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Thread-Topic: [acpi-jp 2499] EC was: RE: acpi and cpu performance states
Thread-Index: AcNSzhc5rLT//3ODQMStLMAiW7tGawADR8PQ
From: "Grover, Andrew" <andrew.grover@intel.com>
To: "Nate Lawson" <nate@root.org>
Cc: <acpi-jp@jp.FreeBSD.org>
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Date: Fri, 25 Jul 2003 11:48:08 -0700
X-Sequence: acpi-jp 2507
Subject: [acpi-jp 2507] RE: EC was: RE: acpi and cpu performance states
Sender: owner-acpi-jp@jp.FreeBSD.org
X-Originator: andrew.grover@intel.com
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+030702

> From: Nate Lawson [mailto:nate@root.org]=20
> > This T40 I'm borrowing is exhibiting what appear to be EC-related
> > issues. I think the Linux and FreeBSD drivers are now=20
> roughly comparable
> > (correct me if I'm wrong) except that FreeBSD's has better=20
> polling. So,
> > do you have reports of success or failure of your latest EC=20
> code on IBM
> > T30 or T40 laptops?
>=20
> Please cvsup and enable hw.acpi.verbose=3D1 and send me the full dmesg
> output if you are getting AE_NO_HARDWARE_RESPONSE errors.  If=20
> not, it's
> probably not an EC problem.

Arrgh. You want me to install FreeBSD on the T40? I was willing to do
this but the installer wasn't able to use the onboard Intel e1000, and
using a cardbus/pcmcia NIC causes the kernel to trap:

Fatal trap 12: page fault while in kernel mode
fault virtual address =3D 0x91e210a5
fault code =3D supervisor write, page not present
instruction pointer =3D 0x8:0xc2a59700
frame pointer =3D 0x10:0xcd2f2d0c
code segment =3D base 0x0, limit 0xfffff, type 0x1b
	=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D 24 (irq11: cbb0 cbb1++*)
trap number =3D 12
panic: page fault

This happens with ACPI enabled or disabled.

In more general terms, can you maybe just describe your solution for
no-response errors? Did you just increase the timeout or what, exactly?

Regards -- Andy
