Qt，C ++：GConf-WARNING **：客户端无法连接到D-BUS守护程序

Question

我正在尝试使用Qt和C ++在Arch Linux下创建一个表单应用程序，但是当我尝试运行下面的应用程序时：

firstWindow.h

#include <QMainWindow>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>
#include <QLayout>

class firstWindow:public QMainWindow
{
    Q_OBJECT

    public:
        QLabel       *lbl;
        QPushButton  *btn;
        QLineEdit    *row;

    firstWindow():QMainWindow()
    {
        setWindowTitle("First Window");
        QWidget *win = new QWidget(this);
        setCentralWidget(win);

        lbl = new QLabel("Hello Universe", win);
        btn = new QPushButton("Click Click", win);
        row = new QLineEdit(win);

        QVBoxLayout *main = new QVBoxLayout(win);
        main->addWidget(win);

        QHBoxLayout *nextTo = new QHBoxLayout();
        nextTo->addWidget(row);
        nextTo->addWidget(btn);
        main->addLayout(nextTo);

        resize(200,50);
        win->show();
    }
};

编译后，我收到此错误：

#qmake -project
#qmake
#make
# ./QtFirstWindow
(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Qt: Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported

它不会停止或终止应用程序，但它也不会运行它。我认为该错误与我编写的代码无关，因为它只是一个小样本。那我怎么处理呢？有什么想法吗？