Re: More info on port 80 symptoms on MCP51 machine.

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Alan Cox wrote:
On Wed, 12 Dec 2007 21:58:25 +0100
Rene Herman <[email protected]> wrote:

On 12-12-07 21:26, Rene Herman wrote:

On 12-12-07 21:07, David P. Reed wrote:
Someone might have an in to nVidia to clarify this, since I don't. In any case, the udelay(2) approach seems to be a safe fix for this machine.
By the way, _does_ anyone have a contact at nVidia who could clarify? Alan maybe? I'm quite curious what they did...

I don't. Nvidia are not the most open bunch of people on the planet. This
doesn't appear to be a chipset bug anyway but a firmware one (other
systems with the same chipset work just fine).

The laptop maker might therefore be a better starting point.

One wonders if it does some SMM trick to capture port 0x80 writes and attempt to haul them off for debugging; it almost sounds like some kind of debugging code got let out into the field.

	-hpa
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