Disabling touchpad after suspend/resume

Question

There are several questions about disabling touchpads on laptops on this site, but none of them seem to quite answer my question.

I want to disable my touchpad (I've done that bit) and keep it disabled after a suspend/resume (I am failing here).

I am running Ubuntu 12.04 on a cheap Chinese laptop.

I have an executable file /home/yannick/bin/notouch which looks like this:

xinput set-prop `xinput list | grep "ImPS/2 Generic" | awk '{print $7}' | sed "s/id=//"` "Device Enabled" 0

The script runs xinput once to get the id number of (what turns out to be) my touchpad, and then runs xinput again to disable the touchpad. I have it in my .bashrc and in other places.

At present, when I suspend and then resume my laptop, the touchpad comes alive again and I really want to stop this happening. So I also have a file

/etc/pm/sleep.d/97disable_touchpad (owned by root, +x) which looks like this:

#!/bin/bash
case "$1" in
    thaw|resume)
        /home/yannick/bin/notouch 2>/tmp/notoucherrors
        ;;
    *)
        ;;
esac
exit $?

And darn it, it doesn't work! Indeed the script does seem to run after a resume, and the content of /tmp/notoucherrors is:

Unable to connect to X server
Unable to connect to X server

Dammit I want my touchpad to stay disabled when I hibernate and resume. How do I make this happen?

Here are two other things I tried and that I couldn't get to work:

1) $synclient TouchpadOff=1

This returns

Couldn't find synaptics properties. No synaptics driver loaded?

2) System Settings -> Mouse and Touchpad. I only have options for mouse there (I would even go so far as to say that ubuntu thinks that my touchpad is a mouse for some reason). In particular there is no option to turn the touchpad off -- all I have is mouse options (general, pointer speed, drag and drop, double-click timeout).

Answer 1

I have a partial workaround which will do for now -- I randomly set the DISPLAY variable and hope. Works for now. I also run notouch as my userid (rather than root).

My disable_touchpad script in sleep.d now looks like this:

#!/bin/bash
case "$1" in
    thaw|resume)
        echo "running notouch" >> /tmp/notouchlogger
        export DISPLAY=:0
        su -c - yannick /home/yannick/bin/notouch 2>>/tmp/notoucherrors
        ;;
    *)
        ;;
esac
exit $?

and it seems to work.

Answer 2

With root privileges, try creating the file /etc/pm/sleep.d/0000trackpad.

sudo -i gedit /etc/pm/sleep.d/0000trackpad

enter you password if required past following code in gedit and save file

#!/bin/sh
case "$1" in
    resume)
        DISPLAY=:0.0 su USER -c '/usr/bin/synclient TouchpadOff=0' ;;
esac

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