Re: [Bug 9528] x86: Increase PCIBIOS_MIN_IO to 0x1500 to fixnForce 4 suspend-to-RAM

[Ingo Molnar]

* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> > Why:
> > 
> > After debugging _PTS() in the DSDT, it turns out these nVidia boards are
> > trying to write to an IO port > 0x1000 (0x142E) during suspend. Before the
> > re-ordering, we got away with this.
> 
> Very interesting.
> 
> HOWEVER.
> 
> I'd much rather figure out what the magic IO resource is that clashes.

Carlos, could you please run the following script as root:

  http://redhat.com/~mingo/misc/probe-ports.sh

and send us the resulting probe-ports.txt file?

This script will probe all unused ports as per /proc/ioports and will 
list "suspect" IO port areas: ones that do not produce the expected 0xff 
default reply from unclaimed IO ports. Magic chipset register areas can 
potentially be mapped this way.

[ CAREFUL: This probes IO ports which might in theory trigger various
  nastiness such as lockups. I this on a few boxes and the script
  worked, but save any work in case you get lockups. ]

	Ingo
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