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Date:      Thu, 06 May 2004 09:08:49 +0200
From:      Hendrik Hasenbein <hhasenbe@techfak.uni-bielefeld.de>
To:        Kenneth Culver <culverk@sweetdreamsracing.biz>
Cc:        Johan Pettersson <manlix@demonized.net>
Subject:   Re: nVidia FX Support?
Message-ID:  <4099E481.9090201@techfak.uni-bielefeld.de>
In-Reply-To: <20040505224110.egwww084ck8w8scc@www.sweetdreamsracing.biz>
References:  <40982623.2090804@bellsouth.net> <409947B8.6050804@mitre.org> <20040505161811.ca8s4c88s48ckoos@www.sweetdreamsracing.biz> <200405061102.57036.doconnor@gsoft.com.au> <20040505224110.egwww084ck8w8scc@www.sweetdreamsracing.biz>

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Kenneth Culver wrote:

> Quoting Daniel O'Connor <doconnor@gsoft.com.au>:
> 
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> On Thu, 6 May 2004 05:48, Kenneth Culver wrote:
>>
>>> > If it still hangs, or is unstable, you might try forcing the AGP 
>>> down to
>>> > 4x or 2x.  Many motherboards are unstable at 8x.
>>>
>>> I'm thinking it's because I had the XFree86-Server-Snap port 
>>> installed...
>>> that nvidia driver wasn't designed to work with that server. Also, I 
>>> have
>>> the acpi module loaded, and I've heard of that causing problems. The 
>>> card
>>> works fine in 8x mode in windows, so I don't think that's the problem.
>>
>>
>> The Windows drivers could have workarounds for broken AGP hardware (ie 
>> the AGP
>> driver itself)
>>
> I don't think the AGP hardware is broken, but BSD can't seem to route the
> interrupt correctly for the AGP port. It cause the video card to be 
> routed to
> IRQ 11 in FreeBSD, but in Windows, it is routed to irq 16. They should 
> be the
> same in both OS's, and since it works in windows, I'm assuming it's FreeBSD
> that's broken.

No they don't need to be reported as the same interrupt. Just look at 
APIC vs non-APIC. IRQ11 looks like non-APIC, IRQ16 is most likely APIC 
driven.

If you have agp in your kernel, remove that line and preload the 
nvidia.ko from the bootloader. That way my system works with a 5900XT.
(nforce2, no apic, acpi enabled)

Hendrik



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