X display manager (program type) X显示管理器
（重定向自X Display Manager Control Protocol）
![A login screen shown by the KDM display manager.](/Images/godic/202502/21/KDM5318.jpg")
![In the X Window System, the X server runs on the computer in front of the user. The X server may connect to a display manager running on another computer, starting a session which may comprise a variety of programs running on that other computer.](/Images/godic/202502/21/Xserver_and_display_manager.svg5318.png")
![Una pantalla de login mostrada por el gestor de pantalla KDM.](/Images/godic/202502/21/Kubuntu_8.04_login_screen5318.png")
![Screenshot eines typischen xdm-Dialoges](/Images/godic/202502/21/Xdm_Screenshot5318.png")
In the X Window System, an X display manager is a graphical login manager which starts a session on an X server from the same or another computer.
A display manager presents the user with a login screen. A session starts when a user successfully enters a valid combination of username and password.