diff --git a/src/plugins/qmldesigner/qmldesignerplugin.cpp b/src/plugins/qmldesigner/qmldesignerplugin.cpp
index 448c838732d..3ed752464ea 100644
--- a/src/plugins/qmldesigner/qmldesignerplugin.cpp
+++ b/src/plugins/qmldesigner/qmldesignerplugin.cpp
@@ -61,6 +61,7 @@
 #include <qplugin.h>
 #include <QDebug>
 #include <QProcessEnvironment>
+#include <QOpenGLContext>
 
 namespace QmlDesigner {
 
@@ -126,8 +127,10 @@ QmlDesignerPlugin::~QmlDesignerPlugin()
 ////////////////////////////////////////////////////
 bool QmlDesignerPlugin::initialize(const QStringList & /*arguments*/, QString *errorMessage/* = 0*/) // =0;
 {
-    if (errorMessage)
-        errorMessage->clear();
+    if (!QOpenGLContext().create()) {
+        *errorMessage = tr("Cannot create OpenGL context.");
+        return false;
+    }
 
     data = new QmlDesignerPluginData;
 
diff --git a/src/plugins/qmlprofiler/qmlprofilerplugin.cpp b/src/plugins/qmlprofiler/qmlprofilerplugin.cpp
index 31bf2ac0616..694424ca98f 100644
--- a/src/plugins/qmlprofiler/qmlprofilerplugin.cpp
+++ b/src/plugins/qmlprofiler/qmlprofilerplugin.cpp
@@ -37,6 +37,7 @@
 #include <analyzerbase/analyzermanager.h>
 #include <extensionsystem/pluginmanager.h>
 
+#include <QOpenGLContext>
 #include <QtPlugin>
 
 using namespace Analyzer;
@@ -52,7 +53,11 @@ QmlProfilerPlugin *QmlProfilerPlugin::instance = 0;
 bool QmlProfilerPlugin::initialize(const QStringList &arguments, QString *errorString)
 {
     Q_UNUSED(arguments)
-    Q_UNUSED(errorString)
+
+    if (!QOpenGLContext().create()) {
+        *errorString = tr("Cannot create OpenGL context.");
+        return false;
+    }
 
     auto tool = new QmlProfilerTool(this);
     auto widgetCreator = [tool] { return tool->createWidgets(); };
diff --git a/src/plugins/qtsupport/baseqtversion.cpp b/src/plugins/qtsupport/baseqtversion.cpp
index 7197099153e..91d65f78e9f 100644
--- a/src/plugins/qtsupport/baseqtversion.cpp
+++ b/src/plugins/qtsupport/baseqtversion.cpp
@@ -659,6 +659,8 @@ QList<Abi> BaseQtVersion::qtAbis() const
 
 bool BaseQtVersion::equals(BaseQtVersion *other)
 {
+    if (m_qmakeCommand != other->m_qmakeCommand)
+        return false;
     if (type() != other->type())
         return false;
     if (uniqueId() != other->uniqueId())
diff --git a/src/plugins/welcome/welcomeplugin.cpp b/src/plugins/welcome/welcomeplugin.cpp
index 4ae5c96c4af..0b7ac6e0e40 100644
--- a/src/plugins/welcome/welcomeplugin.cpp
+++ b/src/plugins/welcome/welcomeplugin.cpp
@@ -51,6 +51,7 @@
 #include <QMessageBox>
 
 #include <QDir>
+#include <QOpenGLContext>
 #include <QQmlPropertyMap>
 
 #ifdef USE_QUICK_WIDGET
@@ -286,8 +287,13 @@ WelcomePlugin::WelcomePlugin()
 {
 }
 
-bool WelcomePlugin::initialize(const QStringList & /* arguments */, QString * /* errorMessage */)
+bool WelcomePlugin::initialize(const QStringList & /* arguments */, QString *errorMessage)
 {
+    if (!QOpenGLContext().create()) {
+        *errorMessage = tr("Cannot create OpenGL context.");
+        return false;
+    }
+
     m_welcomeMode = new WelcomeMode;
     addAutoReleasedObject(m_welcomeMode);