kscreen: Retry fetching config if kscreen gives nullptr

Apparently GetConfigOperation can retrieve a nullptr config, in which
case we just need to retry until kscreen gives us something.

components/mobileshellstate/panelsettingsdbusobjectmanager.cpp

@@ -58,15 +58,17 @@ void PanelSettingsDBusObjectManager::registerObjects()
         return;
     }
 
-    m_initialized = true;
-
     // Fetch kscreen config
     connect(new KScreen::GetConfigOperation(), &KScreen::GetConfigOperation::finished, this, [this](auto *op) {
         m_kscreenConfig = qobject_cast<KScreen::GetConfigOperation *>(op)->config();
         if (!m_kscreenConfig) {
+            qDebug() << "PanelSettingsDBusObjectManager: Failed to get kscreen config, attempting again";
+            registerObjects();
             return;
         }
 
+        m_initialized = true;
+
         KScreen::ConfigMonitor::instance()->addConfig(m_kscreenConfig);
 
         // Listen to all new screens and create a new output

components/rotationplugin/rotationutil.cpp

@@ -53,10 +53,20 @@ RotationUtil::Rotation mapRotation(KScreen::Output::Rotation rotation)
 RotationUtil::RotationUtil(QObject *parent)
     : QObject{parent}
     , m_sensor{new QOrientationSensor(this)}
+{
+    retrieveKScreen();
+
+    connect(m_sensor, &QOrientationSensor::readingChanged, this, &RotationUtil::updateShowRotationButton);
+    m_sensor->start();
+}
+
+void RotationUtil::retrieveKScreen()
 {
     connect(new KScreen::GetConfigOperation(), &KScreen::GetConfigOperation::finished, this, [this](auto *op) {
         m_config = qobject_cast<KScreen::GetConfigOperation *>(op)->config();
         if (!m_config) {
+            qDebug() << "RotationUtil: Failed to get kscreen config, attempting again";
+            retrieveKScreen();
             return;
         }
         KScreen::ConfigMonitor::instance()->addConfig(m_config);
@@ -71,9 +81,6 @@ RotationUtil::RotationUtil(QObject *parent)
             connect(output.data(), &KScreen::Output::autoRotatePolicyChanged, this, &RotationUtil::updateShowRotationButton);
         });
     });
-
-    connect(m_sensor, &QOrientationSensor::readingChanged, this, &RotationUtil::updateShowRotationButton);
-    m_sensor->start();
 }
 
 void RotationUtil::rotateToSuggestedRotation()

components/rotationplugin/rotationutil.h

@@ -47,6 +47,8 @@ private Q_SLOTS:
     void updateShowRotationButton();
 
 private:
+    void retrieveKScreen();
+
     bool m_showRotationButton{false};
     KScreen::Output::Rotation m_rotateTo;
     Rotation m_deviceRotation;

initialstart/modules/prepare/prepareutil.cpp

@@ -26,10 +26,12 @@ void PrepareUtil::initKScreen(std::function<void()> callback)
 {
     connect(new KScreen::GetConfigOperation(), &KScreen::GetConfigOperation::finished, this, [this, callback](auto *op) {
         m_config = qobject_cast<KScreen::GetConfigOperation *>(op)->config();
-
         if (!m_config) {
+            qDebug() << "PrepareUtil: Failed to get kscreen config, attempting again";
+            initKScreen(callback);
             return;
         }
+
         KScreen::ConfigMonitor::instance()->addConfig(m_config);
 
         int scaling = 100;

quicksettings/kscreenosd/kscreenosdutil.cpp

@@ -20,11 +20,15 @@ KScreenOSDUtil::KScreenOSDUtil(QObject *parent)
         }
         setOutputs(m_config->outputs().size());
     });
+}
 
+void KScreenOSDUtil::retrieveKScreen()
+{
     connect(new KScreen::GetConfigOperation(), &KScreen::GetConfigOperation::finished, this, [this](auto *op) {
         m_config = qobject_cast<KScreen::GetConfigOperation *>(op)->config();
         if (!m_config) {
-            qDebug() << "kscreenosdutil: Unable to obtain kscreen config";
+            qDebug() << "kscreenosdutil: Unable to obtain kscreen config, attempting again";
+            retrieveKScreen();
             return;
         }
         KScreen::ConfigMonitor::instance()->addConfig(m_config);

quicksettings/kscreenosd/kscreenosdutil.h

@@ -23,6 +23,8 @@ Q_SIGNALS:
     void outputsChanged();
 
 private:
+    void retrieveKScreen();
+
     KScreen::ConfigPtr m_config{nullptr};
     int m_outputs{0};