disable r300 chips. R300_FORCE_R300 to force

diff --git a/src/mesa/drivers/dri/radeon/radeon_screen.c b/src/mesa/drivers/dri/radeon/radeon_screen.c
index 48197bd83cc08487e9809e3315f0f908d5a2037e..6bb15553a63453da46f6f5877290e14136b623c5 100644 (file)
--- a/src/mesa/drivers/dri/radeon/radeon_screen.c
+++ b/src/mesa/drivers/dri/radeon/radeon_screen.c
@@ -637,6 +637,14 @@ radeonCreateScreen( __DRIscreenPrivate *sPriv )
              dri_priv->deviceID);
       return NULL;
    }
+   if (screen->chip_family == CHIP_FAMILY_RS300 || 
+       screen->chip_family == CHIP_FAMILY_R300) {
+          if (getenv("R300_FORCE_R300") == NULL) {
+                  fprintf(stderr, "Radeon 9500/9700 cards are not currently stable.\n");
+                  fprintf(stderr, "More details can be found at https://bugs.freedesktop.org/show_bug.cgi?id=6318\n");
+                  return NULL;
+          }
+   }
 
    if (screen->chip_family <= CHIP_FAMILY_RS200)
       screen->chip_flags |= RADEON_CLASS_R100;