linux-kernel - Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

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Date:	Mon, 31 Dec 2007 15:56:57 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bodo Eggert <7eggert@....de>
Cc:	"H. Peter Anvin" <hpa@...or.com>, 7eggert@....de,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rene Herman <rene.herman@...access.nl>, dpreed@...d.com,
	Islam Amer <pharon@...il.com>, Pavel Machek <pavel@....cz>,
	Ingo Molnar <mingo@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

On Mon, 31 Dec 2007 15:39:02 +0100 (CET)
> > Actually there were, and I sent numerous people patches for that back in
> > ISA days. 
> 
> Are you talking about VGA cards requiring a delay between outb index/outb 
> data, VGA cards barfing on outw or systems barfing on outb(0x80,42)?

VGA cards barfing on outw - on some trident at least it would cause weird
display messups when scrolling the text console that went right the next
scroll.
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