linux-kernel - Re: Kohjinsha sleep problems

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Message-ID: <20080105213536.GA2307@elf.ucw.cz>
Date:	Sat, 5 Jan 2008 22:35:36 +0100
From:	Pavel Machek <pavel@....cz>
To:	Alessandro Guido <alessandro.guido@...il.com>
Cc:	ACPI mailing list <linux-acpi@...r.kernel.org>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: Kohjinsha sleep problems

HI!

> > On kohjinsha, wakeup code does not seem to be reached at all. I tried
> > looking around FACS, but it seems very empty:
> >
> > ...
> 
> The same on my laptop:
> 
> FACS @ 0x2fefafc0
>   0000: 46 41 43 53 40 00 00 00 62 12 00 00 00 00 00 00  FACS@...b.......
>   0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>   0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>   0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
> 
> 
> I've never been able to resume from STR with Linux (works with Windows Vista). 
> STD works, although I have to press the power button in order to
> resume.

Hmm, it is pretty empty on thinkpad x60, too, and s2ram actually works
here:

root@amd:/home/pavel# acpidump -t FACS
FACS @ 0x7f6f4000
  0000: 46 41 43 53 40 00 00 00 95 15 00 00 00 00 00 00 FACS@...........
  0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
  0020: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
  0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................

...and iasl actually segfaults here, too :-(

root@amd:/data/l/kohji# iasl -d FACS.x60.aml 

Intel ACPI Component Architecture
AML Disassembler version 20061109 [May 18 2007]
Copyright (C) 2000 - 2006 Intel Corporation
Supports ACPI Specification Revision 3.0a

Loading Acpi table from file FACS.x60.aml
Segmentation fault (core dumped)
root@amd:/data/l/kohji# 

...hmm, if it is buffer overflow, we have security problem in
iasl. Anyway, how do I decode FACS?
									Pavel

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