I want to get more combos in Emacs, so I tried to bind Alt, Super, Hyper via modmap to keys. I failed at it. So I tried to use
emacs -Q for clean experiment. Pressed C-hc and executed in other terminal:
xdotool key --window 119537875 "meta+x" xdotool key --window 119537875 "alt+x"
Both commands resulted in
M-x runs the command execute-extended-command. So, Emacs do not differ between Alt and Meta. How can I fix it?