From ca44dc1d6ad98549d3a5616b0dd38c108cace9f1 Mon Sep 17 00:00:00 2001
From: "benjamin.franksen" <benjamin.franksen@helmholtz-berlin.de>
Date: Tue, 2 Jul 2013 20:00:14 +0000
Subject: [PATCH] docs: updated the known problems page

---
 documentation/KnownProblems.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/documentation/KnownProblems.txt b/documentation/KnownProblems.txt
index e7b6dfcb..bf288e35 100644
--- a/documentation/KnownProblems.txt
+++ b/documentation/KnownProblems.txt
@@ -1,6 +1,21 @@
 Known Problems
 ==============
 
+.. _Known_Problems_2.1.12:
+
+Known Problems in Release 2.1.12
+--------------------------------
+
+If a synchronous pvGet (or pvPut) ever fails to get a callback from
+channel access, then all subsequent attempts to do pvGets on that
+channel will fail.
+
+Carl Lionberger <calionberger@lbl.gov>, who reported this problem,
+also found the reason: the semaphore that makes the state set block
+until the CA callback arrives, times out but is never signalled, so
+the variable never recovers from the situation.
+
+
 .. _Known_Problems_2.1.10:
 
 Known Problems in Release 2.1.10
-- 
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