Wrong keyboard layout
 

Just installed last version of Ubuntu - and found, that when I press "7" key on my digital keyboard (in right part of keyboard) - system types "1" digit!
"8" instead of "2", "9" instead of "3" and vice versa. I found that keyboard layout is wrong. When I open keyboard layout window, I see that buttons "1", "2", "3" is at top line. They are at bottom line on my keyboard! How can I change keyboard layout so that it will correspond my "hardware" keyboard?
On my Debian linux keyboard worked correctly!

This is what you get for switching from Debian to something easier ;-)

You can see what map you ended up with:

and then set it to your preferred one:

(except instead of dvorak, whatever layout you actually use...)

Hope that solves it!

This is nothing to do with the keyboard layout, but with numeric keypad one. I'm not familiar with Ubuntu, but somewhere there should be a keyboard configuration tool where you can set special options. Under Keypad, you should have it set to "default', and yours has been set to "phone-style".

$ sudo dpkg-reconfigure keyboard-configuration

Thanks to Shadow_7!
 

Shadow_7, dpkg-reconfigure keyboard-configuration was right answer.