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--- doc:de-compat [2017/08/13 12:13]
stefanbaur [Compatibility and Workarounds depend on what version] updated KDE 5 info
+++ doc:de-compat [2023/01/25 15:44] (current)
uli42 [Explanation] add link to libgl workaround
@@ Line 8: / Line 8: @@
 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.) Therefore, there are 4 reasons why certain modern "3d-ish" desktops are incompatible with nxagent, and therefore X2Go.
+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-  * The desktop environment requires a newer version of the X11 extension "GLX" (OpenGL) than nxagent 3.5.0.x and X.org 6.9 provide (version 1.2).
+  * The desktop environment requires a newer version of the X11 extension "GLX" (OpenGL) than nxagent 3.5.0.x and X.org 6.9 provide (version 1.2).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]]
-  * The desktop environment requires a newer version of the X11 extension "XRANDR" than nxagent 3.5.0.x provides (version 1.2).
+  *<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 The desktop environment requires a newer version of the X11 extension "XRANDR" than nxagent 3.5.0.x provides (version 1.2).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.
@@ Line 20: / Line 20: @@
 ==== Always Compatible and no Workarounds Required ====
-  - LXDE (not LXQt)
+  * LXDE (not LXQt)
-  - XFCE
+  * XFCE
-  - MATE
+<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>
@@ Line 49: / Line 60: @@
   * 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'').

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