Re: doubling of input events on focus (X, 21.1 and later)

[Ami Fischman]

Richard Stallman <rms@gnu.org> writes:

[...]

> After this happens next time, please type C-h l and see if the
> character appears twice there.  That will at least begin 
> to diagnose where the problem happens.

I've done this before, and the lossage buffer indeed shows the doubled
character (as if I'd typed it in twice).  I used to think that maybe this
was jittery fingers or a defective keyboard, but this symptom ONLY happens
w/ emacs, and ONLY when switching focus to it from another X app.  Also, it
happens sometimes while I'm typing common words that I never mis-spell
(such as "mail" or certain email addresses), so I'm almost 100% confident
the problem is in software somewhere...

FWIW, I'm using XFree86-4.2.0 on a modified RH7.2 PC.

I wrote the above, then saved the draft, hoping that the behaviour will
occur again soon.  I did some typing, then switched to Gnus' *Group* buffer,
and typed "4 g" (which gets new news of level 4 and lower).  Switched away
from emacs (waiting for gnus to do it's thing, since it involves several
remote nntp servers).  When I switched back, I hit the up arrow key, and
instead of moving up one line, it moved up three lines.  C-h l shows:
4 g <up> <f12> l

Any ideas?  Any other kind of debugging I can do next time this happens? 
Thanks,
-- 
  Ami Fischman
  usenet@fischman.org