On Fri, Jan 15, 2016 at 03:12:14PM +0100, Vincent Lefevre wrote:
> On 2016-01-14 14:10:04 -0800, Jeffery Small wrote:

> > Does any of this shed additional light on what might be wrong.  I'm
> > perplexed by the fact that the manual entry very occasionally works.  This
> > seems very odd.
> 
> Perhaps your keyboard has some problem

If a keystroke produces a sequence of bytes, and the keyboard
is not in raw mode or so, it is in principle impossible
to distinguish the single keystroke from the sequence
of keystrokes that produces the same output.

Software tries nevertheless to support function keys by
looking at the timing: if the bytes follow each other
sufficiently quickly, the sequence is assumed to be
from a function key.

Andries

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