QSound in embedded ubuntu: using null output device none available

[maatong]

Hi all:
I'm a beginner of Qt, now I'm working on a small program which can play wav files with QSound.
I tried to run the program on my PC which runs ubuntu 12.04, it worked.
But when I tried to run it on the ARM system, there's a error notice read that:

using null output device none available.

So could anyone help me with that error?
Is it because I missed some libs or other resources?

Thanks a lot.

The codes are here:
(It's a Qt console program)
audio.pro:

QT       += core
 
CONFIG +=qt thread
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets multimedia
 
QT       -= gui
 
TARGET = audioconsole
#   target.files=audioconsole
#   target.path=/home/ubuntu/audioconsole
 
#INSTALLS == target
 
 
CONFIG   += console
CONFIG   -= app_bundle
 
TEMPLATE = app
 
 
SOURCES += main.cpp

QT       += core

CONFIG +=qt thread
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets multimedia

QT       -= gui

TARGET = audioconsole
#   target.files=audioconsole
#   target.path=/home/ubuntu/audioconsole

#INSTALLS == target


CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp

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And the main.cpp file

#include <QCoreApplication>
#include <QSound>
#include <stdio.h>
 
QSound player("/home/ubuntu/audioconsole/affirmative.wav");
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    printf("audio test\n");
 
    player.play();
 
    printf("succeed\n");
 
    return a.exec();
 
}

#include <QCoreApplication>
#include <QSound>
#include <stdio.h>

QSound player("/home/ubuntu/audioconsole/affirmative.wav");

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

    printf("audio test\n");

    player.play();

    printf("succeed\n");

    return a.exec();

}

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[Lesiok]

Use method QSound::isAvailable() to test if sound system is available.