2021-05-18 12:21:48 +00:00
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title: ThinkPad T400
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x-toc-enable: true
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2022-11-19 16:09:02 +00:00
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<div class="specs">
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<center>
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2023-04-24 02:23:17 +00:00
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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>
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</center>
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| ***Specifications*** | |
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|----------------------------|------------------------------------------------|
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| **Manufacturer** | Lenovo |
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| **Name** | ThinkPad T400 |
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| **Released** | 2009 |
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| **Chipset** | Intel Cantiga GM45 |
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| **CPU** | Intel Core 2 Duo (Penryn family). A Quad-core
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mod exists, replacing the Core 2 Duo with a Core Quad |
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| **Graphics** | Intel GMA 4500MHD (and ATI Mobility Radeon HD
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3650 on some models) |
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| **Display** | 1280x800/1440x900 TFT |
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| **Memory** | 2 or 4GB (Upgradable to 8GB) |
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| **Architecture** | x86_64 |
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| **EC** | Proprietary |
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| **Original boot firmware** | LenovoBIOS |
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| **Intel ME/AMD PSP** | Present. Can be completly disabled. |
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| **Flash chip** | SOIC-8/SOIC-16/WSON-8 4MiB/8MiB (Upgradable
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to 16MiB) |
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```
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W+: Works without blobs;
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N: Doesn't work;
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W*: Works with blobs;
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U: Untested;
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P+: Partially works;
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P*: Partially works with blobs
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```
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| ***Features*** | |
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|----------------|---------------------------------------|
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| **Internal flashing with original boot firmware** | N |
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| **Display** | W+ |
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| **Audio** | W+ |
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| **RAM Init** | W+ |
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| **External output** | W+ |
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| **Display brightness** | P+ |
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| ***Payloads supported*** | |
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|---------------------------|-----------|
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| **GRUB** | Works |
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| **SeaBIOS** | Works |
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| **SeaBIOS with GRUB** | Works |
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</div>
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2023-04-21 01:36:32 +00:00
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Dell Latitude E6400
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===================
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2023-04-21 01:32:51 +00:00
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**If you haven't bought an T400 yet: the [Dell Latitude
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E6400](../../news/e6400.md) is much easier to flash; no disassembly required,
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it can be flashed entirely in software from Dell BIOS to Libreboot. It is the
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same hardware generation (GM45), with same CPUs, video processor, etc.**
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2021-05-18 12:21:48 +00:00
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Introduction
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============
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It is believed that all or most laptops of the model T400 are compatible. See notes
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about [CPU
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compatibility](../install/t400_external.html#cpu_compatibility) for
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potential incompatibilities.
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There are two possible flash chip sizes for the T400: 4MiB (32Mbit) or
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8MiB (64Mbit). This can be identified by the type of flash chip below
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the palmrest: 4MiB is SOIC-8, 8MiB is SOIC-16.
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*The T400 laptops come with the ME (and sometimes AMT in addition)
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before flashing libreboot. libreboot disables and removes it by using a
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modified descriptor: see [../install/ich9utils.md](../install/ich9utils.md)*
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(contains notes, plus instructions)
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Flashing instructions can be found at
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[../install/\#flashrom](../install/#flashrom)
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EC update {#ecupdate}
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=========
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It is recommended that you update to the latest EC firmware version. The
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[EC firmware](../../faq.md#ec-embedded-controller-firmware) is separate from
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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
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will update both the BIOS and EC version. See:
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- [../install/#flashrom](../install/#flashrom)
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- <http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk>
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NOTE: this can only be done when you are using Lenovo BIOS. How to
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update the EC firmware while running libreboot is unknown. libreboot
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only replaces the BIOS firmware, not EC.
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Updated EC firmware has several advantages e.g. bettery battery
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handling.
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The T400 is almost identical to the X200, code-wise. See
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[x200.md](x200.md).
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