diff --git a/gui/main.py b/gui/main.py
index 4c81196..3eaaf67 100644
--- a/gui/main.py
+++ b/gui/main.py
@@ -13,6 +13,12 @@ import zipfile
 import shutil
 import tempfile
 from pathlib import Path
+
+if sys.platform.startswith("linux"):
+    from util.linux_desktop import configure_qt_platform
+
+    configure_qt_platform()
+
 from PyQt5.QtWidgets import (
     QApplication, QMainWindow, QTabWidget, QVBoxLayout, QHBoxLayout,
     QWidget, QPushButton, QLabel, QFileDialog, QMessageBox, QProgressBar,
@@ -1002,7 +1008,9 @@ def main():
             QApplication.setHighDpiScaleFactorRoundingPolicy(Qt.HighDpiScaleFactorRoundingPolicy.PassThrough)
 
         if sys.platform.startswith("linux"):
-            from util.linux_desktop import ensure_linux_desktop_entry
+            from util.linux_desktop import ensure_linux_desktop_entry, install_qt_message_filter
+
+            install_qt_message_filter()
             ensure_linux_desktop_entry()
             QGuiApplication.setDesktopFileName("DazedMTLTool")
 
diff --git a/scripts/start_gui.py b/scripts/start_gui.py
index ef1ee19..b35faa6 100644
--- a/scripts/start_gui.py
+++ b/scripts/start_gui.py
@@ -7,6 +7,11 @@ from pathlib import Path
 PROJECT_ROOT = Path(__file__).resolve().parent.parent
 sys.path.insert(0, str(PROJECT_ROOT))
 
+if sys.platform.startswith("linux"):
+    from util.linux_desktop import configure_qt_platform
+
+    configure_qt_platform()
+
 
 def check_dependencies():
     """Check if required dependencies are installed."""
diff --git a/util/linux_desktop.py b/util/linux_desktop.py
index 541c439..759a3ac 100644
--- a/util/linux_desktop.py
+++ b/util/linux_desktop.py
@@ -12,6 +12,42 @@ from util.paths import ICON_PATH, PROJECT_ROOT
 DESKTOP_ID = "DazedMTLTool"
 LAUNCH_SCRIPT = PROJECT_ROOT / "scripts" / "launch.sh"
 
+# Qt logs this on Wayland whenever a dialog tries to steal focus (harmless noise).
+_WAYLAND_ACTIVATE_WARNING = "Wayland does not support QWindow::requestActivate()"
+
+
+def _append_qt_logging_rule(rule: str) -> None:
+    category = rule.split("=", 1)[0]
+    existing = os.environ.get("QT_LOGGING_RULES", "")
+    if category in existing:
+        return
+    os.environ["QT_LOGGING_RULES"] = f"{existing};{rule}" if existing else rule
+
+
+def configure_qt_platform() -> None:
+    """Apply Linux/Qt environment tweaks before constructing QApplication."""
+    if not sys.platform.startswith("linux"):
+        return
+    _append_qt_logging_rule("qt.qpa.wayland=false")
+
+
+def install_qt_message_filter() -> None:
+    """Drop the noisy Wayland requestActivate warning (QT rules miss some builds)."""
+    if not sys.platform.startswith("linux"):
+        return
+    try:
+        from PyQt5.QtCore import QtMsgType, qInstallMessageHandler
+    except ImportError:
+        return
+
+    def _handler(mode, _context, message):
+        if _WAYLAND_ACTIVATE_WARNING in message:
+            return
+        if mode in (QtMsgType.QtWarningMsg, QtMsgType.QtCriticalMsg, QtMsgType.QtFatalMsg):
+            print(message, file=sys.stderr)
+
+    qInstallMessageHandler(_handler)
+
 
 def installed_desktop_path() -> Path:
     data_home = os.environ.get("XDG_DATA_HOME", "")