diff --git a/sys/i386/isa/vesa.c b/sys/i386/isa/vesa.c
index 22c50116012..97dca6256f8 100644
--- a/sys/i386/isa/vesa.c
+++ b/sys/i386/isa/vesa.c
@@ -775,21 +775,36 @@ vesa_set_mode(video_adapter_t *adp, int mode)
 		vesa_adp->va_buffer = BIOS_PADDRTOVADDR(info.vi_buffer);
 		vesa_adp->va_buffer_size = info.vi_buffer_size;
 	}
-	bcopy(&info, &adp->va_info, sizeof(adp->va_info));
 	len = vesa_bios_get_line_length();
-	if (len > 0)
-		adp->va_line_width = len;
-	else if (info.vi_flags & V_INFO_GRAPHICS)
-		adp->va_line_width = info.vi_width/8;
-	else
-		adp->va_line_width = info.vi_width;
+	if (len > 0) {
+		vesa_adp->va_line_width = len;
+	} else if (info.vi_flags & V_INFO_GRAPHICS) {
+		switch (info.vi_depth/info.vi_planes) {
+		case 1:
+			vesa_adp->va_line_width = info.vi_width/8;
+			break;
+		case 2:
+			vesa_adp->va_line_width = info.vi_width/4;
+			break;
+		case 4:
+			vesa_adp->va_line_width = info.vi_width/2;
+			break;
+		case 8:
+		default: /* shouldn't happen */
+			vesa_adp->va_line_width = info.vi_width;
+			break;
+		}
+	} else {
+		vesa_adp->va_line_width = info.vi_width;
+	}
 #if VESA_DEBUG > 0
 	printf("vesa_set_mode(): vi_width:%d, len:%d, line_width:%d\n",
-	       info.vi_width, len, adp->va_line_width);
+	       info.vi_width, len, vesa_adp->va_line_width);
 #endif
+	bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
 
 	/* move hardware cursor out of the way */
-	(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
+	(*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
 
 	return 0;
 }
diff --git a/sys/i386/isa/vga_isa.c b/sys/i386/isa/vga_isa.c
index 7db1ce329f5..4fca03f2231 100644
--- a/sys/i386/isa/vga_isa.c
+++ b/sys/i386/isa/vga_isa.c
@@ -853,10 +853,25 @@ update_adapter_info(video_adapter_t *adp, video_info_t *info)
     	adp->va_buffer = BIOS_PADDRTOVADDR(info->vi_buffer);
     	adp->va_buffer_size = info->vi_buffer_size;
     }
-    if (info->vi_flags & V_INFO_GRAPHICS)
-	adp->va_line_width = info->vi_width/8;
-    else
+    if (info->vi_flags & V_INFO_GRAPHICS) {
+	switch (info->vi_depth/info->vi_planes) {
+	case 1:
+	    adp->va_line_width = info->vi_width/8;
+	    break;
+	case 2:
+	    adp->va_line_width = info->vi_width/4;
+	    break;
+	case 4:
+	    adp->va_line_width = info->vi_width/2;
+	    break;
+	case 8:
+	default: /* shouldn't happen */
+	    adp->va_line_width = info->vi_width;
+	    break;
+	}
+    } else {
 	adp->va_line_width = info->vi_width;
+    }
     bcopy(info, &adp->va_info, sizeof(adp->va_info));
 }
 
diff --git a/sys/isa/vga_isa.c b/sys/isa/vga_isa.c
index 33866b8f699..49baedb3735 100644
--- a/sys/isa/vga_isa.c
+++ b/sys/isa/vga_isa.c
@@ -26,7 +26,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: vga_isa.c,v 1.1 1999/01/23 16:53:30 dfr Exp $
+ * $Id: vga_isa.c,v 1.2 1999/02/05 11:52:08 yokota Exp $
  */
 
 #include "vga.h"
@@ -851,10 +851,25 @@ update_adapter_info(video_adapter_t *adp, video_info_t *info)
     	adp->va_buffer = BIOS_PADDRTOVADDR(info->vi_buffer);
     	adp->va_buffer_size = info->vi_buffer_size;
     }
-    if (info->vi_flags & V_INFO_GRAPHICS)
-	adp->va_line_width = info->vi_width/8;
-    else
+    if (info->vi_flags & V_INFO_GRAPHICS) {
+	switch (info->vi_depth/info->vi_planes) {
+	case 1:
+	    adp->va_line_width = info->vi_width/8;
+	    break;
+	case 2:
+	    adp->va_line_width = info->vi_width/4;
+	    break;
+	case 4:
+	    adp->va_line_width = info->vi_width/2;
+	    break;
+	case 8:
+	default: /* shouldn't happen */
+	    adp->va_line_width = info->vi_width;
+	    break;
+	}
+    } else {
 	adp->va_line_width = info->vi_width;
+    }
     bcopy(info, &adp->va_info, sizeof(adp->va_info));
 }