diff -ur xf86-video-avivo-1.0.0/src/avivo.c xf86-video-avivo-1.0.0.me/src/avivo.c
--- xf86-video-avivo-1.0.0/src/avivo.c	2007-03-03 22:26:39.000000000 +0000
+++ xf86-video-avivo-1.0.0.me/src/avivo.c	2007-03-04 00:59:48.000000000 +0000
@@ -72,6 +72,7 @@
 static const struct pci_id_match avivo_device_match[] = {
     {
 	PCI_VENDOR_ATI, 0x724b, PCI_MATCH_ANY, PCI_MATCH_ANY,
+	PCI_VENDOR_ATI, 0x71c5, PCI_MATCH_ANY, PCI_MATCH_ANY,
 	0x00030000, 0x00ffffff, 0
     },
 
@@ -83,11 +84,13 @@
  * separate, and the nomenclature is beyond reproach. */
 static SymTabRec avivo_chips[] = {
     { PCI_CHIP_R580_724B, "R580 (Radeon X1900 GT)" },
+    { PCI_CHIP_RV530_71C5, "RV530 (Radeon X1600)" },
     { -1,                 NULL }
 };
 
 static PciChipsets avivo_pci_chips[] = {
   { PCI_CHIP_R580_724B, PCI_CHIP_R580_724B, RES_SHARED_VGA },
+  { PCI_CHIP_RV530_71C5, PCI_CHIP_RV530_71C5, RES_SHARED_VGA },
   { -1,                 -1,                 RES_UNDEFINED }
 };
 
@@ -820,6 +823,7 @@
                     int enable)
 {
     int value1, value2, value3, value4, value5;
+    ScrnInfoPtr screen_info = xf86Screens[0];
 
     avivo_wait_idle(avivo);
 
@@ -828,12 +832,12 @@
         value5 = 0x00001010;
 
         if (enable) {
-            value1 = AVIVO_TMDS_MYSTERY1_EN;
+            value1 = AVIVO_TMDS_MYSTERY1_EN | 0x01010000;
             value2 = AVIVO_TMDS_MYSTERY2_EN;
-            value4 = 0x0000001f;
+            value4 = 0x00001f1f;
             if (output->output_num == 2)
                 value4 |= 0x00000020;
-            value5 |= AVIVO_TMDS_EN;
+            value5 |= (AVIVO_TMDS_EN | 0x01000000);
         }
         else {
             value1 = 0x04000000;
@@ -851,7 +855,7 @@
         else if (output->output_num == 2) {
             OUTREG(AVIVO_TMDS2_MYSTERY1, value1);
             OUTREG(AVIVO_TMDS2_MYSTERY2, value2);
-            OUTREG(AVIVO_TMDS2_MYSTERY3, value3 | 0x20000000);
+            OUTREG(AVIVO_TMDS2_MYSTERY3, value3 | 0x00630000);
             OUTREG(AVIVO_TMDS2_CLOCK_CNTL, value4);
             OUTREG(AVIVO_TMDS2_CNTL, value5);
         }
diff -ur xf86-video-avivo-1.0.0/src/avivo.h xf86-video-avivo-1.0.0.me/src/avivo.h
--- xf86-video-avivo-1.0.0/src/avivo.h	2007-03-03 21:54:05.000000000 +0000
+++ xf86-video-avivo-1.0.0.me/src/avivo.h	2007-03-03 23:28:09.000000000 +0000
@@ -46,6 +46,7 @@
 #define AVIVO_DRIVER_VERSION    1000
 
 #define PCI_CHIP_R580_724B      0x724B
+#define PCI_CHIP_RV530_71C5     0x71C5
 
 #define INREG(x) MMIO_IN32(avivo->ctrl_base, x)
 #define OUTREG(x, y) MMIO_OUT32(avivo->ctrl_base, x, y)