Index: /trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp
===================================================================
--- /trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp	(revision 75938)
+++ /trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp	(revision 75939)
@@ -1218,6 +1218,8 @@
     case SVGA_REG_NUM_DISPLAYS:        /* (Deprecated) */
         STAM_REL_COUNTER_INC(&pThis->svga.StatRegNumDisplaysRd);
-        /** @todo keep 1? */
-        *pu32 = 1;  /* Must return something sensible here otherwise the Linux driver will take a legacy code path without 3d support. */
+        /* We must return something sensible here otherwise the Linux driver
+         * will take a legacy code path without 3d support.  This number also
+         * limits how many screens Linux guests will allow. */
+        *pu32 = 32;
         break;