diff --git a/ch7036_monitor.c b/ch7036_monitor.c
index 75fda52..547b6d9 100644
--- a/ch7036_monitor.c
+++ b/ch7036_monitor.c
@@ -220,7 +220,16 @@
     1,  1,  1,
     2160,  1600,112, 168,   1245,1200,  3,    4  ,
     MK_SCALE(0, 0),
- },
+  },
+  // CVT 1920x1200 reduced blanking modeline (not from chrontel)
+  // (As well as CVT this matches Dell monitor DTD)
+  {
+    154000,
+    MK_PIXEL_HDMI(1, 0, 0),
+    1,  0,  1,
+    2080,  1920, 48, 32,   1235,1200,  3,    6 ,
+    MK_SCALE(0, 0),
+  },
 
 
 };
@@ -467,6 +476,8 @@
     native_aspect = force_aspect;
   else
     native_aspect = find_aspect_fromisize(data);
+  if (verbose) printf("Check standard modes (monitor native aspect %s)\n",
+                      aspect_to_str[native_aspect]);
 
   for(i=0; i < (EDID_N_STDTIME + KNOWN_EST_TIMES); i++) {
     int hinfo = 0x01;
@@ -502,10 +513,14 @@
     hres = (hinfo * STDTIME_HMULT) + STDTIME_HBASE;
     if (verbose) printf("Found %d wide %s\n", hres,
                         aspect_to_str[vinfo>>STDTIME_VASPECT_SHIFT]);
-    if ((force_maxw > 0) && (hres > force_maxw)) continue;
-
-    if (verbose) printf("Try %d wide %s\n", hres,
-                        aspect_to_str[vinfo>>STDTIME_VASPECT_SHIFT]);
+    if ((force_maxw > 0) && (hres > force_maxw)) {
+      if (verbose) printf("-- ignore because greater than forced max width\n");
+      continue;
+    }
+    if (hres > CH_MAX_HRES) {
+      if (verbose) printf("-- too wide for scaler\n");
+      continue;
+    }
 
     switch (vinfo >> STDTIME_VASPECT_SHIFT) {
     case ASPECT_16_10:
@@ -561,7 +576,8 @@
           curbest_aspect = (vinfo >> STDTIME_VASPECT_SHIFT);
         }
       }
-    }
+    } else if (verbose) printf("-- no match in known_modes table\n");
+
   }
   if (curbest != NULL) {
     *mon = curbest;
diff --git a/edid_utils.c b/edid_utils.c
index 05afa5f..47a6380 100644
--- a/edid_utils.c
+++ b/edid_utils.c
@@ -169,8 +169,29 @@
   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xdd
 };
 
+/* Has DTD that is too wide */
+unsigned char test_edid6[256] = {
+  0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
+  0x10, 0xac, 0x63, 0x40, 0x4c, 0x35, 0x31, 0x33,
+  0x0c, 0x15, 0x01, 0x03, 0x80, 0x40, 0x28, 0x78,
+  0xea, 0x8d, 0x85, 0xad, 0x4f, 0x35, 0xb1, 0x25,
+  0x0e, 0x50, 0x54, 0xa5, 0x4b, 0x00, 0x71, 0x4f,
+  0x81, 0x00, 0x81, 0x80, 0xa9, 0x40, 0xd1, 0x00,
+  0xd1, 0x40, 0x01, 0x01, 0x01, 0x01, 0xe2, 0x68,
+  0x00, 0xa0, 0xa0, 0x40, 0x2e, 0x60, 0x30, 0x20,
+  0x36, 0x00, 0x81, 0x91, 0x21, 0x00, 0x00, 0x1a,
+  0x00, 0x00, 0x00, 0xff, 0x00, 0x50, 0x48, 0x35,
+  0x4e, 0x59, 0x31, 0x33, 0x4d, 0x33, 0x31, 0x35,
+  0x4c, 0x0a, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x44,
+  0x45, 0x4c, 0x4c, 0x20, 0x55, 0x33, 0x30, 0x31,
+  0x31, 0x0a, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd,
+  0x00, 0x31, 0x56, 0x1d, 0x71, 0x1c, 0x00, 0x0a,
+  0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0xb0
+};
+
 static unsigned char *test_edids[N_TEST_EDIDS] = {
-  test_edid1, test_edid2, test_edid3, test_edid4, test_edid5
+  test_edid1, test_edid2, test_edid3, test_edid4, test_edid5,
+  test_edid6
 };
 
 int get_test_edid(int n, unsigned char *dst)
diff --git a/edid_utils.h b/edid_utils.h
index 89356af..1098eb2 100644
--- a/edid_utils.h
+++ b/edid_utils.h
@@ -167,7 +167,7 @@
 #define COL_META 3
 
 /* Number of test EDID arrays available to get/show_test_edid */
-#define N_TEST_EDIDS 5
+#define N_TEST_EDIDS 6
 
 int edid_valid(unsigned char *edid_data);
 int edid_has_hdmi_info(unsigned char *edid_data, int ext);