1st

    vi /usr/share/applications/qt.desktop

   前提qt程式放到/home/linaro/myqt/  

[Desktop Entry]
Version=1.0
Name=testQT
Exec=/home/linaro/myqt/testQT
StartupNotify=false
NoDisplay=true
Type=Application
Categories=System;Utility;Archiving;

     cp /usr/share/applications/qt.desktop /etc/xdg/autostart/

3st   -->重新開機 啟動有效

     # reboot

4st  -->去掉休眠功能！測試OK

   a: 禁止xfce4-power-manager開機啟動

1 cd  /etc/xdg/autostart/  

mv xfce4-power-manager.desktop  xfce4-power-manager.desktop_old

2 cd /usr/share/applications/

mv  xfce4-power-manager-settings.desktop  xfce4-power-manager-settings.desktop_old

   b:  vi  vi /etc/X11/xorg.conf

#add by jiangdou

Section "Monitor"
        Identifier   "Monitor0"
        Option "DPMS" "false"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection


Section "ServerFlags"
        Option "BlankTime" "0"
        Option "StandbyTime" "0"
        Option "SuspendTime" "0"
        Option "OffTime" "0"
EndSection