30 KiB
E.g. ThinkPad X220, X230, T440p, W541. - also desktop boards such as HP Elite 8200 SFF.
The lbmk build system automatically fetches required blobs for these
boards, when building, and sets them up properly, e.g. me_cleaner
is used. The same process is also available in a script, which can
insert them into ROM images.
If you're using release ROMs, these blobs are missing, and must be added. See: ivy_has_common.md.
About ROM image file names
Init types and display mode
NOTE: regardless of init type, on desktops, an external/add-on GPU can always be used. On laptop hardware in libreboot, libgfxinit will always be used. On desktop/server hardware, if available, libgfxinit will also always be used by default (but in that setup, SeaBIOS can be used if you want to use an add-on graphics card, e.g. on KCMA-D8, KGPE-D16, GA-G41M-ES2L)
This means that on desktop hardware such as KCMA-D8, KGPE-D16, G43T-AM3, GA-G41M-ES2L and others, you can use either the internal GPU or an add-on PCI-E graphics card. Simply use a ROM image that starts with SeaBIOS, and you can use both. On desktop/server hardware, libgfxinit simply means that you CAN use the internal graphics chip, but you don't have to; external add-on GPUs will also still work! However, if libgfxinit is enabled, that disables coreboot from loading/executing PCI option ROMs which means you MUST use SeaBIOS if you wish to use the add-on cards!
libgfxinit
In this setup, on supported systems, coreboot's own native video initialization
code is used. This is referred to generically as libgfxinit, which is coreboot's
library in 3rdparty/libgfxinit but not all boards with native video
initialization use libgfxinit; some of them are using coreboot's older style
of video initialization method, written purely in C.
corebootfb (libgfxinit)
high resolution coreboot framebuffer used on startup
txtmode (libgfxinit)
int10h text mode is used on startup.
vgarom
NOTE: no configs in libreboot are currently available that use this method.
With this method, coreboot is finding, loading and executing a VGA option ROM for your graphics hardware. This would not be done on laptops, because that implies supplying non-free binary blobs in libreboot, so this setup would only ever be provided on desktop hardware where no GPU exists or where it is desirable for you to use an external/add-on graphics card
vesafb (vgarom)
high resolution VESA framebuffer used on startup. This is equivalent
to corebootfb (high resolution framebuffer), but for setups where a VGA
Option ROM is used.
txtmode (vgarom)
int10h text mode is used on startup
normal
NOTE: Dell Latitude E6400 Nvidia variant uses this.
int10h text mode startup is implied here. The vesafb mode is unavailable here.
For vesafb mode, please use init type vgarom; most useful for GRUB payloads
or perhaps Tianocore.
In this setup, coreboot is neither implementing libgfxinit / native graphics initialization nor is it finding/loading/executing VGA option ROMs. In this setup, SeaBIOS would most likely be used for that.
The normal setup is supported in the libreboot build system, but not
currently used. It is there for desktop hardware that will be added in the
future, where those desktop boards do not have an onboard GPU and therefore an
add-on GPU is always used..
Payload names
grub
ROM images with just grub in the file name will start first with the GRUB
payload. They may or may not also provide other payloads in the menu, such as
memtest86+, SeaBIOS, Tianacore and so on.
seabios
ROM images with just seabios in the file name will start first with the
SeaBIOS payload. They will only contain SeaBIOS, but may also contain memtest as
an option in the boot menu.
seabios_withgrub
ROM images that have seabios_withgrub in the file name start with SeaBIOS
first, but also have GRUB available in the boot menu when you press ESC.
seabios_grubfirst (DEFUNCT)
DEFUNCT
This build option is obsolete, and should not be used. It was deleted
in lbmk revision e1bbdadc9584291cf062660d67128e9f17ab788e.
It was believed, in earlier theory, that VGA ROM initialisation could be used in SeaBIOS and then SeaBIOS boots into a GRUB payload (built for coreboot), where the initialisation would continue to be used, but it didn't work that way.
It's best to use PC GRUB (normal BIOS GRUB), but compile it into a floppy
image to insert inside CBFS, to then be executed by SeaBIOS. This is referred
to as SeaGRUB by the Libreboot project, and it would be quite useful
for desktop users, but it's largely irrelevant on laptops where
coreboot's own libgfxinit is usually available (or the option ROM is
easy to extract from vendor firmware and insert).
Where direct bare metal GRUB is desired, but you use a desktop system with an add-on graphics card, you must extract the VGA ROM for your card and insert it into the coreboot ROM, for coreboot itself to execute. This will require custom configuration on your part, and it is thus beyond the scope of the Libreboot project, in context of lbmk (automated build system).
