Touchpad stopped working on an Acer AspireOne D255E

Solution 1:

My daughter complained that the touchpad had stopped working on her Acer Aspire One Happy2 that runs Ubuntu 11.10. It turned out she had accidentally pressed Fn + F7 which disables the touchpad rather than Fn + F8 to mute.

Pressing Fn + F7 brought it back to life.

Solution 2:

It's a problem with IRQ handling between mouse and touchpad. So, run these two commands to restart the driver:

sudo rmmod psmouse
sudo modprobe psmouse

This will make touchpad to work again.

Solution 3:

This is a way to create a file that fixed my Aspire One, so I'm sharing it:

Open the Terminal
cd /etc/modprobe.d/
gksudo gedit options.conf
In the text editor, type: options psmouse proto=imps
Save the file and close it.
sudo modprobe -r psmouse
sudo modprobe psmouse

Solution 4:

It's possible that you used a function key on the keyboard to disable the touchpad.

Solution 5:

There is actual a bug in Ubuntu 11.10

https://bugs.launchpad.net/ubuntu/oneiric/+source/xserver-xorg-input-synaptics/+bug/868400