ThinkPad T400

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ThinkPad T400
Manufacturer Lenovo
Name ThinkPad T400
Released 2009
Chipset Intel Cantiga GM45
CPU Intel Core 2 Duo (Penryn family). A Quad-core
mod exists, replacing the Core 2 Duo with a Core Quad
Graphics Intel GMA 4500MHD (and ATI Mobility Radeon HD
3650 on some models)
Display 1280x800/1440x900 TFT
Memory 2 or 4GB (Upgradable to 8GB)
Architecture x86_64
EC Proprietary
Original boot firmware LenovoBIOS
Intel ME/AMD PSP Present. Can be completly disabled.
Flash chip SOIC-8/SOIC-16/WSON-8 4MiB/8MiB (Upgradable
to 16MiB)
W+: Works without blobs; 
N: Doesn't work; 
W*: Works with blobs; 
U: Untested; 
P+: Partially works; 
P*: Partially works with blobs
Internal flashing with original boot firmware N
Display W+
Audio W+
RAM Init W+
External output W+
Display brightness P+
Payloads supported
GRUB Works
SeaBIOS Works
SeaBIOS with GRUB Works

Dell Latitude E6400

If you haven’t bought an T400 yet: the Dell Latitude E6400 is much easier to flash; no disassembly required, it can be flashed entirely in software from Dell BIOS to Libreboot. It is the same hardware generation (GM45), with same CPUs, video processor, etc.


It is believed that all or most laptops of the model T400 are compatible. See notes about CPU compatibility for potential incompatibilities.

There are two possible flash chip sizes for the T400: 4MiB (32Mbit) or 8MiB (64Mbit). This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB is SOIC-16.

The T400 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. libreboot disables and removes it by using a modified descriptor: see ../install/ich9utils.html (contains notes, plus instructions)

Flashing instructions can be found at ../install/#flashprog

NOTE: Libreboot standardises on flashprog now, as of 27 January 2024, which is a fork of flashrom.

EC update

It is recommended that you update to the latest EC firmware version. The EC firmware is separate from libreboot, so we don’t actually provide that, but if you still have Lenovo BIOS then you can just run the Lenovo BIOS update utility, which will update both the BIOS and EC version. See:

NOTE: this can only be done when you are using Lenovo BIOS. How to update the EC firmware while running libreboot is unknown. libreboot only replaces the BIOS firmware, not EC.

Updated EC firmware has several advantages e.g. bettery battery handling.

The T400 is almost identical to the X200, code-wise. See x200.html.

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