Comment 11 for bug 1379450

I know this question has expired, but since I searched around and found the solution I thought I'd share it for those who are still searching. I know it's not the best way, but it works.

To enable the Touchpad you'll need to do the following from terminal:

1. sudo nano /etc/rc.local
2. Add the following line before the exit command. (sudo bash -c 'echo 1 > /sys/devices/platform/i8042/serio4/reg_07')
3. press CTRL+O then press Enter.

this will enable the touch-pad on start-up but it might stop working when suspended and/or hibernated. a workaround for this is:

1. sudo nano /etc/pm/sleep.d/sr-enable

and copy the following to the file

#!/bin/bash

case "$1" in
    suspend)
        ;;
    resume)
       sudo bash -c 'echo 1 > /sys/devices/platform/i8042/serio4/reg_07'
        ;;
    *)
        ;;
esac

3. press CTRL+O then press Enter.

4. sudo nano /etc/pm/sleep.d/ht-enable

5. again copy this

#!/bin/bash

case "$1" in
    hibernate)
        # executed on suspend
        ;;
    thaw)
        sudo bash -c 'echo 1 > /sys/devices/platform/i8042/serio4/reg_07' # executed on resume
        ;;
    *)
        ;;
esac

6. press CTRL+O then press Enter.

7. then (sudo chmod +x /etc/pm/sleep.d/ht-enable && sudo chmod +x /etc/pm/sleep.d/sr-enable)

8. then issue the following command ( sudo update-initramfs -u -k all )