diff --git a/src/i_video.c b/src/i_video.c
index 7eca9d038..75dd1fbcc 100644
--- a/src/i_video.c
+++ b/src/i_video.c
@@ -1149,11 +1149,13 @@ static void ResetResolution(int height, boolean reset_pitch)
 
     video.unscaledw = (int)(unscaled_actualheight * aspect_ratio);
 
-    video.unscaledw &= ~1;
+    // Unscaled widescreen 16:9 resolution truncates to 426x240, which is not
+    // quite 16:9. To avoid visual instability, we calculate the scaled width
+    // without the actual aspect ratio. For example, at 1280x720 we get
+    // 1278x720.
 
-    video.width = (int)(actualheight * aspect_ratio);
-
-    video.width &= ~1;
+    double vertscale = (double)actualheight / (double)unscaled_actualheight;
+    video.width = (int)ceil(video.unscaledw * vertscale);
 
     // [FG] For performance reasons, SDL2 insists that the screen pitch, i.e.
     // the *number of bytes* that one horizontal row of pixels occupy in
@@ -1176,7 +1178,8 @@ static void ResetResolution(int height, boolean reset_pitch)
     if (automapactive)
       AM_ResetScreenSize();
 
-    I_Printf(VB_DEBUG, "ResetResolution: %dx%d", video.width, video.height);
+    I_Printf(VB_DEBUG, "ResetResolution: %dx%d (%dx%d)",
+        video.width, video.height, video.unscaledw, SCREENHEIGHT);
 
     drs_skip_frame = true;
 }
@@ -1703,7 +1706,7 @@ static struct {
     {  640,  480 },
     {  800,  600 },
     { 1024,  768 },
-    //{ 1280, 1024 },
+    { 1280, 1024 },
     { 1280,  720 },
     { 1280,  800 },
     { 1366,  768 },
@@ -1717,6 +1720,7 @@ static struct {
     { 2304, 1440 },
     { 2560, 1600 },
     { 3200, 2400 },
+    { 3440, 1440 },
     { 3840, 2160 },
     { 5120, 2160 }  
 };
@@ -1750,6 +1754,7 @@ void I_CheckHOM(void)
         {
             printf("HOM %dx%d\n",
                 native_res[curr_test_res - 1].w, native_res[curr_test_res - 1].h);
+            //run_test = false;
             break;
         }
     }
diff --git a/src/r_main.c b/src/r_main.c
index a8b10db25..fdaa52286 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -955,7 +955,8 @@ void R_RenderPlayerView (player_t* player)
   R_SetFuzzPosDraw();
   R_DrawMasked ();
 
-  I_CheckHOM();
+  if (run_test)
+    I_CheckHOM();
 
   // Check for new console commands.
   NetUpdate ();