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-<!DOCTYPE html>
-<html>
-<head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1">
-
- <style type="text/css">
- @import url('../css/main.css');
- </style>
-
- <title>ThinkPad R400</title>
-</head>
-
-<body>
-
- <div class="section">
- <h1 id="pagetop">ThinkPad R400</h1>
-
- <p>
- It is believed that all or most R400 laptops are compatible.
- See notes about <a href="../install/r400_external.html#cpu_compatibility">CPU compatibility</a> for
- potential incompatibilities.
- </p>
-
- <p>
- There are two possible flash chip sizes for the R400: 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.
- </p>
-
- <p>
- <b>The R400 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it
- by using a modified descriptor: see <a href="gm45_remove_me.html">gm45_remove_me.html</a></b> (contains notes, plus
- instructions)
- </p>
-
- <p>
- Flashing instructions can be found at <a href="../install/#flashrom">../install/#flashrom</a>
- </p>
-
- <p>
- <a href="./">Back to previous index</a>.
- </p>
- </div>
-
- <div class="section">
-
- <h1 id="ecupdate">EC update</h1>
-
- <p>
- It is recommended that you update to the latest EC firmware version.
- The <a href="https://libreboot.org/faq/#firmware-ec">EC firmware</a>
- 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:
- </p>
- <ul>
- <li><a href="https://libreboot.org/docs/install/index.html#flashrom">https://libreboot.org/docs/install/index.html#flashrom</a></li>
- <li><a href="http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk">http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk</a></li>
- </ul>
- <p>
- 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.
- </p>
- <p>
- Updated EC firmware has several advantages e.g.
- bettery battery handling.
- </p>
-
- </div>
- <div class="section">
-
- <h2 id="compatibility_noblobs">Compatibility (without blobs)</h2>
-
- <div class="subsection">
- <h3 id="hwvirt">Hardware virtualization (vt-x)</h3>
- <p>
- The R400, when run without CPU microcode updates in coreboot, currently kernel panics
- if running QEMU with vt-x enabled on 2 cores for the guest. With a single core enabled
- for the guest, the guest panics (but the host is fine). Working around this in QEMU
- might be possible; if not, software virtualization should work fine (it's just slower).
- </p>
- <p>
- On GM45 hardware (with libreboot), make sure that the <i>kvm</i> and <i>kvm_intel</i> kernel modules
- are not loaded, when using QEMU.
- </p>
- <p>
- The following errata datasheet from Intel might help with investigation:
- <a href="http://download.intel.com/design/mobile/specupdt/320121.pdf">http://download.intel.com/design/mobile/specupdt/320121.pdf</a>
- </p>
- </div>
-
- </div>
-
- <div class="section">
-
- <p>
- The R400 is almost identical to the X200, code-wise. See <a href="x200.html">x200.html</a>.
- </p>
-
- <p>
- TODO: put hardware register logs here like on the <a href="x200.html">X200</a> and <a href="t400.html">T400</a> page.
- </p>
-
- </div>
-
- <div class="section">
-
- <p>
- Copyright &copy; 2014, 2015 Leah Rowe &lt;info@minifree.org&gt;<br/>
- Permission is granted to copy, distribute and/or modify this document
- under the terms of the Creative Commons Attribution-ShareAlike 4.0 International license
- or any later version published by Creative Commons;
-
- A copy of the license can be found at <a href="../cc-by-sa-4.0.txt">../cc-by-sa-4.0.txt</a>
- </p>
-
- <p>
- Updated versions of the license (when available) can be found at
- <a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode">https://creativecommons.org/licenses/by-sa/4.0/legalcode</a>
- </p>
-
- <p>
- UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
- EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
- AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
- ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
- IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
- WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
- PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
- ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
- KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
- ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
- </p>
- <p>
- TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
- TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
- NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
- INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
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- </p>
- <p>
- The disclaimer of warranties and limitation of liability provided
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- possible, most closely approximates an absolute disclaimer and
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-
- </div>
-
-</body>
-</html>