diff -u syslinux-3.63+dfsg/debian/changelog syslinux-3.63+dfsg/debian/changelog
--- syslinux-3.63+dfsg/debian/changelog
+++ syslinux-3.63+dfsg/debian/changelog
@@ -1,3 +1,9 @@
+syslinux (2:3.63+dfsg-2ubuntu4) jaunty; urgency=low
+
+  * MBR: BIOS bug work-around: Ctrl key forces boot from first hard disk (LP: 277903)
+
+ -- TJ <ubuntu@tjworld.net>  Mon, 30 Mar 2009 16:30:00 +0000
+
 syslinux (2:3.63+dfsg-2ubuntu3) intrepid; urgency=low
 
   * Drop mtools back to Recommends now that recommended packages are
diff -u syslinux-3.63+dfsg/debian/patches/00list syslinux-3.63+dfsg/debian/patches/00list
--- syslinux-3.63+dfsg/debian/patches/00list
+++ syslinux-3.63+dfsg/debian/patches/00list
@@ -8,0 +9 @@
+15-mbr-ctrl-key-force-first-hard-disk.dpatch
only in patch2:
unchanged:
--- syslinux-3.63+dfsg.orig/debian/patches/15-mbr-ctrl-key-force-first-hard-disk.dpatch
+++ syslinux-3.63+dfsg/debian/patches/15-mbr-ctrl-key-force-first-hard-disk.dpatch
@@ -0,0 +1,35 @@
+#!/bin/sh /usr/share/dpatch/dpatch-run
+## 15-mbr-ctrl-key-force-first-hard-disk.dpatch
+##
+## DP: MBR use Ctrl key to force boot from first hard disk.
+
+@DPATCH@
+
+diff --git a/mbr/mbr.S b/mbr/mbr.S
+index 722d90d..e8be09e 100644
+--- a/mbr/mbr.S
++++ b/mbr/mbr.S
+@@ -51,6 +51,7 @@ _start:
+ 	movw	%ax, %ss
+ 	movw	$stack, %sp
+ 	movw	%sp, %si
++	movw	%sp, %bp		/* needed later if drive number is to be forced due to Ctrl key being pressed */
+ 	pushw	%es		/* es:di -> $PnP header */
+ 	pushw	%di
+ 	pushw	%dx		/* dl -> drive number */
+@@ -66,6 +67,15 @@ _start:
+ 	ljmpw	$0, $next
+ 
+ next:
++	/* Provide a way for the user to force boot from first hard-disk by pressing a Ctrl key */
++get_shift_keys:				/* Provide a way for the user to force CHS addressing mode by pressing either Shift key */
++	testb	$0x04, 0x0417	/* I/O memory-mapped keyboard shift flags: control key pressed? */
++	jz		detect_bios_type
++force_first_hard_disk:
++	movb 	$0x80, -6(%bp)	/* offset from top-of-stack to drive number; force it to be first hard disk */
++	movb	$0x80, %dl		/* change the drive number about to be used in detect_bios_type */
++
++detect_bios_type:
+ 	/* Check to see if we have EBIOS */
+ 	pushw	%dx		/* drive number */
+ 	movb	$0x41, %ah	/* %al == 0 already */