Xephyr

Xephyr
Three recursive levels of nested Xephyr sessions, running on Linux Mint
Original author(s)	Matthew Allum
Developer(s)	freedesktop.org
Initial release	January 1, 2007; 18 years ago (2007-01-01)
Written in	C
Type	Display server
License	MIT License
Website	freedesktop.org/wiki/Software/Xephyr/

Xephyr is a display server software implementing the X11 display server protocol based on KDrive which targets a window on a host X Server as its framebuffer. It is written by Matthew Allum. Xephyr is an X-on-X implementation and runs on X.Org Server and can work with Glamor.^[1] Future versions could make use of libinput.^{[citation needed]} Replacing Xephyr with the xf86-video-dummy and xf86-video-nested drivers in the normal X.Org server is being considered as part of X11R7.8.^[2]

Unlike the similar Xnest, Xephyr supports modern X extensions (even if the host server does not) such as composite, damage, and randr. It uses SHM images and shadow framebuffer updates to provide good performance. It also has a visual debugging mode for observing screen updates.

Xorg's version of Xephyr uses only software rendering for OpenGL, but Feng Haitao has developed a forked version of Xephyr which can do hardware-accelerated rendering if the underlying X server has the capability.

• Thin client
• rio (windowing system)

• Official website