diff --git a/src/util/externalcommand.cpp b/src/util/externalcommand.cpp
index 6b51017..caa4c2c 100644
--- a/src/util/externalcommand.cpp
+++ b/src/util/externalcommand.cpp
@@ -141,8 +141,7 @@ bool ExternalCommand::start(int timeout)
                                                  CoreBackendManager::self()->privateKey().signMessage(hash, QCA::EMSA3_Raw),
                                                  cmd,
                                                  args(),
-                                                 d->m_Input,
-                                                 QStringList());
+                                                 d->m_Input);
 
         QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pcall, this);
 
diff --git a/src/util/externalcommandhelper.cpp b/src/util/externalcommandhelper.cpp
index 1f7f14b..02b388c 100644
--- a/src/util/externalcommandhelper.cpp
+++ b/src/util/externalcommandhelper.cpp
@@ -26,9 +26,6 @@
 
 #include <KLocalizedString>
 
-// exit helper if no ping for 42s
-#define TIMEOUT 42000
-
 /** Initialize ExternalCommandHelper Daemon and prepare DBus interface
 */
 ActionReply ExternalCommandHelper::init(const QVariantMap& args)
@@ -198,8 +195,9 @@ bool ExternalCommandHelper::copyblocks(const QString& Uuid, const QString& sourc
     return rval;
 }
 
-QVariantMap ExternalCommandHelper::start(const QByteArray& signature, const QString& command, const QStringList& arguments, const QByteArray& input, const QStringList& environment)
+QVariantMap ExternalCommandHelper::start(const QByteArray& signature, const QString& command, const QStringList& arguments, const QByteArray& input)
 {
+    QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
     QVariantMap reply;
 
     QByteArray request;
@@ -217,7 +215,7 @@ QVariantMap ExternalCommandHelper::start(const QByteArray& signature, const QStr
 
 //     connect(&cmd, &QProcess::readyReadStandardOutput, this, &ExternalCommandHelper::onReadOutput);
 
-    m_cmd.setEnvironment(environment);
+    m_cmd.setEnvironment( { QStringLiteral("LVM_SUPPRESS_FD_WARNINGS=1") } );
     m_cmd.start(command, arguments);
     m_cmd.write(input);
     m_cmd.closeWriteChannel();
diff --git a/src/util/externalcommandhelper.h b/src/util/externalcommandhelper.h
index 05d48c1..4795399 100644
--- a/src/util/externalcommandhelper.h
+++ b/src/util/externalcommandhelper.h
@@ -43,7 +43,7 @@ public:
 
 public Q_SLOTS:
     ActionReply init(const QVariantMap& args);
-    Q_SCRIPTABLE QVariantMap start(const QByteArray& signature, const QString& command, const QStringList& arguments, const QByteArray& input, const QStringList& environment);
+    Q_SCRIPTABLE QVariantMap start(const QByteArray& signature, const QString& command, const QStringList& arguments, const QByteArray& input);
     Q_SCRIPTABLE bool copyblocks(const QString& Uuid, const QString& sourceDevice, const qint64 sourceFirstByte, const qint64 sourceLength, const QString& targetDevice, const qint64 targetFirstByte, const qint64 blockSize);
     Q_SCRIPTABLE void exit(const QString& Uuid);