twkj says to do this - plan9port - [fork] Plan 9 from user space
git clone git://src.adamsgaard.dk/plan9port
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---
commit 678359a95a034148c0c0ad268a3f00ba49569552
parent 26af0278ae93c2ea4cb6b46ae7c49f6eb5ec826c
Author: rsc 
Date:   Wed,  9 Jun 2004 14:29:08 +0000

wkj says to do this

Diffstat:
  M src/cmd/rio/main.c                  |       1 +

1 file changed, 1 insertion(+), 0 deletions(-)
---
diff --git a/src/cmd/rio/main.c b/src/cmd/rio/main.c
t@@ -416,6 +416,7 @@ sendcmessage(Window w, Atom a, long x, int isroot)
                 mask = SubstructureRedirectMask;                /* magic! */
         else
                 mask = ExposureMask;        /* not really correct but so be it */
+        mask |= KeyPressMask;        /* seems to be necessary */
         status = XSendEvent(dpy, w, False, mask, &ev);
         if (status == 0)
                 fprintf(stderr, "rio: sendcmessage failed\n");