emily
/
libreboot


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141
							<!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/index.html#flashrom">../install/index.html#flashrom</a>
			</p>
			
			<p>
				<a href="index.html">Back to previous index</a>.
			</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">

		<h1 id="lcd_compatibility">LCD compatibly</h1>
			<p>
				Not all LCD panels are compatible yet. See <a href="gm45_lcd.html">gm45_lcd.html</a>.
			</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 GNU Free Documentation License, Version 1.3
			or any later version published by the Free Software Foundation;
			with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
			A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a>
		</p>

		<p>
			Updated versions of the license (when available) can be found at
			<a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</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,
			COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
			USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
			ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
			DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
			IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
		</p>
		<p>
			The disclaimer of warranties and limitation of liability provided
			above shall be interpreted in a manner that, to the extent
			possible, most closely approximates an absolute disclaimer and
			waiver of all liability.
		</p>
		
	</div>

</body>
</html>