Reinitialize DGA mode list whenever we update the global list.

DGA has a copy of the current mode list (yes, this is broken).
Regenerate it whenever the ddx mode list changes.

src/i830.h

@@ -508,6 +508,7 @@ extern void I830SelectBuffer(ScrnInfoPtr pScrn, int buffer);
 extern void I830RefreshRing(ScrnInfoPtr pScrn);
 extern void I830EmitFlush(ScrnInfoPtr pScrn);
 
+extern Bool I830DGAReInit(ScreenPtr pScreen);
 extern Bool I830DGAInit(ScreenPtr pScreen);
 
 #ifdef I830_XV

src/i830_dga.c

@@ -83,8 +83,8 @@ DGAFunctionRec I830DGAFuncs = {
 #endif
 };
 
-Bool
-I830DGAInit(ScreenPtr pScreen)
+static DGAModePtr
+I830DGAModes (ScreenPtr pScreen, int *nump)
 {
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    I830Ptr pI830 = I830PTR(pScrn);
@@ -93,8 +93,6 @@ I830DGAInit(ScreenPtr pScreen)
    int Bpp = pScrn->bitsPerPixel >> 3;
    int num = 0;
 
-   MARKER();
-
    pMode = firstMode = pScrn->modes;
 
    while (pMode) {
@@ -103,7 +101,7 @@ I830DGAInit(ScreenPtr pScreen)
 
       if (!newmodes) {
 	 xfree(modes);
-	 return FALSE;
+	 return NULL;
       }
       modes = newmodes;
 
@@ -159,7 +157,42 @@ I830DGAInit(ScreenPtr pScreen)
       if (pMode == firstMode)
 	 break;
    }
+   *nump = num;
+   return modes;
+}
 
+Bool
+I830DGAReInit(ScreenPtr pScreen)
+{
+   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+   I830Ptr pI830 = I830PTR(pScrn);
+   int num;
+   DGAModePtr  modes;
+   
+   modes = I830DGAModes (pScreen, &num);
+   if (!modes)
+      return FALSE;
+   
+   if (pI830->DGAModes)
+      xfree (pI830->DGAModes);
+   
+   pI830->numDGAModes = num;
+   pI830->DGAModes = modes;
+   return DGAReInitModes (pScreen, modes, num);
+}
+
+Bool
+I830DGAInit(ScreenPtr pScreen)
+{
+   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+   I830Ptr pI830 = I830PTR(pScrn);
+   int num;
+   DGAModePtr  modes;
+   
+   modes = I830DGAModes (pScreen, &num);
+   if (!modes)
+      return FALSE;
+   
    pI830->numDGAModes = num;
    pI830->DGAModes = modes;
 

src/i830_driver.c

@@ -3600,6 +3600,7 @@ I830CheckDevicesTimer(OsTimerPtr timer, CARD32 now, pointer arg)
       
       xf86ProbeOutputModes (pScrn);
       xf86SetScrnInfoModes (pScrn);
+      I830DGAReInit (pScrn->pScreen);
       xf86SwitchMode(pScrn->pScreen, pScrn->currentMode);
 
       /* Clear the BIOS's hotkey press flags */

src/i830_randr.c

@@ -97,6 +97,7 @@ xf86RandR12GetInfo (ScreenPtr pScreen, Rotation *rotations)
     /* Re-probe the outputs for new monitors or modes */
     xf86ProbeOutputModes (scrp);
     xf86SetScrnInfoModes (scrp);
+    I830DGAReInit (pScreen);
 
     for (mode = scrp->modes; ; mode = mode->next)
     {
@@ -787,6 +788,7 @@ xf86RandR12GetInfo12 (ScreenPtr pScreen, Rotation *rotations)
 
     xf86ProbeOutputModes (pScrn);
     xf86SetScrnInfoModes (pScrn);
+    I830DGAReInit (pScreen);
     return xf86RandR12SetInfo12 (pScreen);
 }