Re: BX chipsets and 2.0.34pre

Glenn Lamb (
Wed, 20 May 1998 22:47:08 -0700 (PDT)

On Wed, 20 May 1998, Alan Cox wrote:

> Date: Wed, 20 May 1998 22:44:28 +0100 (BST)
> From: Alan Cox <>
> To:
> Subject: BX chipsets and 2.0.34pre
> If you are having problems with 2.0.34 then we think (thanks especially to
> Larry Augustin) we've found the problem. Back out the Cyrix patch in
> arch/i386/kernel/head.S
> Intel seem to have cunningly arranged that the Cyrix check stuff using I/O
> 0x22/0x23 happens to completely screw the settings on a BX motherboard, making
> 2.0.34pre* do weird things.
> I'll release another prepatch tomorrow (UK time) that will drop the Cyrix
> probing. Hopefully that will sort out the remaining 2.0.34 bug reports on
> the IDE, irq loss and weird crashes with BX

Well, my face is a tad red. I emailed Alan this morning stating this
solution did not work... it in fact did not at the time, but that was
because I had pulled out my net card for other reasons yesterday and
did not seat it properly when I put it back in. After just seating it
correctly, 2.0.34pre15 compiles and runs perfectly with head.S from
2.0.33. My apologies for the mixup and much thanks for getting this
figured out and fixed!

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