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From: Samuel Sieb <samuel@sieb.net>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: kernel won't boot on a Cyrix MediaGXm (Geode )
Date: Sun, 20 Jul 2008 22:11:46 -0700	[thread overview]
Message-ID: <48841A92.4020301@sieb.net> (raw)

I have a computer here with a CPU that the BIOS identifies as:
Cyrix MediaGXm/Cx5530 Unicorn Revision 1.19.3B

kernel 2.6.14 identifies it as:
vendor_id	: Geode by NSC
cpu family	: 5
model		: 9
model name	: Geode(TM) Integrated Processor by National Semi
stepping	: 1

I can't boot any kernel later than 2.6.22 on it.  Anything later either 
hangs or gives random kernel panics while booting.  I tracked down the 
problem to a specific commit:

commit f25f64ed5bd3c2932493681bdfdb483ea707da0a
Author: Juergen Beisert <juergen@kreuzholzen.de>
Date:   Sun Jul 22 11:12:38 2007 +0200

     x86: Replace NSC/Cyrix specific chipset access macros by inlined 
functions.

Reversing the patch (compensating for kernel changes) let me boot a 
2.6.25 kernel.  I realize the patch is supposed to fix something that 
didn't work right, but I didn't have a problem before and I do now. :-)

             reply	other threads:[~2008-07-21  5:12 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-21  5:11 Samuel Sieb [this message]
2008-07-21  6:28 ` kernel won't boot on a Cyrix MediaGXm (Geode ) Juergen Beisert
2008-07-22  5:16   ` Samuel Sieb
2008-07-22  8:08     ` Juergen Beisert
2008-07-23  7:13       ` Samuel Sieb
2008-07-21  6:36 ` Rafael C. de Almeida
2008-07-21 11:47   ` Ingo Molnar
2008-07-22  5:10     ` Samuel Sieb
2008-07-22 10:24       ` Ingo Molnar
2008-07-22 10:51         ` Juergen Beisert
2008-07-23  7:18           ` Samuel Sieb
2008-07-28 15:32             ` Ingo Molnar
2008-07-28 17:58               ` Samuel Sieb
2008-07-29  9:18                 ` Ingo Molnar
2008-07-29  8:15               ` Juergen Beisert
2008-08-07  5:06               ` Samuel Sieb
2008-08-20  9:32                 ` Ingo Molnar
2008-08-20  9:44                   ` Juergen Beisert
2008-08-20 10:45                     ` Ingo Molnar
2008-08-20 11:03                       ` Juergen Beisert
2008-08-20 11:20                         ` Ingo Molnar

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