Index: /trunk/doc/manual/en_US/user_VBoxManage.xml
===================================================================
--- /trunk/doc/manual/en_US/user_VBoxManage.xml	(revision 55842)
+++ /trunk/doc/manual/en_US/user_VBoxManage.xml	(revision 55843)
@@ -2882,4 +2882,15 @@
           </glossdef>
         </glossentry>
+
+        <glossentry>
+          <glossterm><computeroutput>logginglevel</computeroutput></glossterm>
+
+          <glossdef>
+            <para>This configures the VBoxSVC release logging details.<footnote>
+              <para><ulink url="http://www.virtualbox.org/wiki/VBoxLogging">http://www.virtualbox.org/wiki/VBoxLogging</ulink>.</para>
+              </footnote>
+            </para>
+          </glossdef>
+        </glossentry>
       </glosslist></para>
   </sect1>
Index: /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp	(revision 55842)
+++ /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp	(revision 55843)
@@ -689,4 +689,5 @@
                      "                            loghistorycount <value>\n"
                      "                            defaultfrontend default|<name>\n"
+                     "                            logginglevel <log setting>\n"
                      "\n", SEP);
 
Index: /trunk/src/VBox/Frontends/VBoxManage/VBoxManageList.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VBoxManage/VBoxManageList.cpp	(revision 55842)
+++ /trunk/src/VBox/Frontends/VBoxManage/VBoxManageList.cpp	(revision 55843)
@@ -5,5 +5,5 @@
 
 /*
- * Copyright (C) 2006-2014 Oracle Corporation
+ * Copyright (C) 2006-2015 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -679,4 +679,6 @@
     systemProperties->COMGETTER(DefaultAdditionsISO)(str.asOutParam());
     RTPrintf("Default Guest Additions ISO:     %ls\n", str.raw());
+    systemProperties->COMGETTER(LoggingLevel)(str.asOutParam());
+    RTPrintf("Logging Level:                   %ls\n", str.raw());
     return S_OK;
 }
Index: /trunk/src/VBox/Frontends/VBoxManage/VBoxManageMisc.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VBoxManage/VBoxManageMisc.cpp	(revision 55842)
+++ /trunk/src/VBox/Frontends/VBoxManage/VBoxManageMisc.cpp	(revision 55843)
@@ -906,4 +906,11 @@
         CHECK_ERROR(systemProperties, COMSETTER(DefaultFrontend)(bstrDefaultFrontend.raw()));
     }
+    else if (!strcmp(a->argv[0], "logginglevel"))
+    {
+        Bstr bstrLoggingLevel(a->argv[1]);
+        if (!strcmp(a->argv[1], "default"))
+            bstrLoggingLevel.setNull();
+        CHECK_ERROR(systemProperties, COMSETTER(LoggingLevel)(bstrLoggingLevel.raw()));
+    }
     else
         return errorSyntax(USAGE_SETPROPERTY, "Invalid parameter '%s'", a->argv[0]);
Index: /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp	(revision 55842)
+++ /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp	(revision 55843)
@@ -5,5 +5,5 @@
 
 /*
- * Copyright (C) 2006-2014 Oracle Corporation
+ * Copyright (C) 2006-2015 Oracle Corporation
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -1181,4 +1181,6 @@
 {
     Utf8Str useLoggingLevel(aLoggingLevel);
+    if (useLoggingLevel.isEmpty())
+        useLoggingLevel = VBOXSVC_LOG_DEFAULT;
     int rc = RTLogGroupSettings(RTLogRelDefaultInstance(), useLoggingLevel.c_str());
     //  If failed and not the default logging level - try to use the default logging level.