diff --git a/src/atombios_crtc.c b/src/atombios_crtc.c
index d3fb62b..b83f02e 100644
--- a/src/atombios_crtc.c
+++ b/src/atombios_crtc.c
@@ -304,8 +304,8 @@ atombios_crtc_set_pll(xf86CrtcPtr crtc, DisplayModePtr mode)
 		if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT |
 						    ATOM_DEVICE_DFP_SUPPORT))
 		    pll_flags |= RADEON_PLL_NO_ODD_POST_DIV;
-		if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT))
-		    pll_flags |= (RADEON_PLL_USE_BIOS_DIVS | RADEON_PLL_USE_REF_DIV);
+		//if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT))
+		//pll_flags |= (RADEON_PLL_USE_BIOS_DIVS | RADEON_PLL_USE_REF_DIV);
 	    }
 	}
 
diff --git a/src/legacy_crtc.c b/src/legacy_crtc.c
index b57ba5f..335653e 100644
--- a/src/legacy_crtc.c
+++ b/src/legacy_crtc.c
@@ -1765,8 +1765,10 @@ legacy_crtc_mode_set(xf86CrtcPtr crtc, DisplayModePtr mode,
 	    if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT |
 						ATOM_DEVICE_DFP_SUPPORT))
 		pll_flags |= RADEON_PLL_NO_ODD_POST_DIV;
-	    if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT))
-		pll_flags |= (RADEON_PLL_USE_BIOS_DIVS | RADEON_PLL_USE_REF_DIV);
+	    if (!info->IsAtomBios) {
+		if (radeon_output->active_device & (ATOM_DEVICE_LCD_SUPPORT))
+		    pll_flags |= (RADEON_PLL_USE_BIOS_DIVS | RADEON_PLL_USE_REF_DIV);
+	    }
 	}
     }