diff --git a/Create-DevTerm-A06-OS-image-from-scratch.md b/Create-DevTerm-A06-OS-image-from-scratch.md
index 4be8828..d76e1f8 100644
--- a/Create-DevTerm-A06-OS-image-from-scratch.md
+++ b/Create-DevTerm-A06-OS-image-from-scratch.md
@@ -131,6 +131,7 @@ sudo apt install -y arandr chromium-browser vlc cpupower-gui xfce4-power-manager
 
 ```
 ### Disable Display power management in xfce4 power manager 
+display power management must be disabled ,once the display turn off, you need to reboot to get it back
 ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-power-manager.xml  
 
 ```