Initialize asyncio event loop before using it

Python 3.14 (in Fedora 43) throws RunetimeError if event loop is not
initialized before using it.

Resolves: QubesOS/qubes-issues#10188

Author: alimirjamali

qubesidle/idleness_monitor.py

@@ -110,10 +110,13 @@ def main():
     if not os.path.exists('/var/run/qubes-service/shutdown-idle'):
         return
 
+    # Initialize event loop for Python 3.14 compatibility
+    asyncio.set_event_loop(asyncio.new_event_loop())
+
     monitor = IdlenessMonitor()
     monitor.load_watchers()
 
-    asyncio.get_event_loop().run_until_complete(monitor.monitor_idleness())
+    asyncio.run(monitor.monitor_idleness())
 
     subprocess.call(['sudo', 'poweroff'])
 

qubesidle/tests_idleness_monitor.py

@@ -76,6 +76,8 @@ def is_idle(self):
 
 class MonitorTest(unittest.IsolatedAsyncioTestCase):
     def setUp(self):
+        # Initialize event loop for Python 3.14 compatibility
+        asyncio.set_event_loop(asyncio.new_event_loop())
         idleness_monitor.TIMEOUT_SECONDS = LOOP_TIMEOUT
         self.monitor = idleness_monitor.IdlenessMonitor()