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Understanding how emacs sets up input


From: Jonathan Ganc
Subject: Understanding how emacs sets up input
Date: Fri, 7 Apr 2017 00:04:38 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Hi,

I'm trying to resolve a bug I have with emacs on Ubuntu (https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26104) where pressing the Alt key alone produces a 'switch-frame' command, messing up commands like 'yank-pop' or 'dabbrev-expand'. I'm trying to figure out how emacs gets commands from xwindows.

One thing I noticed is that xev (e.g., if I type 'xev -id ...') does not catch most emacs keys (e.g. alphanumeric keys, Ctrl, TAB, shift) but it does catch the Alt key. Can someone explain why that is and where emacs sets that up (I realize it is likely in the C code)?




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