Messages in this thread | | | Date | Wed, 12 Dec 2007 13:12:04 -0800 | From | "H. Peter Anvin" <> | Subject | 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 <rene.herman@gmail.com> 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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