diff --git a/src/video/vid_chips_69000.c b/src/video/vid_chips_69000.c
index f53f44754..d91ab1a8b 100644
--- a/src/video/vid_chips_69000.c
+++ b/src/video/vid_chips_69000.c
@@ -743,6 +743,12 @@ chips_69000_recalctimings(svga_t *svga)
         svga->htotal -= 5;
     }
 
+    if (((chips->ext_regs[0x61] & 0x8) && !(chips->ext_regs[0x61] & 0x4))
+        || ((chips->ext_regs[0x61] & 0x2) && !(chips->ext_regs[0x61] & 0x1))) {
+        svga->dpms = 1;
+    } else
+        svga->dpms = 0;
+
     if (chips->ext_regs[0x09] & 0x1) {
         svga->vtotal -= 2;
         svga->vtotal &= 0xFF;
@@ -1543,6 +1549,7 @@ chips_69000_write_ext_reg(chips_69000_t* chips, uint8_t val)
             break;
         case 0x61:
             chips->ext_regs[chips->ext_index] = val & 0x7f;
+            svga_recalctimings(&chips->svga);
             break;
         case 0x62:
             chips->ext_regs[chips->ext_index] = val & 0x9C;
diff --git a/src/video/vid_svga.c b/src/video/vid_svga.c
index d9c2ba892..d60a5de0e 100644
--- a/src/video/vid_svga.c
+++ b/src/video/vid_svga.c
@@ -947,6 +947,15 @@ svga_recalctimings(svga_t *svga)
     /* Inform the user interface of any DPMS mode changes. */
     if (svga->dpms) {
         if (!svga->dpms_ui) {
+            /* Make sure to black out the entire screen to avoid lingering image. */
+            int y_add   = enable_overscan ? svga->monitor->mon_overscan_y : 0;
+            int x_add   = enable_overscan ? svga->monitor->mon_overscan_x : 0;
+            int y_start = enable_overscan ? 0 : (svga->monitor->mon_overscan_y >> 1);
+            int x_start = enable_overscan ? 0 : (svga->monitor->mon_overscan_x >> 1);
+            video_wait_for_buffer_monitor(svga->monitor_index);
+            memset(svga->monitor->target_buffer->dat, 0, svga->monitor->target_buffer->w * svga->monitor->target_buffer->h * 4);
+            video_blit_memtoscreen_monitor(x_start, y_start, svga->monitor->mon_xsize + x_add, svga->monitor->mon_ysize + y_add, svga->monitor_index);
+            video_wait_for_buffer_monitor(svga->monitor_index);
             svga->dpms_ui = 1;
             ui_sb_set_text_w(plat_get_string(IDS_2143));
         }
@@ -1864,14 +1873,14 @@ svga_doblit(int wx, int wy, svga_t *svga)
             p = &svga->monitor->target_buffer->line[i & 0x7ff][0];
 
             for (j = 0; j < (svga->monitor->mon_xsize + x_add); j++)
-                p[j] = svga->overscan_color;
+                p[j] = svga->dpms ? 0 : svga->overscan_color;
         }
 
         for (i = 0; i < bottom; i++) {
             p = &svga->monitor->target_buffer->line[(svga->monitor->mon_ysize + svga->y_add + i) & 0x7ff][0];
 
             for (j = 0; j < (svga->monitor->mon_xsize + x_add); j++)
-                p[j] = svga->overscan_color;
+                p[j] = svga->dpms ? 0 : svga->overscan_color;
         }
     }
 
diff --git a/src/video/video.c b/src/video/video.c
index 710449746..01c398118 100644
--- a/src/video/video.c
+++ b/src/video/video.c
@@ -831,9 +831,9 @@ destroy_bitmap(bitmap_t *b)
 bitmap_t *
 create_bitmap(int x, int y)
 {
-    bitmap_t *b = malloc(sizeof(bitmap_t) + (y * sizeof(uint32_t *)));
+    bitmap_t *b = calloc(sizeof(bitmap_t), (y * sizeof(uint32_t *)));
 
-    b->dat = malloc((size_t) x * y * 4);
+    b->dat = calloc((size_t) x * y, 4);
     for (int c = 0; c < y; c++)
         b->line[c] = &(b->dat[c * x]);
     b->w = x;