Some older Libreboot releases included ROM images built using this option,
and those specific ROM images (seabios_grubfirst ones) should not be
used; you should only use seabios_grubfirst or seabios, in most
scenarios, if SeaBIOS is required.
For most desktop users, if running an external graphics card, it's easier to simply boot in text mode with a SeaBIOS payload and use only that. This will Just Work with almost all graphics cards, allowing you to use an operating system with a full display and (drivers permitting) full 2D/3D acceleration.
Which systems are supported?
Refer to the hardware compatibility page
Sandy/Ivybridge/Haswell MAC address (e.g. X230, X220, T440p, W541, hp8200sff) Intel GbE MAC address (IFD-based systems)
You can change the MAC address in flash, on these machines. See: nvmutil documentation
The MAC address is stored in a region of the boot flashed called GbE NVM which is short for gigabit ethernet non-volatile memory. Refer to the following article:
For GM45/ICH9M systems (e.g. ThinkPad X200/T400, Dell Latitude E6400), see: ich9utils documentation (you can also use nvmutil, see link above)
libreboot puts a default MAC address in the available ROM images, but this is a generic MAC address and it's identical on every ROM image. Technically, you can use it but if you encounter other libreboot users on the same ethernet switch, using the same physical network as you, you will encounter a MAC address conflict.
NOTE: R500 thinkpads do not have an Intel gigabit ethernet NIC, so on that laptop you can just flash the default ROM and you do not have to worry.
There are also some Intel X4X platforms that use an ICH10 southbridge, supported in libreboot, but these are flashed in a descriptorless setup, which means that the MAC address is irrelevant (either there will be an Intel PHY module that is now unusable, and you use an add-on card, or it doesn't use an Intel PHY module and the onboard NIC is usable).
Install via host CPU (internal flashing)
On all mainboards is a built-in programmer, which can read, erase and rewrite the boot flash. However, it is not always usable by default. For example, it may be configured to restrict write privileges by the host CPU.
In some situations, the host CPU can rewrite/erase/dump the boot flash.
This is called internal flashing. This means that you will run software,
namely flashrom, to read/erase/write the contents of the boot flash from a
running operating system on the target device.
NOTE: please also read the sections further down this page. On some systems, external flashing is required. This means that you power the system down and use a special tool that connects to and reprograms the boot flash.
NOTE: in some cases, external flashing is possible but special steps are required. This depends on your mainboard. Again, please read this page carefully.
Run flashrom on host CPU
You can simply take any ROM image from the libreboot project, and flash it. Boot a Linux distribution on the target device, and install flashrom.
In some cases, this is not possible or there are other considerations. Please read this section carefully.
Flash chip size
Use this to find out:
flashrom -p internal
In the output will be information pertaining to your boot flash.
Howto: read/write/erase the boot flash
How to read the current chip contents:
sudo flashrom -p internal:laptop=force_I_want_a_brick,boardmismatch=force -r dump.bin
You should still make several dumps, even if you're flashing internally, to
ensure that you get the same checksums. Check each dump using sha1sum
How to erase and rewrite the chip contents:
sudo flashrom -p internal:laptop=force_I_want_a_brick,boardmismatch=force -w libreboot.rom
If you are re-flashing a GM45+ICH9M laptop (e.g. ThinkPad X200/X200S/X200T, T400, T500, R400, W500 etc - but not R500), you should run the ich9gen utility to preserve your mac address. Please read the ich9utils documentation: /docs/install/ich9utils.html
NOTE: force_I_want_a_brick is not scary. Do not be scared! This merely disables
the safety checks in flashrom. Flashrom and coreboot change a lot, over the years,
and sometimes it's necessary to use this option. If you're scared, then just
follow the above instructions, but remove that option. So, just use -p internal.
If that doesn't work, next try -p internal:boardmismatch=force. If that doesn't
work, try -p internal:boardmismatch=force,laptop=force_I_want_a_brick. So long
as you ensure you're using the correct ROM for your machine, it will be safe
to run flashrom. These extra options just disable the safetyl checks in flashrom.
There is nothing to worry about.
If successful, it will either say VERIFIED or it will say that the chip
contents are identical to the requested image.
NOTE: there are exceptions where the above is not possible. Read about them in the sections below:
Exceptions
If your boot flash is currently write-protected
DELL Latitude E6400 laptop (easy to flash, similar to X200/T400)
See: Dell Latitude E6400 Libreboot Installation Guide
ThinkPad X200/T400/T500/W500/R400/R500 vendor BIOS
If you're running one of these, it cannot be flashed internally if you're still running the non-free Lenovo BIOS firmware.
