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Date: Sat, 22 Aug 2009 17:10:33 +0200
From: Mario <rety@...zta.onet.pl>
To: Maxim Levitsky <maximlevitsky@...il.com>
Cc: "linux-pm" <linux-pm@...ts.linux-foundation.org>,
"linux-kernel" <linux-kernel@...r.kernel.org>
Subject: Re: ACPI locks hardware devices when it doesn't detect vista
Hi,
I tried to start the system with aspi=off, but as I thought system won't
start. It hangs at the same beginning. Probably because RTC and other stuff
normaly controled by acpi stops working.
Kind Regards
Mario
Saturday 22 of August 2009 14:48:30 Maxim Levitsky wrote:
> Hi,
>
> <joke>
> This should be brought to a Microsoft antitrust case...
> </joke>
>
>
> Today many notebooks ship with a embedded infrared receiver.
> In Vista there is new subsystem that decodes these signals.
> (of course it works only with Microsoft Certificated Remotes (TM)...)
>
> The receiver is usually presented to system as a pnp device
> (using acpi tables)
>
> It turns out that some bioses actually use the OSI, ACPI feature of the
> operation system to detect if running inside Vista. If not they disable
> the infrared receiver.
>
> On my system this it is still tolerable:
>
> Device (MIR)
> {
> Name (_HID, EisaId ("ENE0100"))
> Method (_STA, 0, NotSerialized)
> {
> If (LGreaterEqual (OSYS, 0x07D6))
> {
> If (LOr (And (OTHR, 0x02), And (OTHR, 0x40)))
> {
> Return (0x00)
> }
> Else
> {
> Return (0x0F)
> }
> }
> Else
> {
> Return (0x00)
> }
> }
>
> But not so, on Mairo's system:
>
> Device (MIR)
> {
> Name (_HID, EisaId ("ENE0100"))
> Method (_STA, 0, NotSerialized)
> {
> If (LAnd (MCIR, LEqual (OSYS, 0x07D6)))
> {
> Return (0x0F)
> }
> Else
> {
> Store (Zero, ^^LPCB.IOR2)
> Return (Zero)
> }
> }
>
> .......
>
> Method (_WAK, 1, NotSerialized)
> {
> .......
> If (Not (LAnd (MCIR, LEqual (OSYS, 0x07D6))))
> {
> Store (Zero, \_SB.PCI0.LPCB.IOR2)
> }
>
>
> .....
>
> Scope (_SB)
> {
> Method (_INI, 0, NotSerialized)
> {
> If (DTSE)
> {
> TRAP (0x47)
> }
>
> Store (0x07D0, OSYS)
> If (CondRefOf (_OSI, Local0))
> {
> If (_OSI ("Linux"))
> {
> Store (One, LINX)
> Store (Zero, ECDY)
> }
>
> If (_OSI ("Windows 2001"))
> {
> Store (0x07D1, OSYS)
> }
>
> If (_OSI ("Windows 2001 SP1"))
> {
> Store (0x07D1, OSYS)
> }
>
> If (_OSI ("Windows 2001 SP2"))
> {
> Store (0x07D2, OSYS)
> }
>
> If (_OSI ("Windows 2006"))
> {
> Store (0x07D6, OSYS)
> }
>
> If (LEqual (TPMV, One))
> {
> If (LLessEqual (OSYS, 0x07D2))
> {
> TRAP (0x49)
> }
> }
> }
>
> If (LAnd (MPEN, LEqual (OSYS, 0x07D1)))
> {
> TRAP (0x3D)
> }
>
> TRAP (0x2B)
> }
> }
>
> We have tried to boot the system with acpi_osi="Windows 2006", but it
> didn't help (kernel log confirmed that this parameter was set)
>
> The only explanation I think of is ether his laptop is whitelisted on
> osi=Linux, or that _SB._INI is called by linux _after_ MIR._STA
> or that acpi_osi isn't yet in charge when _SB._INI is called.
>
>
> The kernel in question is quite recent kernel, (2.6.30.5 from debian
> unstable).
>
>
> The only way I managed to 'enable' this device is to
> do 'sudo setpci -s 00:1f.0 0x88.W=0x701'
>
> Or in other words undo the damage done by these ACPI commands.
>
> Mairo, can you boot the system with acpi=off, and then poke the cir IO
> range (0x700-0x703) ?
>
>
>
> Best regards,
> Maxim Levitsky
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