XDPYINFO(1)                                              General Commands Manual                                             XDPYINFO(1)

NAME
       xdpyinfo - display information utility for X

SYNOPSIS
       xdpyinfo [-display displayname] [-queryExtensions] [-ext extension-name] [-version]

DESCRIPTION
       Xdpyinfo is a utility for displaying information about an X server.  It is used to examine the capabilities of a server, the pre‐
       defined values for various parameters used in communicating between clients and the server, and the different  types  of  screens
       and visuals that are available.

       By  default,  numeric  information (opcode, base event, base error) about protocol extensions is not displayed.  This information
       can be obtained with the -queryExtensions option.  Use of this option on servers that dynamically  load  extensions  will  likely
       cause all possible extensions to be loaded, which can be slow and can consume significant server resources.

       Detailed  information about a particular extension is displayed with the -ext extensionName option.  If extensionName is all, in‐
       formation about all extensions supported by both xdpyinfo and the server is displayed.

       If -version is specified, xdpyinfo prints its version and exits, without contacting the X server.

ENVIRONMENT
       DISPLAY To get the default host, display number, and screen.

SEE ALSO
       X(7), xprop(1), xrdb(1), xwininfo(1), xrandr(1), xdriinfo(1), xvinfo(1), glxinfo(1)

AUTHOR
       Jim Fulton, MIT X Consortium
       Support for the XFree86-VidModeExtension, XFree86-DGA, XFree86-Misc, and XKB extensions added by Joe Moss

X Version 11                                                 xdpyinfo 1.3.2                                                  XDPYINFO(1)

usage:  xdpyinfo [options]
-display displayname    server to query
-version                print program version and exit
-queryExtensions        print info returned by XQueryExtension
-ext all                print detailed info for all supported extensions
-ext extension-name     print detailed info for extension-name if one of:
     MIT-SHM XKEYBOARD Multi-Buffering SHAPE SYNC XFree86-DGA 
     XFree86-VidModeExtension XTEST DOUBLE-BUFFER RECORD XInputExtension 
     RENDER Composite XINERAMA