See notes further down on this page. We have guides for specific thinkpads, related to disassembly and reassembly so that you can access the flash.
Please also see notes about the built-in MAC address inside the boot flash, for the onboard NIC (ethernet one); not relevant on R500, which doesn't use an Intel NIC.
Intel D510MO and D410PT running non-free Intel BIOS
D410PT is more or less the same board as D510MO, but we would like more info
about this board. If you have a D410PT mainboard, please contact the libreboot
project via IRC and ping leah before you flash it. When you do so, please
reference this paragraph on this web page.
Gigabyte GA-G41M-ES2l (any firmware)
Ignore this section. Internal flashing is possible, but there are two chips
and you must flash both chips. Refer to the guide:
Gigabyte GA-G41M-ES2L installation guide
Macbook1,1 running non-free Apple EFI firmware
This laptop requires external flashing. Remove the mainboard and refer to the external flashing guide; if libreboot is already running, you can flash internally.
MacBook2,1 can be flashed internally.
ASUS KFSN4-DRE?
Simply boot Linux with the default vendor firmware, and flash it internally, but before you do: take a push pin, remove the metal pin, and superglue the plastic part to the chip. Then remove the chip after you booting your Linux system. Install a new chip, and flash that.
This board uses LPC flash in a PLCC32 socket. This coreboot page shows an example of the push pin as a proof of concept: http://www.coreboot.org/Developer_Manual/Tools#Chip_removal_tools
ASUS KGPE-D16 running non-free ASUS BIOS
ASUS KCMA-D8 running non-free ASUS BIOS
ASUS D945GCLF running non-free Intel BIOS
ThinkPad X60/X60S/X60T/T60 with Lenovo BIOS
NOTE: If BIOS password auth is enabled, you can clear it by shorting pins on an EEPROM and then resetting the password in Lenovo BIOS, prior to flashing Libreboot. For T60, see: https://ounapuu.ee/posts/2022/10/13/recovering-password-locked-thinkpad-t60/ (TODO: link something here for X60)
X60 BIOS password (Lenovo): you might find info here: https://bios-pw.org/
You can just get bucts from the libreboot project, same thing for the patched flashrom. In the Libreboot 20160907 release, there is a utility archive, which has statically compiled executables. They still work just fine on modern systems, and they can be used for this purpose.
Here are a list of targets:
- ThinkPad X60/X60S/X60T: flash the X60 ROM
- ThinkPad T60 with Intel GPU: flash the T60 ROM
- ThinkPad T60 with ATI GPU: flash the Headless T60 ROM (no video init, but you can get a serial console on the RS232 port if you use the Advanced Dock or Advanced Mini Dock. Connect to it from another machine, using null modem cable and USB serial adapter; Screen can connect to the serial console and you will run it at 115200 baud rate. agetty/fgetty in Linux can give you a serial console in your OS)
Download and build flashrom, using the instructions
on the Git page, and download the bucts software using the
notes on that very same page.
You can replace Lenovo BIOS with libreboot, using flashrom running on the host CPU. However, there are some considerations.
Firstly, make sure that the yellow CMOS battery is installed, and functioning correctly. You could check the voltage. The battery is a CR2032 coin cell and it should be providing a 3V signal. You should check this while it is connected to the board, because this will give a more accurate reading (if the battery is weak, it will have severe voltage drop when there is any load on it, which there will be. This coincell powers the real-time clock and CMOS memory).
Lenovo BIOS restricts write access, but there is a weakness in it. With a specially patched flashrom binary, you can easily flash it but the top 64KiB region of the boot flash, containing your bootblock, cannot be flashed just yet. However, there is a register called the Backup Control or BUC register and in that register is a status bit called Top Swap or TS.
There are 2 bootblocks possible. The other bootblock is below the upper
64KiB one, which can't be flashed, but the lower one can. By using bucts, you
can set the machine to boot using that lower 64KiB bootblock, which is
read-write. You do this by setting the BUC.TS register to 1, using the bucts
program referenced below.
The libreboot ROM images already have the upper 64KiB bootblock copied to the lower one, so you don't have to worry about copying it yourself.
If you build flashrom using the libreboot build system, there will be three binaries:
flashromflashrom_i945_sstflashrom_i945_mx
It's these last two binaries that you should use. Now compile bucts (just
run make in the bucts source directory).
