re,
it turns out that SIGIO handling in emacs incorporates too many
workarounds, especially when running under X and at this point
it's impossible (at least for me) to grasp through the code and
find why it fails to work with xcb or X in general.
but fortunately there's a tweak (DISABLE_SIGIO) that makes it
use poll exclusively and fixes everything!
and also, there's an emacs 23.3 released already.
cheers.
--- src/s/openbsd.h~ Tue Mar 15 11:56:59 2011
+++ src/s/openbsd.h Tue Mar 15 11:57:25 2011
@@ -36,5 +36,7 @@
#endif
+#define BROKEN_SIGIO
+
/* arch-tag: 7e3f65ca-3f48-4237-933f-2b208b21e8e2
(do not change this comment) */
