad state. Interval specifies how often (in ms) to poll the touchpad state. Whenever a change in the touchpad state is detected, one line of output is generated that describes the current state of the touchpad. This option is only available in SHM mode. The following data is included in the output. time Time in seconds since the logging was started. x,y The x/y coordinates of the finger on the touchpad. The origin is in the upper left corner. z The "pressure" value. Pressing the finger harder on the touchpad typically produces a larger value. Note that most touch- pads don't measure the real pressure though. Instead, capacitance is usually measured, which is correlated to the contact area between the finger and the touchpad. Since more pressure usually means a larger contact area, the reported pressure value is at least indirectly related to the real pressure. f The number of fingers currently touching the touchpad. Note that only some touchpads can report more than one finger. Gen- erally, synaptics touchpads can, but ALPS touchpads can't. w The w value is a measurement of the finger width. This is only supported by some synaptics touchpads. Touchpads that can't measure the finger width typically report a faked constant value when a finger is touching the touchpad. l,r,u,d,m,multi The state of the left, right, up, down, middle and multi buttons. Zero means not pressed, one means pressed. Not all touch- pads have all these buttons. If a button doesn't exist, the value is always reported as 0. -l List current user settings. This is the default if no option is given. -V Print version number and exit. -? Show the help message. var=value Set user parameter var to value. FILES
/etc/X11/xorg.conf /etc/X11/XF86Config-4 EXAMPLES
To disable EdgeMotionSpeed: synclient EdgeMotionSpeed=0 To monitor touchpad events (requires SHM): synclient -m 100 AUTHORS
Peter Osterlund <petero2@telia.com> and many others. This man page was written by Mattia Dongili <malattia@debian.org> SEE ALSO
Xorg(1), syndaemon(1), synaptics(4) X Version 11 xf86-input-synaptics 1.6.2 synclient(1)
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