Messages in this thread | | | Date | Sun, 23 Dec 2007 20:19:37 +0100 | From | Ingo Molnar <> | Subject | Re: [Bug 9528] x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM |
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* Linus Torvalds <torvalds@linux-foundation.org> 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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