Hand-apply patches (framebuffer alloc) from Authentic8 branch: 15ba9cc409e8f57e1800abcd52e77ed409b6cc17

xorg/X11R7.6/rdp/rdpmain.c

@@ -273,7 +273,7 @@ rdpScreenInit(int index, ScreenPtr pScreen, int argc, char **argv)
         g_rdpScreen.sizeInBytes =
             (g_rdpScreen.paddedWidthInBytes * g_rdpScreen.height);
         ErrorF("buffer size %d\n", g_rdpScreen.sizeInBytes);
-        g_rdpScreen.pfbMemory = (char *)g_malloc(2048 * 2048 * 4, 1);
+        g_rdpScreen.pfbMemory = (char *)g_malloc(g_rdpScreen.sizeInBytes, 1);
     }
 
     if (g_rdpScreen.pfbMemory == 0)

xorg/X11R7.6/rdp/rdprandr.c

@@ -156,6 +156,8 @@ rdpRRScreenSetSize(ScreenPtr pScreen, CARD16 width, CARD16 height,
         ErrorF("  resizing screenPixmap [%p] to %dx%d, currently at %dx%d\n",
                (void *)screenPixmap, width, height,
                screenPixmap->drawable.width, screenPixmap->drawable.height);
+        g_free(g_rdpScreen.pfbMemory);
+        g_rdpScreen.pfbMemory = g_malloc(g_rdpScreen.sizeInBytes, 1);
         pScreen->ModifyPixmapHeader(screenPixmap, width, height,
                                     g_rdpScreen.depth, g_rdpScreen.bitsPerPixel,
                                     g_rdpScreen.paddedWidthInBytes,