From 3a61a752b35aed42fb78231c961bb4d16b7846fb Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Sun, 06 Dec 2015 11:34:07 -0500
Subject: FAQ: ATI GPUs on GM45 hardware

---
(limited to 'site/faq')

diff --git a/site/faq/index.php b/site/faq/index.php
index a0a41d4..33b9884 100644
--- a/site/faq/index.php
+++ b/site/faq/index.php
@@ -53,6 +53,7 @@
 						</ul>
 					</li>
 					<li><a href="#librem">Will the Purism Librem laptops be supported?</a></li>
+					<li><a href="#t400t500ati">Will libreboot work on a ThinkPad T400 or T500 with an ATI GPU?</a></li>
 					<li><a href="#thinkpads">Will the latest Thinkpad models be supported?</a></li>
 					<li><a href="#desktops">Will desktop/server hardware be supported?</a></li>
 					<li><a href="#randomhardware">Hi, I have &lt;insert random system here&gt;, is it supported?</a></li>
@@ -348,6 +349,25 @@
 					<a href="#pagetop">Back to top of page</a>
 				</p>
 
+			<h2 id="t400t500ati">Will libreboot work on a ThinkPad T400 or T500 with an ATI GPU? <span class="r"><a href="#t400t500ati">#t400t500ati</a></span></h2>
+				<p>
+					Short answer: yes.
+				</p>
+				<p>
+					These laptops use what is called <i>switchable graphics</i>, where it will have an Intel or ATI GPU.
+					Coreboot will allow you to set (using nvramtool) a parameter, specifying whether you would like to use
+					Intel or ATI. The ATI GPU lacks free native graphics initialization in coreboot, unlike the Intel GPU.
+				</p>
+				<p>
+					Libreboot modifies coreboot, in such a way where this nvramtool setting is ignored. Libreboot will just
+					assume that you want to use the Intel GPU. Therefore, the ATI GPU is completely disabled on these laptops.
+					Intel is used instead, with the free native graphics initialization (VBIOS replacement) that exists in
+					coreboot.
+				</p>
+				<p>
+					<a href="#pagetop">Back to top of page</a>
+				</p>
+
 			<h2 id="thinkpads">Will the latest ThinkPad models be supported? <span class="r"><a href="#thinkpads">#thinkpads</a></span></h2>
 				<p>
 					The latest ThinkPad generation supported in libreboot are the ones
--
cgit v0.9.1