|Initial release||November 1993|
|Type||X Window System|
Xsun is an X Window System (X11) display server implementation included with Solaris, developed by Sun Microsystems. It replaced the older Xnews server, which supported the display of not only X11 applications, but also NeWS and SunView programs. Xsun discontinued support for these legacy environments, and added support for Display PostScript.
Xsun was first released as part of Solaris 2.3 in November 1993. It was originally based on X11R5; the version included with Solaris 10 is based on X11R6.6.
Solaris 10 includes both Xsun and the X.Org Server, Xorg, the open-source software reference implementation of X, based on X11R7. The Xorg server was the most commonly used display server on x86 systems, while the Xsun server remained the most commonly used on SPARC systems; Xorg support for SPARC was only added in Solaris 10 8/07, and had very limited driver support. The OpenSolaris project stated that the future direction of X support is the X.Org implementation. Oracle Solaris 11, released in November, 2011, includes only the Xorg server (X.Org 1.10.3). 
- "Chapter 5 What's New in the Solaris 10 8/07 Release". Solaris 10 What's New. Oracle Corporation. 2010. Retrieved 2018-01-31.
- "OpenSolaris Community: X Window System". 2009-08-11. Archived from the original on 2009-09-29. Retrieved 2018-01-31.
We've been working to migrate all of the existing libraries and clients to build from the this source base as well for future Solaris releases, and have almost finished that now.
- "Xorg Family of Servers". Chapter 12: Transitioning From Oracle Solaris 10 to Oracle Solaris 11. 2012. Retrieved 2018-01-31.
While Oracle Solaris 10 includes both the Xsun family of X servers, with Xsun as the default on SPARC platforms, and Xorg as the default on x86 platforms, Oracle Solaris 11 only supports the Xorg family of servers.
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