Index: mga/server/mga_dri.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/mga/server/mga_dri.c,v
retrieving revision 1.6
diff -u -r1.6 mga_dri.c
--- mga/server/mga_dri.c	5 Jul 2004 23:42:03 -0000	1.6
+++ mga/server/mga_dri.c	31 Jan 2005 21:40:21 -0000
@@ -805,13 +805,14 @@
     * the clear ioctl to do this, but would need to setup hw state
     * first.
     */
-   memset((char *)ctx->FBAddress + pMga->frontOffset,
-	  0,
-	  pMga->frontPitch * ctx->shared.virtualHeight );
-
-   memset((char *)ctx->FBAddress + pMga->backOffset,
-	  0,
-	  pMga->backPitch * ctx->shared.virtualHeight );
+   {
+      int i;
+      for(i=0;i<pMga->frontPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + pMga->frontOffset + i)=0;
+      
+      for(i=0;i<pMga->backPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + pMga->backOffset + i)=0;
+   }
 
    /* Can release the lock now */
 /*   DRM_UNLOCK(ctx->drmFD, ctx->pSAREA, ctx->serverContext);*/
Index: r128/server/r128_dri.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/r128/server/r128_dri.c,v
retrieving revision 1.12
diff -u -r1.12 r128_dri.c
--- r128/server/r128_dri.c	14 Dec 2004 09:11:53 -0000	1.12
+++ r128/server/r128_dri.c	31 Jan 2005 21:40:21 -0000
@@ -826,13 +826,14 @@
     * the clear ioctl to do this, but would need to setup hw state
     * first.
     */
-   memset((char *)ctx->FBAddress + info->frontOffset,
-	  0,
-	  info->frontPitch * ctx->cpp * ctx->shared.virtualHeight );
-
-   memset((char *)ctx->FBAddress + info->backOffset,
-	  0,
-	  info->backPitch * ctx->cpp * ctx->shared.virtualHeight );
+   {
+      int i;
+      for(i=0;i<info->frontPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + info->frontOffset + i)=0;
+      
+      for(i=0;i<info->backPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + info->backOffset + i)=0;
+   }
     
     pSAREAPriv = (drm_r128_sarea_t *)(((char*)ctx->pSAREA) + 
 					sizeof(drm_sarea_t));
Index: radeon/server/radeon_dri.c
===================================================================
RCS file: /cvs/mesa/Mesa/src/mesa/drivers/dri/radeon/server/radeon_dri.c,v
retrieving revision 1.15
diff -u -r1.15 radeon_dri.c
--- radeon/server/radeon_dri.c	9 Dec 2004 00:18:59 -0000	1.15
+++ radeon/server/radeon_dri.c	31 Jan 2005 21:40:22 -0000
@@ -981,14 +981,14 @@
     * the clear ioctl to do this, but would need to setup hw state
     * first.
     */
-   memset((char *)ctx->FBAddress + info->frontOffset,
-	  0,
-	  info->frontPitch * ctx->cpp * ctx->shared.virtualHeight );
-
-   memset((char *)ctx->FBAddress + info->backOffset,
-	  0,
-	  info->backPitch * ctx->cpp * ctx->shared.virtualHeight );
-
+   {
+      int i;
+      for(i=0;i<info->frontPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + info->frontOffset + i)=0;
+      
+      for(i=0;i<info->backPitch * ctx->cpp * ctx->shared.virtualHeight;i++)
+         *((char *)ctx->FBAddress + info->backOffset + i)=0;
+   }
 
    /* This is the struct passed to radeon_dri.so for its initialization */
    ctx->driverClientMsg = malloc(sizeof(RADEONDRIRec));