diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 084f100f..d02b08d0 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -1512,6 +1512,7 @@ Arthur Konovalov <kasjas@hot.ee>
  for translating OSD texts to the Estonian language
  for fixing a missing ',' in the Greek OSD texts
  for fixing a missing ',' in the Swedish OSD texts
+ for reporting problems with CAMs when checking the CAM status too frequently
 
 Milos Kapoun <m.kapoun@cra.cz>
  for suggesting to skip code table info in SI data
diff --git a/HISTORY b/HISTORY
index a119379b..577cbc66 100644
--- a/HISTORY
+++ b/HISTORY
@@ -5748,6 +5748,8 @@ Video Disk Recorder Revision History
 - Fixed initializing the timer's flags in the cTimer copy constructor (thanks to
   Andreas Mair).
 - Fixed setting the OSD level in the 'osddemo' example (thanks to Wolfgang Rohdewald).
+- Increased the time between checking the CAM status to 500ms to avoid problems
+  with some CAMs (reported by Arthur Konovalov).
 
 2008-04-13: Version 1.6.0-1
 
diff --git a/ci.c b/ci.c
index 05a1bd4e..4d3df3e0 100644
--- a/ci.c
+++ b/ci.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: ci.c 1.48 2007/04/30 13:02:49 kls Exp $
+ * $Id: ci.c 2.1 2008/04/13 13:28:52 kls Exp $
  */
 
 #include "ci.h"
@@ -1525,7 +1525,7 @@ void cCiAdapter::Action(void)
 
 cCamSlots CamSlots;
 
-#define MODULE_CHECK_INTERVAL 100 // ms
+#define MODULE_CHECK_INTERVAL 500 // ms
 #define MODULE_RESET_TIMEOUT    2 // s
 
 cCamSlot::cCamSlot(cCiAdapter *CiAdapter)