145: Why doesn't my Meta key work in an xterm window?
  
  Try all of these methods before asking for further help:
  
  * You may have big problems using `mwm' as your window manager.  {Does
    anyone know a good generic solution to allow the use of the Meta key in
    Emacs with mwm?}
  
  * For X11R4: Make sure it really is a Meta key.  Use `xev' to find out
    what keysym your Meta key generates.  It should be either Meta_L or
    Meta_R.  If it isn't, use xmodmap to fix the situation.
  
  * Make sure the pty the xterm is using is passing 8 bit characters.
    `stty -a' (or `stty everything') should show `cs8' somewhere.  If it
    shows `cs7' instead, use `stty cs8 -istrip' (or `stty pass8') to fix
    it.
  
  * If there is an rlogin connection between the xterm and the Emacs, the
    `-8' argument may need to be given to rlogin to make it pass all 8
    bits of every character.
  
  * If the Emacs is running under Ultrix, it is reported that evaluating
    (set-input-mode t nil) helps.
  
  * If all else fails, you can make xterm generate "ESC W" when you type
    M-W, which is the same conversion Emacs would make if it got the M-W
    anyway.  In X11R4, the following resource specification will do this:
  
      XTerm.VT100.EightBitInput: false
  
    (This changes the behavior of the insert-eight-bit action.)
  
    With older xterms, you can specify this behavior with a translation:
  
      XTerm.VT100.Translations: #override \
        Meta<KeyPress>: string(0x1b) insert()
  
    You might have to replace `Meta' with `Alt'.