This section relates to installing libreboot on supported targets.
Libreboot supports the following (refer to the release page):
The ROM images in each archive use the following naming convention: boardname_keymap_mode.rom
Available modes: vesafb or txtmode. The vesafb ROM images are recommended, in most cases; txtmode ROM images come with MemTest86+, which requires text-mode instead of the usual framebuffer used by coreboot native graphics initialization.
Keymaps are named appropriate/y according to each keyboard layout support in GRUB. To learn how these keymaps are created, see ../grub/index.html#grub_keyboard
Libreboot comes with ROM images built for QEMU, by default:
Examples of how to use libreboot in QEMU:
You can optionally specify the -serial stdio argument, so that QEMU will emulate a serial terminal on the standard input/output (most likely your terminal emulator or TTY).
Other arguments are available for QEMU. The manual will contain more information.
On GM45 hardware (with libreboot), make sure that the kvm and kvm_intel kernel modules are not loaded, when using QEMU.
On all current targets, updating libreboot can be accomplished without disassembly and, therefore, without having to externally re-flash using any dedicated hardware. In other words, you can do everything entirely in software, directly from the OS that is running on your libreboot system.
If you are using libreboot_src or git, then make sure that you built the sources first (see ../git/index.html#build).
Look at the list of ROM images to see which image is compatible with your device.
If you are currently running the proprietary firmware (not libreboot or coreboot), then the flashing instructions for your system are going to be different.
X60/T60 users running the proprietary firmware should refer to #flashrom_lenovobios. MacBook2,1 users running Apple EFI should refer to #flashrom_macbook21
X200 users, refer to x200_external.html, R400 users refer to r400_external.html, T400 users refer to t400_external.html, T500 users refer to t500_external.html
Internal flashing should work just fine, even if you are currently booting the proprietary firmware.
Libreboot currently lacks documentation for externally re-flashing an LPC flash chip. However, these boards have the flash chip inside of an LPCC socket, and it is possible to hot-swap the chips. If you want to back up your known-working image, simply hot-swap the chip for one that is the same capacity, after having dumped a copy of the current firmware (flashrom -p internal -r yourchosenname.rom), and then flash that chip with the known-working image. Check whether the system still boots, and if it does, then it should be safe to flash the new image (because you now have a backup of the old image).
Keeping at least one spare LPC PLCC chip with working firmware on it is highly recommended, in case of bricks.
DO NOT hot-swap the chip with your bare hands. Use a PLCC chip extractor. These can be found online.
Do check the HCL entry: ../hcl/kfsn4-dre.html
X60/T60 users should be fine with this guide. If you write-protected the flash chip, please refer to x60_unbrick.html, x60tablet_unbrick.html or t60_unbrick.html. This probably does not apply to you. Most people do not write-protect the flash chip, so you probably didn't either.
Similarly, it is possible to write-protect the flash chip in coreboot or libreboot on GM45 laptops (X200/R400/T400/T500). If you did this, then you will need to use the links above for flashing, treating your laptop as though it currently has the proprietary firmware (because write-protected SPI flash requires external re-flashing, as is also the case when running the proprietary firmware).
If you did not write-protect the flash chip, or it came to you without any write-protection (libreboot does not write-protect the flash chip by default, so this probably applies to you), read on!
Users of the X200/R400/T400/T500 take note: The MAC address for the onboard ethernet chipset is located inside the flash chip. Libreboot ROM images for these laptops contain a generic MAC address by default (00:F5:F0:40:71:FE), but this is not what you want. Make sure to change the MAC address inside the ROM image, before flashing it. The instructions on ../hcl/gm45_remove_me.html#ich9gen show how to do this.
It is important that you change the default MAC address, before flashing. It will be printed on a sticker at the bottom of the laptop, or it will be printed on a sticker next to or underneath the RAM. Alternatively, and assuming that your current firmware has the correct MAC address in it, you can get it from your OS.
Users of the X200/R400/T400/T500 take note: There are two different sized capacities that your flash chip could have: 4MiB or 8MiB. There are archives for each capacity, for each of these laptops, and you will need to select the correct size.
