diff -Nurp patched/src/atombios_output.c working/src/atombios_output.c
--- patched/src/atombios_output.c	2008-10-03 19:47:25.000000000 -0700
+++ working/src/atombios_output.c	2008-10-03 19:51:08.000000000 -0700
@@ -618,7 +618,15 @@ dfp_disable_dither(xf86OutputPtr output,
 	else
 	    OUTREG(AVIVO_DVOA_BIT_DEPTH_CONTROL, 0); /* DVO */
 	break;
-    /*case ATOM_DEVICE_LCD1_SUPPORT:*/ /* LVDS panels need dither enabled */
+    case ATOM_DEVICE_LCD1_SUPPORT:
+        /* LVDS panels need dither enabled */
+        if ((info->ChipFamily == CHIP_FAMILY_RV530)) {
+            /* Enable dithering for the RV530 chipset */
+            long int dither_flags = (1 << 14) | (1 << 16) | (1 << 21) | (1 << 24);
+            OUTREG(AVIVO_LVTMA_BIT_DEPTH_CONTROL, dither_flags); /* LVTMA */
+            OUTREG(AVIVO_TMDSA_BIT_DEPTH_CONTROL, dither_flags); /* TMDSA */
+        }
+        break;
     case ATOM_DEVICE_DFP3_SUPPORT:
         /* On DCE3 chips, the block layout changed */
         if ((info->ChipFamily == CHIP_FAMILY_RV620) ||