Change H2C boot params to match legacy.

build_kernel_image.sh

 #!/bin/bash
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Helper script that generates the signed kernel image
 
 . "$(dirname "$0")/common.sh"
 
@@ skipping 113 matching lines @@
 # support this before shipping, but at the moment they don't.
 if [[ "${FLAGS_arch}" = "x86" ]]; then
 
   # Legacy BIOS will use the kernel in the rootfs (via syslinux), as will
   # standard EFI BIOS (via grub, from the EFI System Partition). Chrome OS
   # BIOS will use a separate signed kernel partition, which we'll create now.
   # FIXME: remove serial output, debugging messages.
   mkdir -p ${FLAGS_working_dir}
   cat <<EOF | cat - "${FLAGS_working_dir}/boot.config" \
     > "${FLAGS_working_dir}/config.txt"
-earlyprintk=serial,ttyS0,115200
-console=ttyS0,115200
+quiet
+console=tty2
 init=/sbin/init
 add_efi_memmap
 boot=local
 rootwait
 ro
 noresume
 noswap
 i915.modeset=1
-loglevel=7
+loglevel=1
 cros_secure
 kern_guid=%U
 tpm_tis.force=1
 tpm_tis.interrupts=0
 EOF
   WORK="${WORK} ${FLAGS_working_dir}/config.txt"
 
   # We sign the image with the recovery_key, because this is what goes onto the
   # USB key. We can only boot from the USB drive in recovery mode.
   # For dev install shim, we need to use the installer keyblock instead of
@@ skipping 96 matching lines @@
   info "Cleaning up temporary files: ${WORK}"
   rm ${WORK}
   rmdir ${FLAGS_working_dir}
 fi
 
 info "Kernel partition image emitted: ${FLAGS_to}"
 
 if [[ -f ${FLAGS_rootfs_hash} ]]; then
   info "Root filesystem hash emitted: ${FLAGS_rootfs_hash}"
 fi