To easily identify which size chip is present:
# dmidecode | grep ROM\ Size
or (on some distributions):
$ sudo dmidecode | grep ROM\ Size
Example output:
# ROM Size: 8192 kB
Excellent! Moving on...
Download the libreboot_util.tar.xz archive, and extract it. Inside, you will find a directory called flashrom. This contains statically compiled executable files of the flashrom utility, which you will use to re-flash your libreboot system.
Simply use cd on your terminal, to switch to the libreboot_util directory. Inside, there is a script called flash, which will detect what CPU architecture you have (e.g. i686, x86_64) and use the appropriate executable. It is also possible for you to build these executables from the libreboot source code archives.
How to update the flash chip contents:
$ sudo ./flash update yourrom.rom
Ocassionally, coreboot changes the name of a given board. If flashrom complains about a board mismatch, but
you are sure that you chose the correct ROM image, then run this alternative command:
$ sudo ./flash forceupdate yourrom.rom
You should see "Verifying flash... VERIFIED." written at the end of the flashrom output. Shut down after you see this, and then boot up again after a few seconds.
This is for the ThinkPad X60 and T60 while running Lenovo BIOS. If you already have coreboot or libreboot running, then go to #flashrom instead!
If you are flashing a Lenovo ThinkPad T60, be sure to read ../hcl/index.html#supported_t60_list
If you are using libreboot_src or git, then make sure that you built the sources first (see ../git/index.html#build).
Warning: this guide will not instruct the user how to backup the original Lenovo BIOS firmware. These backups are tied to each machine, and will not work on any other. For that, please refer to http://www.coreboot.org/Board:lenovo/x60/Installation.
If you're using libreboot 20150518, note that there is a mistake in the flashing script. Apply this patch to the BASH script named flash (this is the script for flashing libreboot into your X60): x60flashscript.patch. This patch is merged in the main git repository, and in all releases after 20150518.
The first half of the procedure is as follows:
$ sudo ./flash i945lenovo_firstflash yourrom.rom.
You should see within the output the following:
"Updated BUC.TS=1 - 64kb address ranges at 0xFFFE0000 and 0xFFFF0000 are swapped".
You should also see within the output the following:
"Flash chip is in an unknown state", "FAILED" and "DO NOT SHUTDOWN OR REBOOT"
Seeing this means that the operation was a resounding success! DON'T PANIC.
See this link for more details: http://thread.gmane.org/gmane.linux.bios.flashrom/575.
If the above is what you see, then SHUT DOWN. Wait a few seconds, and then boot; libreboot is running, but there is a 2nd procedure *needed* (see below).
When you have booted up again, you must also do this:
$ sudo ./flash i945lenovo_secondflash yourrom.rom
You should see within the output the following:
"Updated BUC.TS=0 - 128kb address range 0xFFFE0000-0xFFFFFFFF is untranslated"
You should also see within the output the following:
"Verifying flash... VERIFIED."
If you have a MacBook1,1, refer to ../hcl/index.html#macbook11 for flashing instructions.
This is for the MacBook2,1 while running Apple EFI firmware. If you already have coreboot or libreboot running, then go to #flashrom instead!
Be sure to read the information in ../hcl/index.html#macbook21.
Warning: this guide will not instruct the user how to backup the original Apple EFI firmware. For that, please refer to http://www.coreboot.org/Board:apple/macbook21.
If you are using libreboot_src or git, then make sure that you built the sources first (see ../git/index.html#build).
Look at the list of ROM images to see which image is compatible with your device.
Use this flashing script, to install libreboot:
$ sudo ./flash i945apple_firstflash yourrom.rom
You should also see within the output the following:
"Verifying flash... VERIFIED."
Shut down.
Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
Copyright © 2015 Chris Ryder <cdkr00@gmail.com>
This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
A copy of the license can be found at ../cc-by-sa-4.txt.
This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ../cc-by-sa-4.txt for more information.