commit 2a2008e2bb663834da4ac49f249fcd7421d914c7
Author: Mariusz Bialonczyk <manio@skyboo.net>
Date:   Sat Mar 18 07:15:17 2017 +0100

    TST

diff --git a/hw/xfree86/common/xf86cmap.c b/hw/xfree86/common/xf86cmap.c
index 8588c9fba..c43aceec9 100644
--- a/hw/xfree86/common/xf86cmap.c
+++ b/hw/xfree86/common/xf86cmap.c
@@ -155,6 +155,9 @@ xf86HandleColormaps(ScreenPtr pScreen,
     int *indices;
     int elements;
 
+    if (xf86_crtc_supports_gamma(pScrn))
+      return TRUE;
+
     if (!maxColors || !sigRGBbits ||
         (!loadPalette && !xf86_crtc_supports_gamma(pScrn)))
         return FALSE;