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---
title: ThinkPad T400
x-toc-enable: true
...
<div class="specs">
<center>
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<img tabindex=1 alt="ThinkPad T400" class="p" src="https://av.libreboot.org/t400/boot1.jpg" /><span class="f"><img src="https://av.libreboot.org/t400/boot1.jpg" /></span>
</center>
| ***Specifications*** | |
|----------------------------|------------------------------------------------|
| **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
```
| ***Features*** | |
|----------------|---------------------------------------|
| **Internal flashing with original boot firmware** | N |
| **Display** | W+ |
| **Audio** | W+ |
| **RAM Init** | W+ |
| **External output** | W+ |
| **Display brightness** | P+ |
| ***Payloads supported*** | |
|---------------------------|-----------|
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| **GRUB** | Works |
| **SeaBIOS** | Works |
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| **SeaBIOS with GRUB** | Works |
</div>
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Dell Latitude E6400
===================
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**If you haven't bought an T400 yet: the [Dell Latitude
E6400](../../news/e6400.md) 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.**
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Introduction
============
It is believed that all or most laptops of the model T400 are compatible. See notes
about [CPU
compatibility](../install/t400_external.html#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
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modified descriptor: see [../install/ich9utils.md](../install/ich9utils.md)*
(contains notes, plus instructions)
Flashing instructions can be found at
[../install/\#flashrom](../install/#flashrom)
EC update {#ecupdate}
=========
It is recommended that you update to the latest EC firmware version. The
[EC firmware](../../faq.md#ec-embedded-controller-firmware) is separate from
libreboot, so we don't actually provide that, but if you still have
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Lenovo BIOS then you can just run the Lenovo BIOS update utility, which
will update both the BIOS and EC version. See:
- [../install/#flashrom](../install/#flashrom)
- <http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk>
NOTE: this can only be done when you are using Lenovo BIOS. How to
update the EC firmware while running libreboot is unknown. libreboot
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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.md](x200.md).