Run the bucts tool:
sudo ./bucts 1
Ensure that your CMOS battery is connected too. Now you must determine whether
you have Macronix or SST. An X60/T60 thinkpad will have either an SST or a
Macronix chip. The Macronix chip will have "MX" written on the chip. You will
use flashrom_i945_sst for the SST chip, and flashrom_i945_mx for the
Macronix chip.
Now run flashrom (for SST):
sudo ./flashrom_i945_sst -p internal -w coreboot.rom
Or Macronix:
sudo ./flashrom_i945_mx -p internal -w coreboot.rom
NOTE: you can just run both. One of them will succeed. It is perfectly harmless to run both versions of flashrom. In fact, you should do so!
You'll see a lot of errors. This is normal. You should see something like:
Reading old flash chip contents... done.
Erasing and writing flash chip... spi_block_erase_20 failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
spi_block_erase_52 failed during command execution at address 0x0
Reading current flash chip contents... done. Looking for another erase function.
Transaction error!
spi_block_erase_d8 failed during command execution at address 0x1f0000
Reading current flash chip contents... done. Looking for another erase function.
spi_chip_erase_60 failed during command execution
Reading current flash chip contents... done. Looking for another erase function.
spi_chip_erase_c7 failed during command execution
Looking for another erase function.
No usable erase functions left.
FAILED!
Uh oh. Erase/write failed. Checking if anything has changed.
Reading current flash chip contents... done.
Apparently at least some data has changed.
Your flash chip is in an unknown state.
If you see this, rejoice! It means that the flash was successful. Please do not panic. Shut down now, and wait a few seconds, then turn back on again.
WARNING: if flashrom complains about /dev/mem access, please
run sudo ./bucts 0. If flashrom is complaining about /dev/mem, it means
that you have CONFIG_STRICT_DEVMEM enabled in your kernel. Reboot with the
following kernel parameter added in your bootloader: iomem=relaxed and try
again with the above instructions. DO NOT continue until the above works, and
you see the expected flashrom output as indicated above.
If you did run flashrom and it failed to flash, but you set bucts to 1 and shut down, don't worry. Just remove the yellow coin-cell battery (it's underneath the keyboard, connected to the mainboard), wait a minute or two, reconnect the coin-cell and try again from scratch. In this instance, if flashrom didn't do anything, and didn't flash anything, it means you still have Lenovo BIOS but if bucts is set to 1, you can flush it and set it back to 0. BUC.TS is stored in volatile memory, powered by that CR2032 coin-cell battery.
Assuming that everything went well:
Flash the ROM for a second time. For this second flashing attempt, the upper 64KiB bootblock is now read-write. Use the unpatched flashrom binary:
sudo ./flashrom -p internal -w libreboot.rom
To reset bucts, do this:
sudo ./bucts 0
ONLY set bucts back to 0 if you're sure that the upper 64KiB bootblock is flashed. It is flashed if flashrom said VERIFIED when running the above command.
If it said VERIFIED, shut down. If it didn't say VERIFIED, make sure bucts is still set to 1, and consult the libreboot project on IRC for advice, and avoid shutting down your system until you get help.
If all went well, libreboot should now be booting and you should be able to boot into your operating system.
If you messed up, there are external flashing instructions. See main navigation menu on this page. These "external" instructions teach you how to flash externally, using special equipment (requires disassembling your laptop and removing the mainboard).
Install using external flashing equipment
In many situations, the host CPU is restricted from rewriting/erasing/dumping the boot flash. In this situations, you must re-flash the chip (containing the boot firmware) externally. This is called external flashing.
DO NOT buy CH341A! Read the above link, which explains why you shouldn't use it. CH341A will damage your flash chip, and other components on your mainboard.
How to use external flashing equipment
Refer to the following article:
Externally rewrite 25xx NOR flash via SPI protocol
DELL Latitude E6400 laptop (easy to flash, similar to X200/T400)
See: Dell Latitude E6400 Libreboot Installation Instructions
ASUS KFSN4-DRE
The KFSN4-DRE has an LPC chip. Most people have been flashing these internally, hot-swapping the chip out after boot, preserving the original chip, and using flashrom on a new chip as described above.
TODO: Document PLCC32 (LPC) flashing. The FlexyICE has been used to flash these chips, but it is hard to find now. A custom flasher may be made such as flashrom serprog stm32 or teensy flasher
TARGET: Apple Macbook2,1, Macbook1,1 and iMac5,2 (i945 platform)
iMac5,2 is essentially the same board as Macbook2,1, and it is compatible with libreboot.
