Index: /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py
===================================================================
--- /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 68140)
+++ /trunk/src/VBox/ValidationKit/testmanager/batch/virtual_test_sheriff.py	(revision 68141)
@@ -491,4 +491,5 @@
     ktReason_Unknown_File_Not_Found                    = ( 'Unknown',           'File not found' );
     ktReason_Unknown_VM_Crash                          = ( 'Unknown',           'VM crash' );
+    ktReason_Unknown_HalReturnToFirmware               = ( 'Unknown',           'HalReturnToFirmware' );
     ktReason_VMM_kvm_lock_spinning                     = ( 'VMM',               'kvm_lock_spinning' );
     ktReason_Ignore_Buggy_Test_Driver                  = ( 'Ignore',            'Buggy test driver' );
@@ -831,4 +832,9 @@
         _ = dLogs; _ = oCaseFile;
         return (False, None);
+
+    def investigateInfoHalReturnToFirmware(self, oCaseFile, sInfoText, dLogs):
+        """ Investigates HalReturnToFirmware hangs """
+        # hope that's sufficient
+        return (True, ktReason_Unknown_HalReturnToFirmware);
 
     ## Things we search a main or VM log for to figure out why something went bust.
@@ -900,4 +906,5 @@
         # ( Trigger text,                       handler method )
         ( "kvm_lock_spinning",                  investigateInfoKvmLockSpinning ),
+        ( "HalReturnToFirmware",                investigateInfoHalReturnToFirmware ),
     ];