Qt d-bus don't receive signal form udisks

stima_ua

Hello All,

I try to handle usb devices changes (remove/add). It's my code:

/.h/
@
#ifndef UDISKS_H
#define UDISKS_H

#include <QObject>
#include <QDBusObjectPath>

class UDisks : public QObject
{
Q_OBJECT

public:
UDisks(QObject *parent = 0);

public slots:
void device_added(QDBusObjectPath);
void device_removed(QDBusObjectPath);
};

#endif // UDISKS_H
@

/.cpp/
@
#include "udisks.h"

#include <QtDBus>
#include <QDebug>

const char *udisk_srv = "org.freedesktop.UDisks";
const char *udisk_path = "/org/freedesktop/UDisks";
const char *udisk_iface = "org.freedesktop.UDisks";
const char *udisk_devadd = "DeviceAdded";
const char *udisk_devrmv = "DeviceRemoved";
const char *udisk_devsig = "o";

UDisks::UDisks(QObject *parent) : QObject(parent)
{
qDebug() << "added was connected: "
<< QDBusConnection::systemBus().connect(udisk_srv, udisk_path, udisk_iface, udisk_devrmv,
this, SLOT(device_added(QDBusObjectPath)));

qDebug() << "removed was connected: "
         << QDBusConnection::systemBus().connect(udisk_srv, udisk_path, udisk_iface, udisk_devrmv,
                                     this, SLOT(device_removed(QDBusObjectPath)));

}

void UDisks::device_added(QDBusObjectPath)
{
qDebug() << "adedd";
}

void UDisks::device_removed(QDBusObjectPath)
{
qDebug() << "removed";
}
@

/main/
@
#include <QCoreApplication>

#include "udisks.h"

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

UDisks udisks;

return a.exec&#40;&#41;;

}
@

But its not work when I add or remove some USB device.
Some additional info: Ubuntu 12.04 x64, Qt 5.1.0, gcc x64.