Refer to the following article:
Macbook2,1 and MacBook1,1 installation guide
iMac5,2 isn't documented but you can find the flash chip on that board quite
easily. See the generic flashing guide:
Externally rewrite 25xx NOR flash via SPI protocol
TARGET: HP EliteBook laptops
Refer to the hardware page for info about HP laptops.
Links to specific HP laptop pages:
TARGET: HP Elite 8200 SFF
See: HP Elite 8200 SFF hardware information
TARGET: Gigabyte GA-G41M-ES2L mainboard
Refer to the following article:
Gigabyte GA-G41M-ES2L
TARGET: Intel D510MO and D410PT mainboards
Refer to the following article:
Intel D510MO and D410PT boards
TARGET: Intel D945GCLF mainboard
Refer to the following article:
Intel D945GCLF
TARGET: ASUS KGPE-D16 mainboard
Refer to the following article:
ASUS KGPE-D16
TARGET: ASUS KCMA-D8 mainboard
Refer to the following article:
ASUS KCMA-D8
TARGET: ASUS Chromebook C201 laptop
Refer to the following article:
ASUS Chromebook C201
TARGET: Lenovo ThinkPad X60 laptop
Refer to the following article:
ThinkPad X60
TARGET: Lenovo ThinkPad X60 Tablet laptop
Refer to the following article:
ThinkPad X60 Tablet
TARGET: Lenovo ThinkPad T60 laptop
Refer to the following article:
ThinkPad T60
TARGET: Lenovo ThinkPad X200 laptop
Refer to the following article:
ThinkPad X200
TARGET: Lenovo ThinkPad X200S or X200 Tablet laptop
Software-wise, identical to regular X200 but SMD rework skills are required. You must de-solder the default flash chip, and replace it with another one.
Refer to the following article:
25xx NOR flashing guide
That guide, linked above, has instructions for how to deal with these machines.
TARGET: Lenovo ThinkPad T400 laptop
Refer to the following article:
ThinkPad T400
TARGET: Lenovo ThinkPad T400S laptop
Software-wise, identical to regular T400 but SMD rework skills are required. You must de-solder the default flash chip, and replace it with another one.
Refer to the following article:
25xx NOR flashing guide
TARGET: Lenovo ThinkPad R400 laptop
Refer to the following article:
ThinkPad R400
TARGET: Lenovo ThinkPad T500 or W500 laptop
These two laptops have identical mainboard, except for a few minor changes.
Refer to the following article:
ThinkPad T500/W500
TARGET: Lenovo ThinkPad R500 laptop
Refer to the following laptop:
ThinkPad R500
sandybridge/ivybridge/haswell
If using release ROMs, neutered ME must be inserted. Refer to the info below.
On currently supported HP laptops AND desktops
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS
Refer to links about and the hardware page for installation instructions on each HP mainboard.
TARGET: ThinkPad X220/T420/T420s
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS
Similar to X230 but there's only 1 flash. Intel ME image must be inserted if using release ROMs. See: guide (says ivy/haswell but the insert script for ME works with sandybridge aswell).
Refer to assembly/disassembly guide for T420:
ThinkPad T420 external flashing (T420s is very similar)
X220/X220i: disassembly/reassembly very similar to X230. Please refer to X230 instructions, but note: X220/X220i has one flash chip, not two.
If using release ROMs, neutered ME must be inserted. Refer to the above guide.
TARGET: Thinkpad X230/T430/T530/W530
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS
NOTE: no install docs for T430/T530/W530 yet, but check coreboot wiki.
NOTE: Internal flashing is also possible, on this machine, from vendor firmware, but it's still recommended to use a clip and a SPI flasher. However, follow internal X230 flashing from Lenovo firmware if you wish.
Refer to the ivybridge/haswell common guide. for how to make the rom image usable for external flashing (with a clip). If using release ROMs, you must insert the neutered ME. Look at the info on that page.
Read board documentation for disassembly.
TARGET: Thinkpad X230t
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS
Refer to the ivybridge/haswell common guide. for how to make the rom image usable for external flashing.
Read board documentation for disassembly. (same instructions as X230, for this purpose of external flashing, but full disassembly will differ slightly)
If using release ROMs, neutered ME must be inserted. Refer to the above guide.
TARGET: Thinkpad t440p/w541
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING, OR YOU MIGHT BRICK YOUR MACHINE: SAFETY PRECAUTIONS
Refer to the ivybridge/haswell common guide. for how to make the rom image usable for external flashing.
Read board documentation for disassembly.
If using release ROMs, neutered ME must be inserted. Refer to the above guide.