1 files changed, 18 insertions, 0 deletions
diff --git a/src/radeon_driver.c b/src/radeon_driver.c
index 7cac321f..8a28f3f2 100644
--- a/src/radeon_driver.c
+++ b/src/radeon_driver.c
@@ -2964,6 +2964,24 @@ Bool RADEONPreInit(ScrnInfoPtr pScrn, int flags)
       goto fail;
    }
 
+    /* fix up cloning on rn50 cards
+     * since they only have one crtc sometimes the xserver doesn't assign
+     * a crtc to one of the outputs even though both outputs have common modes
+     * which results in only one monitor being enabled.  Assign a crtc here so
+     * that both outputs light up.
+     */
+    if (info->ChipFamily == CHIP_FAMILY_RV100 && !pRADEONEnt->HasCRTC2) {
+	int i;
+
+	for (i = 0; i < xf86_config->num_output; i++) {
+	    xf86OutputPtr output = xf86_config->output[i];
+
+	    /* XXX: double check crtc mode */
+	    if ((output->probed_modes != NULL) && (output->crtc == NULL))
+		output->crtc = xf86_config->crtc[0];
+	}
+    }
+
     ErrorF("after xf86InitialConfiguration\n");
 
     RADEONSetPitch(pScrn);