diff --git a/docs/xlibdriver.rst b/docs/xlibdriver.rst
index 000bfe36607..daa84116873 100644
--- a/docs/xlibdriver.rst
+++ b/docs/xlibdriver.rst
@@ -64,32 +64,6 @@ blending will require a round-trip message for pixel readback.)
 Experiment with the MESA_BACK_BUFFER variable to see which is faster for
 your application.
 
-Colormaps
----------
-
-When using Mesa directly or with GLX, it's up to the application writer
-to create a window with an appropriate colormap. The GLUT toolkit tries
-to minimize colormap *flashing* by sharing colormaps when possible.
-Specifically, if the visual and depth of the window matches that of the
-root window, the root window's colormap will be shared by the Mesa
-window. Otherwise, a new, private colormap will be allocated.
-
-When sharing the root colormap, Mesa may be unable to allocate the
-colors it needs, resulting in poor color quality. This can happen when a
-large number of colorcells in the root colormap are already allocated.
-
-Overlay Planes
---------------
-
-Hardware overlay planes are supported by the Xlib driver. To determine
-if your X server has overlay support you can test for the
-SERVER_OVERLAY_VISUALS property:
-
-.. code-block:: sh
-
-   xprop -root | grep SERVER_OVERLAY_VISUALS
-
-
 Extensions
 ----------