linux-kernel - Re: ACPI crash on lid close

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Date:	Wed, 12 Nov 2008 05:21:15 +0000
From:	Sergio Monteiro Basto <sergio@...giomb.no-ip.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: ACPI crash on lid close - SMP race?

Hi, 
On my laptop which is not SMP , is a Intel Centrino 1.7Mhz , I have a
little stranger problem my lid button (backlight) doesn't work with
_DOS=0 after load Hal service and on first boot. 
Like _DOS=0 on some laptop crash on lid close. 

The report #6001 , made by other Sérgio (not me), which complains on
system freeze when _DOS=1 and on switching display. 
Switching display for him means on switching to CTR or to monitor with
fn+ f4. With acpi=off don't freeze because that have the event , and
with acpi on, freeze , so IMHO, this is a problem probably not related
with _DOS value, Sérgio Luis , in last comment
( http://bugzilla.kernel.org/show_bug.cgi?id=6001#c51 ) wrote with
updated kernel freeze in the 2 cases. 

But this report introduce a patch in main kernel that change _DOS from 1
to 0 , which I think at least should be reverted.

I'd love learn more about this switches , if someone can help me with
some tip , many thanks,

On Tue, 2008-11-11 at 02:05 +0000, Matthew Garrett wrote: 
> On Tue, Nov 11, 2008 at 09:59:38AM +0800, Zhang Rui wrote:
> 
> > oops. sorry, I mean system crashes on lid close if _DOS=0 on some UP
> > platform.
> 
> Oh, ugh. I don't have any with that issue, but that ought to be 
> "interesting" to fix.
> 
-- 
Sérgio M.B.

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