linux-kernel - Linux detects only 2.6GiB RAM in legacy boot

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Message-ID: <CAFLxGvyd032g4CYQfS8Woz+qZHvXAQa3s_cj7TOC=XVO1-HONw@mail.gmail.com>
Date:	Sat, 19 Jan 2013 19:43:03 +0100
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Linux detects only 2.6GiB RAM in legacy boot

Hi,

My shiny new Thinkpad T430u comes with UEFI.
To avoid broken bootloaders/distros I've enabled legacy boot mode.

But Linux seems to detect only 2.6GB of RAM.
[    0.000000] On node 0 totalpages: 1008669
vs.
[    0.000000] On node 0 totalpages: 701239

Both dmesg logs are attached.
This happens also with 3.7.x.

Is there anything I can do or is this a plain UEFI/BIOS bug?

-- 
Thanks,
//richard

View attachment "dmesg_efi.txt" of type "text/plain" (73521 bytes)

View attachment "dmesg_legacy.txt" of type "text/plain" (66009 bytes)