Recommend using fullscreen on Linux in Fixing jitter and stutter

Stuttering is more common on Linux when playing in windowed mode,
regardless of how powerful the hardware is. This can occur even if
compositing is disabled in the window manager (as tested on KWin).

tutorials/rendering/jitter_stutter.rst

@@ -102,14 +102,16 @@ Linux
 ^^^^^
 
 Stutter may be visible on desktop Linux, but this is usually associated with
-different video drivers and compositors. Some compositors may also trigger this
-problem (e.g. KWin), so it is advised to try using a different one to rule it
-out as the cause. Some window managers such as KWin and Xfwm allow you to
-manually disable compositing, which can improve performance (at the cost of
-tearing).
+different video drivers and compositors. Some compositors may also
+trigger this problem (e.g. KWin), so it is advised to try using a different one
+to rule it out as the cause. Some window managers such as KWin and Xfwm allow
+you to manually disable compositing, which can improve performance (at the cost
+of tearing).
 
 There is no workaround for driver or compositor stuttering, other than reporting
-it as an issue to the driver or compositor developers.
+it as an issue to the driver or compositor developers. Stutter may be more
+present when playing in windowed mode as opposed to fullscreen, even with
+compositing disabled.
 
 `Feral GameMode <https://github.com/FeralInteractive/gamemode>`__ can be used
 to automatically apply optimizations (such as forcing the GPU performance profile)