linux-kernel - Re: Math-emu kills the kernel on Athlon64 X2

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Message-ID: <9a8748490609181747i9da3107q593ab99ced48bced@mail.gmail.com>
Date:	Tue, 19 Sep 2006 02:47:34 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Linus Torvalds" <torvalds@...l.org>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	billm@...bpc.org.au, billm@...urbia.net
Subject: Re: Math-emu kills the kernel on Athlon64 X2

On 19/09/06, Linus Torvalds <torvalds@...l.org> wrote:
[...]
>
> You can try booting with "no387 nofxsr" to get rid of at least _that_
> particular issue, but there might be other cases like that in the MMX
> code, for example ("nofxsr" should disable both the FXSR and XMM
> capabilities as far as the kernel is concerned).
>
> If that works (or gets you further), we should just make "no387" disable
> FXSR by itself.
>
> Worth testing, and you can do it without even recompiling the kernel,
> since we already have that kernel command line flag.
>

Booting with: vga=normal no387 nofxsr
gets me no forther.   These are all the messages I get:

 boot: 2.6.18rc7git2 vga=normal no387 nofxsr
 Loading 2.6.18rc7git2...................................
 BIOS data check successful
 Uncompressing Linux... Ok, booting the kernel.

And then the system hangs and requires a power cycle.

So unfortunately that does't help much :-(


-- 
Jesper Juhl <jesper.juhl@...il.com>
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