diff --git a/src/plugins/debugger/cdb/cdbengine.cpp b/src/plugins/debugger/cdb/cdbengine.cpp
index 0c0ca5da820..5bcd4931091 100644
--- a/src/plugins/debugger/cdb/cdbengine.cpp
+++ b/src/plugins/debugger/cdb/cdbengine.cpp
@@ -825,6 +825,14 @@ void CdbEngine::runEngine()
             postCommand(breakAtFunctionCommand(breakFunction), 0);
         }
     }
+    if (debuggerCore()->boolSetting(BreakOnWarning)) {
+        postCommand("bm /( QtCored4!qWarning", 0); // 'bm': All overloads.
+        postCommand("bm /( Qt5Cored!QMessageLogger::warning", 0);
+    }
+    if (debuggerCore()->boolSetting(BreakOnFatal)) {
+        postCommand("bm /( QtCored4!qFatal", 0); // 'bm': All overloads.
+        postCommand("bm /( Qt5Cored!QMessageLogger::fatal", 0);
+    }
     if (startParameters().startMode == AttachCore) {
         QTC_ASSERT(!m_coreStopReason.isNull(), return; );
         notifyInferiorUnrunnable();
diff --git a/src/plugins/debugger/gdb/gdbengine.cpp b/src/plugins/debugger/gdb/gdbengine.cpp
index 500724ebdeb..fb12b6fda45 100644
--- a/src/plugins/debugger/gdb/gdbengine.cpp
+++ b/src/plugins/debugger/gdb/gdbengine.cpp
@@ -5096,13 +5096,18 @@ void GdbEngine::handleNamespaceExtraction(const GdbResponse &response)
     } else {
         if (debuggerCore()->boolSetting(BreakOnAbort))
             postCommand("-break-insert -f abort");
-        if (debuggerCore()->boolSetting(BreakOnWarning))
+        if (debuggerCore()->boolSetting(BreakOnWarning)) {
             postCommand("-break-insert -f '" + qtNamespace() + "qWarning'");
-        if (debuggerCore()->boolSetting(BreakOnFatal))
+            postCommand("-break-insert -f '" + qtNamespace() + "QMessageLogger::warning'");
+        }
+        if (debuggerCore()->boolSetting(BreakOnFatal)) {
             postCommand("-break-insert -f '" + qtNamespace() + "qFatal'",
-                CB(handleBreakOnQFatal));
-        else
+                        CB(handleBreakOnQFatal), QVariant(false));
+            postCommand("-break-insert -f '" + qtNamespace() + "QMessageLogger::fatal'",
+                        CB(handleBreakOnQFatal), QVariant(true));
+        } else {
             notifyInferiorSetupOk();
+        }
     }
 }
 
@@ -5119,7 +5124,8 @@ void GdbEngine::handleBreakOnQFatal(const GdbResponse &response)
     }
 
     // Continue setup.
-    notifyInferiorSetupOk();
+    if (response.cookie.toBool())
+        notifyInferiorSetupOk();
 }
 
 void GdbEngine::notifyInferiorSetupFailed(const QString &msg)
diff --git a/src/plugins/debugger/gdb/gdboptionspage.cpp b/src/plugins/debugger/gdb/gdboptionspage.cpp
index ddeb0ed6e4f..44c0a006274 100644
--- a/src/plugins/debugger/gdb/gdboptionspage.cpp
+++ b/src/plugins/debugger/gdb/gdboptionspage.cpp
@@ -187,6 +187,7 @@ GdbOptionsPageWidget::GdbOptionsPageWidget(QWidget *parent)
         "of debug information such as <i>/usr/src/debug</i> "
         "when starting GDB.</body></html>"));
 
+    // #fixme: 2.7 Move to common settings page.
     checkBoxBreakOnWarning = new QCheckBox(groupBoxGeneral);
     checkBoxBreakOnWarning->setText(CommonOptionsPage::msgSetBreakpointAtFunction("qWarning"));
     checkBoxBreakOnWarning->setToolTip(CommonOptionsPage::msgSetBreakpointAtFunctionToolTip("qWarning"));