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Date:	Sat, 15 Dec 2007 08:22:16 +0100
From:	Rene Herman <rene.herman@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Chuck Ebbert <cebbert@...hat.com>,
	Rene Herman <rene.herman@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"David P. Reed" <dpreed@...d.com>, Pavel Machek <pavel@....cz>,
	Andi Kleen <andi@...stfloor.org>,
	"linux-os (Dick Johnson)" <linux-os@...logic.com>,
	David Newall <david@...idnewall.com>,
	Paul Rolland <rol@...917.net>,
	Krzysztof Halasa <khc@...waw.pl>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, rol@...be.net
Subject: Re: More info on port 80 symptoms on MCP51 machine.

On 14-12-07 23:05, Chuck Ebbert wrote:

> On 12/12/2007 04:05 PM, H. Peter Anvin wrote:

>> Rene Herman wrote:

>>> By the way, _does_ anyone have a contact at nVidia who could clarify?
>>> Alan maybe? I'm quite curious what they did...
>>>
>>> Summary:
>>>
>>> Unless after booting with "acpi=off", outputs to port 0x80 (the legacy
>>> way to delay I/O) reliably, but not immediately, hang MCP51 machines.
>>> Outputs to port 0xed do not indicating it's a not a generic bus abort
>>> problem.
>>>
>> Sorry, the first sentence didn't parse unambiguously for me.  Do you
>> mean "acpi=off" works, or that "acpi=off" allows *subsequent* boots to
>> work?
>>
>> I have some people at nVidia I can probably ping.

Sorry, didn't see this again due to aforementioned horseshit ISP. "acpi=off" 
works it seems. Report from David Reed here:

http://lkml.org/lkml/2007/12/12/291

> Have them search on Google for:
> 
>   hp tx1000 noapic
> 
> :)

Rene.


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