Index: lams_central/src/java/org/lamsfoundation/lams/web/controller/LtiController.java
===================================================================
diff -u -r87104ef92d7624f923876f19145b0b3495bf51fa -r9f6b6a7487f9b5cbf283bf95361e3778e93fde95
--- lams_central/src/java/org/lamsfoundation/lams/web/controller/LtiController.java	(.../LtiController.java)	(revision 87104ef92d7624f923876f19145b0b3495bf51fa)
+++ lams_central/src/java/org/lamsfoundation/lams/web/controller/LtiController.java	(.../LtiController.java)	(revision 9f6b6a7487f9b5cbf283bf95361e3778e93fde95)
@@ -477,7 +477,8 @@
 	request.setAttribute("title", lesson.getLessonName());
 	request.setAttribute("description", lesson.getLessonDescription());
 	request.setAttribute("isDisplayDesignImage", lesson.isDisplayDesignImage());
-	boolean isMonitor = securityService.isLessonMonitor(lessonId, userId, "learner monitor", false);
+	// only teachers can see "Open monitor" link 
+	boolean isMonitor = securityService.isLessonMonitor(lessonId, userId, null, false);
 	request.setAttribute("isMonitor", isMonitor);
 
 	//get learnerProgressDto
Index: lams_common/src/java/org/lamsfoundation/lams/security/ISecurityService.java
===================================================================
diff -u -r7475d08afc280b5e2e5ddf04e8bf35e3166aaf80 -r9f6b6a7487f9b5cbf283bf95361e3778e93fde95
--- lams_common/src/java/org/lamsfoundation/lams/security/ISecurityService.java	(.../ISecurityService.java)	(revision 7475d08afc280b5e2e5ddf04e8bf35e3166aaf80)
+++ lams_common/src/java/org/lamsfoundation/lams/security/ISecurityService.java	(.../ISecurityService.java)	(revision 9f6b6a7487f9b5cbf283bf95361e3778e93fde95)
@@ -38,6 +38,11 @@
 
     /**
      * Checks if the user is a monitor or owner of the given lesson, or a group manager of the organisation.
+     * 
+     * @param lessonId
+     * @param userId
+     * @param action describes action that was requested and is used for logging. If this value is null, no logging will be done.
+     * @param escalate
      */
     boolean isLessonMonitor(Long lessonId, Integer userId, String action, boolean escalate) throws SecurityException;
 
Index: lams_common/src/java/org/lamsfoundation/lams/security/SecurityService.java
===================================================================
diff -u -r2e0465b90f15f92e2f17490d2156f78bd959b4c6 -r9f6b6a7487f9b5cbf283bf95361e3778e93fde95
--- lams_common/src/java/org/lamsfoundation/lams/security/SecurityService.java	(.../SecurityService.java)	(revision 2e0465b90f15f92e2f17490d2156f78bd959b4c6)
+++ lams_common/src/java/org/lamsfoundation/lams/security/SecurityService.java	(.../SecurityService.java)	(revision 9f6b6a7487f9b5cbf283bf95361e3778e93fde95)
@@ -156,8 +156,11 @@
 	if (!hasGroupManagerRole && !(hasMonitorRole && securityDAO.isLessonMonitor(lessonId, userId, true))) {
 	    String error = "User " + userId + " is not monitor in lesson " + lessonId + " and can not \"" + action
 		    + "\"";
-	    SecurityService.log.debug(error);
-	    logEventService.logEvent(LogEvent.TYPE_ROLE_FAILURE, userId, userId, lessonId, null, error);
+	    //no logging needed, if action parameter is empty
+	    if (action != null) {
+		SecurityService.log.debug(error);
+		logEventService.logEvent(LogEvent.TYPE_ROLE_FAILURE, userId, userId, lessonId, null, error);
+	    }
 	    if (escalate) {
 		throw new SecurityException(error);
 	    } else {