From: Keith Owens <kaos@ocs.com.au>
To: Jan Kasprzak <kas@fi.muni.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Altix hang on boot with 2.6.8+ 
In-reply-to: Your message of "Mon, 03 Jan 2005 13:52:00 BST."
             <20050103125200.GK26303@fi.muni.cz> 
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Date: Tue, 04 Jan 2005 00:00:49 +1100
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On Mon, 3 Jan 2005 13:52:00 +0100, 
Jan Kasprzak <kas@fi.muni.cz> wrote:
>I cannot boot a 2.6.8 or 2.6.10 kernel on my SGI Altix - it hangs during
>boot after printing this:
>
>[...]
>CPU 0: base freq=200.000MHz, ITC ratio=14/2, ITC freq=1400.000MHz+/--1ppm
>Console: colour dummy device 80x25

The Altix console changed from ttyS0 to ttySG0 around 2.6.8.  You need to
  mknod ttySG0 c 204 40
and change elilo.conf to use console=ttySG0 for the newer kernels.  You
also need to change /etc/inittab from ttyS0 to ttySG0.

Most Altix systems running 2.6 have both ttyS0 and ttySG0 defined in
/dev and have two lines in /etc/inittab to allow switching between old
and new kernels.

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