diff --git a/poky/meta/lib/oeqa/targetcontrol.py b/poky/meta/lib/oeqa/targetcontrol.py
index 1445e3e..2aa548e 100644
--- a/poky/meta/lib/oeqa/targetcontrol.py
+++ b/poky/meta/lib/oeqa/targetcontrol.py
@@ -117,9 +117,9 @@
         import oe.path
         bb.utils.mkdirhier(self.testdir)
         self.qemurunnerlog = os.path.join(self.testdir, 'qemurunner_log.%s' % self.datetime)
-        loggerhandler = logging.FileHandler(self.qemurunnerlog)
-        loggerhandler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
-        self.logger.addHandler(loggerhandler)
+        self.loggerhandler = logging.FileHandler(self.qemurunnerlog)
+        self.loggerhandler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
+        self.logger.addHandler(self.loggerhandler)
         oe.path.symlink(os.path.basename(self.qemurunnerlog), os.path.join(self.testdir, 'qemurunner_log'), force=True)
 
         if d.getVar("DISTRO") == "poky-tiny":
@@ -143,7 +143,8 @@
                             use_kvm = use_kvm,
                             dump_dir = dump_dir,
                             dump_host_cmds = d.getVar("testimage_dump_host"),
-                            logger = logger)
+                            logger = logger,
+                            serial_ports = len(d.getVar("SERIAL_CONSOLES").split()))
 
         self.target_dumper = TargetDumper(dump_target_cmds, dump_dir, self.runner)
 
@@ -182,6 +183,7 @@
 
     def stop(self):
         self.runner.stop()
+        self.logger.removeHandler(self.loggerhandler)
         self.connection = None
         self.ip = None
         self.server_ip = None