From bf2844dfd606312bdc75cc4363ff150c3c5c2833 Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Sat, 28 Mar 2015 18:38:09 -0400 Subject: Documentation (T400/R400): add notes about CPU compatibility --- diff --git a/docs/hcl/r400.html b/docs/hcl/r400.html index bb20416..bc14b04 100644 --- a/docs/hcl/r400.html +++ b/docs/hcl/r400.html @@ -16,10 +16,11 @@

ThinkPad R400

- -

- It is believed that all R400 laptops are compatible. + It is believed that all or most R400 laptops are compatible. + See notes about CPU compatibility + and switchable graphics for + potential incompatibilities.

diff --git a/docs/hcl/t400.html b/docs/hcl/t400.html index 0e4654d..6259ecd 100644 --- a/docs/hcl/t400.html +++ b/docs/hcl/t400.html @@ -16,10 +16,11 @@

ThinkPad T400

- -

- It is believed that all T400 laptops are compatible. + It is believed that all or most T400 laptops are compatible. + See notes about CPU compatibility + and switchable graphics for + potential incompatibilities.

diff --git a/docs/install/r400_external.html b/docs/install/r400_external.html index 383a93b..6e2e471 100644 --- a/docs/install/r400_external.html +++ b/docs/install/r400_external.html @@ -31,6 +31,42 @@

Back to main index

+ +
+ +

A note about CPUs

+

+ ThinkWiki has a list of CPUs + for this system. The Core 2 Duo P8400 and P8600 are believed to work in libreboot. + The Core 2 Duo P9400/P9600/T5870/5670 and Celeron M 575/585 are untested! +

+ +
+ +
+ +

A note about GPUs

+ +

+ This guide currently assumes that you have an Intel GPU (non-switchable). + Some T400 have switchable graphics (ATI), which means that you can choose between ATI or Intel + in the BIOS setup. When switching to Intel, is lenovobios not enabling ATI + (where ATI is disabled by default and the system uses the Intel chip), or are they + disabling it (where the system uses the ATI chip by default)? +

+ +

+ Basically, switchable graphics is untested, but it should be easy to get it working + (if it doesn't already work). +

+ +

CPU paste required

+ +

+ See #paste. +

+ +
@@ -182,6 +218,74 @@ Verifying flash... VERIFIED.

+ +
+ +

Thermal paste (IMPORTANT)

+ +

+ Because part of this procedure involved removing the heatsink, you will need to apply new paste. + Arctic Silver 5 is ok. You will also need isopropyl alcohol and an anti-static cloth to clean with. +

+ +

+ When re-installing the heatsink, you must first clean off all old paste with the alcohol/cloth. + Then apply new paste. AS5 is also much better than the default paste used on these machines. +

+ +

+ +

+ +
+ +
+ +

Wifi

+ +

+ The T400 typically comes with an Intel wifi chipset, which does not + work without proprietary software. For a list of wifi chipsets that + work without proprietary software, see + ../hcl/index.html#recommended_wifi. +

+ +

+ Some T400 laptops might come with an Atheros chipset, but this is 802.11g only. +

+ +

+ It is recommended that you install a new wifi chipset. This can only + be done after installing libreboot, because the original firmware has + a whitelist of approved chips, and it will refuse to boot if you + use an 'unauthorized' wifi card. +

+ +

+ The following photos show an Atheros AR5B95 being installed, to + replace the Intel chip that this T400 came with:
+ + +

+ +
+ +
+ +

Memory

+ +

+ You need DDR3 SODIMM PC3-8500 RAM installed, in matching pairs + (speed/size). Non-matching pairs won't work. You can also install a + single module (meaning, one of the slots will be empty) in slot 0. +

+ +

+ The following photo shows 8GiB (2x4GiB) of RAM installed:
+ +

+ +
diff --git a/docs/install/t400_external.html b/docs/install/t400_external.html index ce6484e..686c152 100644 --- a/docs/install/t400_external.html +++ b/docs/install/t400_external.html @@ -15,6 +15,7 @@

Flashing the T400 with a BeagleBone Black

+

Initial flashing instructions for T400.

This guide is for those who want libreboot on their ThinkPad T400 @@ -23,11 +24,21 @@ to recover.

-

Back to main index

-
+
+ +

A note about CPUs

+

+ ThinkWiki has a list of CPUs + for this system. The Core 2 Duo P8400, P8600 and P8700 are believed to work in libreboot. + The P9500, 9550 and P9600 are untested! +

+ +
+ +

A note about GPUs

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