Index: sys/dev/vt/hw/fb/vt_fb.c
===================================================================
--- sys/dev/vt/hw/fb/vt_fb.c
+++ sys/dev/vt/hw/fb/vt_fb.c
@@ -174,7 +174,20 @@
 
 	info = vd->vd_softc;
 	c = info->fb_cmap[color];
-	o = info->fb_stride * y + x * FBTYPE_GET_BYTESPP(info);
+
+	if (info->fb_flags & FB_FLAG_ROTATE_270) {
+		o = info->fb_stride * x +
+		    (info->fb_width - y - 1) * FBTYPE_GET_BYTESPP(info);
+	} else if (info->fb_flags & FB_FLAG_ROTATE_90) {
+		o = (info->fb_height -x - 1) * info->fb_stride +
+		    y * FBTYPE_GET_BYTESPP(info);
+	} else if (info->fb_flags & FB_FLAG_ROTATE_180) {
+		o = info->fb_stride * (info->fb_height - y - 1) +
+		    (info->fb_width - x - 1) * FBTYPE_GET_BYTESPP(info);
+
+	} else {
+		o = info->fb_stride * y + x * FBTYPE_GET_BYTESPP(info);
+	}
 
 	if (info->fb_flags & FB_FLAG_NOWRITE)
 		return;
@@ -307,7 +320,19 @@
 			/* Skip pixel write, if mask bit not set. */
 			if (mask != NULL && (mask[byte] & bit) == 0)
 				continue;
-			o = (y + yi) * info->fb_stride + (x + xi) * bpp;
+			if (info->fb_flags & FB_FLAG_ROTATE_270) {
+				o = (x + xi) * info->fb_stride +
+				    (info->fb_width - (y + yi + 1)) * bpp;
+			} else if (info->fb_flags & FB_FLAG_ROTATE_90) {
+				o = (info->fb_height - (x + xi +1)) *
+				    info->fb_stride + (y + yi) * bpp;
+			} else if (info->fb_flags & FB_FLAG_ROTATE_180) {
+				o = (info->fb_height - (y + yi + 1)) *
+				    info->fb_stride +
+				    (info->fb_width - (x + xi + 1)) * bpp;
+			} else {
+				o = (y + yi) * info->fb_stride + (x + xi) * bpp;
+			}
 			o += vd->vd_transpose;
 			cc = pattern[byte] & bit ? fgc : bgc;
 
@@ -467,16 +492,46 @@
 {
 	struct fb_info *info;
 	u_int margin;
-	int bg, err;
+	int bg, rotate, err;
 	term_color_t c;
 
 	info = vd->vd_softc;
-	vd->vd_height = MIN(VT_FB_MAX_HEIGHT, info->fb_height);
-	margin = (info->fb_height - vd->vd_height) >> 1;
-	vd->vd_transpose = margin * info->fb_stride;
-	vd->vd_width = MIN(VT_FB_MAX_WIDTH, info->fb_width);
-	margin = (info->fb_width - vd->vd_width) >> 1;
-	vd->vd_transpose += margin * (info->fb_bpp / NBBY);
+	if (TUNABLE_INT_FETCH("kern.vt.rotate", &rotate) != 0) {
+		switch (rotate) {
+		case 1:
+			if (info->fb_height > info->fb_width)
+			    info->fb_flags |= FB_FLAG_ROTATE_270;
+			break;
+		case 90:
+			info->fb_flags |= FB_FLAG_ROTATE_90;
+			break;
+		case 180:
+			info->fb_flags |= FB_FLAG_ROTATE_180;
+			break;
+		case 270:
+			info->fb_flags |= FB_FLAG_ROTATE_270;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (info->fb_flags & FB_FLAG_ROTATE_90 ||
+		info->fb_flags & FB_FLAG_ROTATE_270) {
+		vd->vd_height = MIN(VT_FB_MAX_HEIGHT, info->fb_width);
+		vd->vd_width = MIN(VT_FB_MAX_WIDTH, info->fb_height);
+		margin = (info->fb_height - vd->vd_width) >> 1;
+		vd->vd_transpose = margin * info->fb_stride;
+		margin = (info->fb_width - vd->vd_height) >> 1;
+		vd->vd_transpose += margin * (info->fb_bpp / NBBY);
+	} else {
+		vd->vd_height = MIN(VT_FB_MAX_HEIGHT, info->fb_height);
+		margin = (info->fb_height - vd->vd_height) >> 1;
+		vd->vd_transpose = margin * info->fb_stride;
+		vd->vd_width = MIN(VT_FB_MAX_WIDTH, info->fb_width);
+		margin = (info->fb_width - vd->vd_width) >> 1;
+		vd->vd_transpose += margin * (info->fb_bpp / NBBY);
+	}
 	vd->vd_video_dev = info->fb_video_dev;
 
 	if (info->fb_size == 0)
Index: sys/sys/fbio.h
===================================================================
--- sys/sys/fbio.h
+++ sys/sys/fbio.h
@@ -155,6 +155,9 @@
 #define	FB_FLAG_NOMMAP		1	/* mmap unsupported. */
 #define	FB_FLAG_NOWRITE		2	/* disable writes for the time being */
 #define	FB_FLAG_MEMATTR		4	/* override memattr for mmap */
+#define FB_FLAG_ROTATE_90	8	/* rotate vt */
+#define FB_FLAG_ROTATE_180	16
+#define FB_FLAG_ROTATE_270	32
 	vm_memattr_t	fb_memattr;
 	int		fb_stride;
 	int		fb_bpp;		/* bits per pixel */