The keyboard and mouse started working for me after I turned off the option 
"Hyper-Threading" in the BIOS.
Or if I adding "noapic" to the grub boot options.
This is the best solutions that I found for myself.

I have a PS/2 keyboard and mouse,
Chipset - SiS 651/962L

-- 
[lucid] Keyboard and mouse freeze after grub, usb and PS/2 keyboard not working 
in X
https://bugs.launchpad.net/bugs/555169
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which is subscribed to xserver-xorg-input-keyboard in ubuntu.

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