Copy bits from parent window when allocating pixmaps so that Background ==

None works.
Copy filter to backing picture during validation.
Mark picture serialNumber when setting Filter or Transform so Validate
    occurs.
Initialize xf86Screens[i]->pScreen to NULL so that RADEON driver doesn't
    crash during server reset using old pScreen.

render/picture.c

@@ -1177,6 +1177,8 @@ SetPictureTransform (PicturePtr	    pPicture,
 	    pPicture->transform = 0;
 	}
     }
+    pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT;
+
     return Success;
 }
 
@@ -1188,6 +1190,7 @@ CopyPicture (PicturePtr	pSrc,
     PictureScreenPtr ps = GetPictureScreen(pSrc->pDrawable->pScreen);
     Mask origMask = mask;
 
+    pDst->serialNumber |= GC_CHANGE_SERIAL_BIT;
     pDst->stateChanges |= mask;
 
     while (mask) {