From 196f2af596509a318d4f5a83009167ea2bdcf61f Mon Sep 17 00:00:00 2001
From: Klaus Schmidinger <vdr@tvdr.de>
Date: Mon, 9 Jan 2017 14:27:36 +0100
Subject: [PATCH] The mechanism of trying different CAMs when switching to an
 encrypted channel is now only triggered if there acually is more than one CAM
 in the system

---
 HISTORY  |  3 ++-
 device.c | 16 +++++++++-------
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/HISTORY b/HISTORY
index ae1f54bb..22523c2e 100644
--- a/HISTORY
+++ b/HISTORY
@@ -8894,4 +8894,5 @@ Video Disk Recorder Revision History
   by Dietmar Spingler). This speeds up switching to encrypted channels after
   newly starting VDR, in case there is more than one CAM in the system.
 - Fixed a flaw in handling timeouts for encrypted channels.
-  
+- The mechanism of trying different CAMs when switching to an encrypted channel is
+  now only triggered if there acually is more than one CAM in the system.
diff --git a/device.c b/device.c
index 19997e45..9bb00b42 100644
--- a/device.c
+++ b/device.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: device.c 4.4 2017/01/09 12:51:05 kls Exp $
+ * $Id: device.c 4.5 2017/01/09 14:25:38 kls Exp $
  */
 
 #include "device.h"
@@ -1678,12 +1678,14 @@ bool cDevice::AttachReceiver(cReceiver *Receiver)
          Unlock();
          if (camSlot && Receiver->priority > MINPRIORITY) { // priority check to avoid an infinite loop with the CAM slot's caPidReceiver
             camSlot->StartDecrypting();
-            startScrambleDetection = time(NULL);
-            scramblingTimeout = TS_SCRAMBLING_TIMEOUT;
-            bool KnownToDecrypt = ChannelCamRelations.CamDecrypt(Receiver->ChannelID(), camSlot->SlotNumber());
-            if (KnownToDecrypt)
-               scramblingTimeout *= 10; // give it time to receive ECM/EMM
-            dsyslog("CAM %d: %sknown to decrypt channel %s (scramblingTimeout = %ds)", camSlot->SlotNumber(), KnownToDecrypt ? "" : "not ", *Receiver->ChannelID().ToString(), scramblingTimeout);
+            if (CamSlots.Count() > 1) { // don't try different CAMs if there is only one
+               startScrambleDetection = time(NULL);
+               scramblingTimeout = TS_SCRAMBLING_TIMEOUT;
+               bool KnownToDecrypt = ChannelCamRelations.CamDecrypt(Receiver->ChannelID(), camSlot->SlotNumber());
+               if (KnownToDecrypt)
+                  scramblingTimeout *= 10; // give it time to receive ECM/EMM
+               dsyslog("CAM %d: %sknown to decrypt channel %s (scramblingTimeout = %ds)", camSlot->SlotNumber(), KnownToDecrypt ? "" : "not ", *Receiver->ChannelID().ToString(), scramblingTimeout);
+               }
             }
          Start();
          return true;