This question was asked many times already:
Using ALT + Keycode for accents?
Ways to enter special characters? Is Alt+Numpad possible?
How can I type ASCII characters like Alt + numpad in Windows?
But none of the answers actually solve my problem. The proposed solution, using Ctrl+Shift+U is not answer to question how to use windows Alt codes.
After many months I have finally persuaded my mum to move from Vista to Ubuntu. But the Alt codes are not working there. Teach her to use the Unicode codes is not really a viable option.
Is there a way to enable the Alt codes in Ubuntu? If not native way, maybe recompiling keyboard driver, creating some wrapper, etc...
Again I'm not asking for the Unicode solution.