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From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Rafael J. Wysocki" <rjw@sisk.pl>, Greg KH <gregkh@suse.de>,
	Thomas Gleixner <tglx@linutronix.de>, Len Brown <lenb@kernel.org>,
	bugme-daemon@bugzilla.kernel.org
Subject: Re: [Bug 9528] x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM
Date: Sun, 23 Dec 2007 20:19:37 +0100	[thread overview]
Message-ID: <20071223191937.GA28836@elte.hu> (raw)
In-Reply-To: <alpine.LFD.0.9999.0712230933570.21557@woody.linux-foundation.org>



* 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

  parent reply	other threads:[~2007-12-23 19:20 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <200712231419.40207.carlos@strangeworlds.co.uk>
2007-12-23 16:30 ` x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM Rafael J. Wysocki
2007-12-23 17:57   ` Ingo Molnar
2007-12-23 18:00   ` Linus Torvalds
2007-12-23 22:20     ` Rafael J. Wysocki
2007-12-23 23:12       ` H. Peter Anvin
2007-12-24  0:09         ` Carlos Corbacho
2007-12-24  0:56           ` Linus Torvalds
2007-12-24  1:14             ` Linus Torvalds
2007-12-24  3:05               ` Carlos Corbacho
2007-12-24 13:44                 ` Rafael J. Wysocki
2007-12-24 18:34                   ` Linus Torvalds
2007-12-24 21:53                     ` Carlos Corbacho
2007-12-25 16:13                     ` Suspend code ordering (again) (was: Re: x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM) Rafael J. Wysocki
2007-12-26  4:11                       ` Linus Torvalds
2007-12-26 15:07                         ` Rafael J. Wysocki
2007-12-26 15:24                           ` Suspend code ordering (again) Alexey Starikovskiy
2007-12-26 17:50                             ` H. Peter Anvin
2007-12-25 12:12   ` x86: Increase PCIBIOS_MIN_IO to 0x1500 to fix nForce 4 suspend-to-RAM Pavel Machek
2007-12-25 12:28     ` Carlos Corbacho
2007-12-23 17:53 ` [Bug 9528] " Linus Torvalds
2007-12-23 17:58   ` Linus Torvalds
2007-12-23 19:19   ` Ingo Molnar [this message]
2007-12-23 19:29     ` Linus Torvalds
2007-12-23 20:43   ` Yinghai Lu
     [not found] <fa.Tr7qmPdet0rF2FSRX/94s2UEMSE@ifi.uio.no>
     [not found] ` <fa.n/XQFa64Zg8snHoyB/rrKzCvAL0@ifi.uio.no>
2007-12-24 16:59   ` Robert Hancock

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