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I'm having the same problem as in previous Ubuntu versions. The workaround to the problem for 11.10 was to use, but for 12.04 I haven't found a solution that works.

HP 210-1095tu netbook Atom n450 RAM 2GB

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I had that problem (touchpad right click not working) with ubuntu 12.04, and found this link very useful:

In my case, all I had to do was to define the area of the right button, adding the line

Option "SoftButtonAreas"  "50% 0 82% 0 0 0 0 0"

to the configuration file as explained there.

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I have the same issue and this workaround has no side effects. I'm running Ubuntu Server 12.04 with gnome-shell 3.4 on it (for that fast, bare bones gui without all the pre-loaded packages). With two fingers, double tap the touchpad and stay down on the second tap then let up one finger to move the mouse pointer. Note: must have Enable mouse clicks with touchpad option checked in System Settings > Mouse and Touchpad. On my machine it seems to behave as though the right mouse button was held down. When you let up the second finger, whatever is being pointed at by the mouse pointer gets right clicked. No side effects that I can find. I'd still rather my right mouse button work but I'll take it for now.

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You should use below command if you have followed the echo options psmouse proto=exps > /etc/modprobe.d/psmouse.modprobe this command.

Please don't use above command or if you have been used it so below there is a solution to revert back

sudo rm /etc/modprobe.d/psmouse.modprobe sudo reboot

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Your answer is confusing. Could you please edit it to improve it. – ankit7540 May 25 at 17:45
sudo su
echo options psmouse proto=exps > /etc/modprobe.d/psmouse.modprobe

This does have some side effects: you may lose other touchpad features, like two-finger scrolling. In fact, this removes the touchpad tab from the mouse config settings window.

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Tried this, and it didn't restore the right-click on a Samsung 900X3A. – l0b0 Jun 24 '12 at 17:32
I use the command you wrote but all the touchpad functions are gone, How can I recover it? – Erogol Mar 15 '13 at 2:16

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