で，ロケール設定とかとあわせて meta key (M-x とか)が 使えなくなるわけだが，emacs で meta key を扱えるようにするには
xterm: metaSendsEscape (class MetaSendsEscape) If ``true'', Meta characters (a character combined with the Meta modifier key) are converted into a two-character sequence with the character itself preceded by ESC. This applies as 他に関連する話としては eightBitInput とかも rxvt: meta8: boolean True: handle Meta (Alt) + keypress to set the 8th bit. False: handle Meta (Alt) + keypress as an escape prefix [default].
