ehavior is not specified[1]. I
don't think this was intentional btw - just no one considered the
multiple-key repeat option. So there you are free to do as you wish. But
most toolkits implement the simple behavior AFAIK.
[0]
http://www.x.org/releases/X11R7.7/doc/kbproto/xkbproto.html#Dete
Currently when you hold down two keys at the same time on the keyboard,
say for instance 'g' and '0' only the second key is repeated, producing
g000.. or 0ggg... On Microsoft Windows (given the right keyboard) if you
press 'g' and '0' at the same time it produces g0g0g0g0.. repeating both
keys at t