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===== Desktop Environment Compatibility =====

<note>This page is about compatibility with X2Go Server, not with X2Go Client (or PyHoca-GUI or PyHoca-CLI.)

X2Go Client should be able to run under any and every X11-based desktop environment. Wayland-based desktop environments need testing.</note>

==== Explanation ====
X2Go's "X Server" is called "nxagent". It is part of the nx-libs package.

As of version 3.5.0.x, nxagent is forked from the X.org 6.9 codebase (from 2005) feature-wise (but not security-wise, where it is at much newer level). Therefore, there are multiple reasons why certain modern "3d-ish" desktops are incompatible with nxagent, and therefore X2Go.

  * The desktop environment requires the X11 extension "Xcomposite", which nxagent 3.5.0.x and X.org 6.9 do not support.
  * The desktop environment requires a newer version of the X11 extension "GLX" (OpenGL) than nxagent 3.5.0.x and X.org 6.9 provide (version 1.2). Note: there's a workaround for this: [[wiki:development:glx-xlib-workaround]]
  *<del> The desktop environment requires a newer version of the X11 extension "XRANDR" than nxagent 3.5.0.x provides (version 1.2).</del>nxagent offers "XRANDR" 1.5 now, so this no longer a problem.
  * The desktop environment checks for a specific physical graphics driver, but nxagent doesn't use physical graphics adapters/drivers.

Ultimately, addressing issues #1 and #2 requires a lot of work. Solutions are discussed [[wiki:development:new-feature-brainstorming#nx-libs|here.]]

It is recommended to switch to using a compatible desktop environment if your desktop environment is listed below as incompatible.

==== Always Compatible and no Workarounds Required ====
  * LXDE (not LXQt)
  * XFCE

<note>There exists [[https://gitlab.xfce.org/xfce/xfwm4/-/issues/551|a bug]] in either XFCE or X2Go causing rendering issues with the compositor when using X2Go.

Workaround is to disable compositing:


  /usr/bin/xfconf-query -c xfwm4 -p /general/use_compositing -s false

</note>


  * MATE

<note tip>MATE (the fork of GNOME2) is not included with certain distros, such as Ubuntu 12.04 and Ubuntu 14.04. You can however install it from http://mate-desktop.org/ on those 2 versions of Ubuntu and on other distros.</note>

<note important>Ubuntu 14.04 includes some MATE packages, but not enough of them to provide the MATE desktop environment. See the above note about installing MATE on Ubuntu 14.04.</note>

==== Always Compatible, but Trivial Workarounds Required ====
  * IceWM
In X2Go Client, you must specify the Session Type as: Custom Desktop: icewm-session
  * OpenBox
In X2Go Client, You must specify the Session Type as: Custom Desktop: openbox-session

==== Compatibility and Workarounds depend on what version ====
=== GNOME ===
  * GNOME 2: Compatible and no workaround required
  * GNOME 3.0 through 3.6: "GNOME Fallback Mode" must be installed. This is included with most, if not all distros.
  * GNOME 3.8: "GNOME Flasback Mode" 3.8.x must be installed. It is seldom included with distros. There are bugs with it. Using GNOME 3.8 with X2Go is not recommended.
  * GNOME 3.10: "GNOME Flasback Mode" 3.8.x may be compatible, but there are even more bugs with it. It is seldom included with distros. Using GNOME 3.10 with X2Go is not recommended.
  * GNOME 3.12 and later: TBD, but probably not compatible. Using GNOME 3.12 and later with X2Go is not recommended.

<note important>GNOME Classic Mode is not the same as GNOME fallback mode or GNOME Flashback mode. GNOME Classic Mode is not compatible with X2Go.</note>
<note important>We might be able to support Gnome 3.14, especially for RHEL7/EPEL7, given enough $$$ and round tuits (https://en.wiktionary.org/wiki/round_tuit), but support for newer versions seems doubtful, due to certain design decisions made by the Gnome developers.</note>

=== KDE ===
  * KDE 3: Compatible and no workaround required 
  * KDE 4: Compatible and no workaround required 
  * KDE 5: <del>Incompatible due to plasmashell requiring GLX 1.3</del> We have received several reports that KDE 5 now works with X2Go, even though it takes a long time to initialize the session. If you're interested in running KDE 5 via X2Go and run into issues, please join the X2Go-User Mailing List or, if you are certain you've found a bug, subscribe to X2Go-Dev and file a bug report.

For better performance you should set 
''Backend=XRender'' and
''GraphicsSystem=native'' and
''XRenderSmoothScale=false'' in the ''[Compositing]'' section of the ''kwinrc'' (usually residing in ''.kde/share/config'').



=== UNITY ===
  - Ubuntu 12.04: Compatible, as long as package "unity-2d" is installed. By default with "Ubuntu Desktop", it is.
  - Ubuntu 12.10 and later (including 14.04): Not compatible

=== Cinnamon ===
  - Cinnamon 1.4 (Linux Mint 13 "Maya"): Compatible, you must specify the Session Type as: Custom Desktop: gnome-session-cinnamon
  - Cinnamon 2.2 (Linux Mint 17 "Qiana"): Not compatible. Cinnamon reverts to "fallback mode", which is not as good as regular "cinnamon" nor "cinnamon2d". If you wish try try it in anyway, specify the Session Type as: Custom Desktop: cinnamon-session-cinnamon2d

Compatibility issues with Cinnamon are being tracked in bug [[http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=150|150]]
==== Incompatible ====
  - LXQt due to [[http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=637|Qt5 incompatibility]]
=== Compatibility and Workarounds TBD ===
=== Enlightenment ===
  - E17 (Bodhi Linux 24.0, "enlightenment" package version: 20130818-1)
In X2Go Client, You must specify the Session Type as: Custom Desktop: /usr/bin/enlightenment_start

However, bug [[http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=555|555]] (Windows cannot be moved by dragging) was encountered, and not much testing has been done.
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