1c3e51daba
Avoids a crash in xf86RotatePrepare -> DamageRegister during CreateScreenResources if rotation or another transform is configured for any connected RandR output in xorg.conf. The generic rotation/transform code generally can't work without the root window currently. Closes: https://gitlab.freedesktop.org/xorg/xserver/issues/969 Fixes:094f42cdfe"xfree86/modes: Call xf86RotateRedisplay from xf86CrtcRotate" Acked-by: Olivier Fourdan <ofourdan@redhat.com> Reviewed-by: Adam Jackson <ajax@redhat.com> (cherry picked from commit6a5e47c57d)
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
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