linux-kernel - Re: 2.6.25-rc2 Regression Thinkpad acpi

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Message-ID: <20080313150945.GC17940@kernel.dk>
Date:	Thu, 13 Mar 2008 16:09:45 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Alexey Starikovskiy <aystarik@...il.com>
Cc:	Lukas Hejtmanek <xhejtman@....muni.cz>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Arkadiusz Miskiewicz <arekm@...en.pl>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: 2.6.25-rc2 Regression Thinkpad acpi

On Thu, Mar 13 2008, Alexey Starikovskiy wrote:
> Jens Axboe wrote:
> >On Thu, Mar 13 2008, Alexey Starikovskiy wrote:
> >  
> >>Jens Axboe wrote:
> >>    
> >>>On Thu, Mar 13 2008, Alexey Starikovskiy wrote:
> >>> 
> >>>      
> >>>>Jens Axboe wrote:
> >>>>   
> >>>>        
> >>>>>On Thu, Mar 13 2008, Lukas Hejtmanek wrote:
> >>>>>
> >>>>>     
> >>>>>          
> >>>>>>On Thu, Mar 13, 2008 at 01:59:34PM +0100, Jens Axboe wrote:
> >>>>>>  
> >>>>>>       
> >>>>>>            
> >>>>>>>The BIOS isn't that old, probably updated it a couple of months ago.
> >>>>>>>    
> >>>>>>>         
> >>>>>>>              
> >>>>>>I use the latest BIOS for my T61 and it just works. At least the 
> >>>>>>event is
> >>>>>>generated either for acpid or for Xserver.
> >>>>>>  
> >>>>>>       
> >>>>>>            
> >>>>>This is an x60, so there may be other differences there.
> >>>>>
> >>>>>
> >>>>>     
> >>>>>          
> >>>>There are was some playing with acpi_osi=Linux in this timeframe, known
> >>>>to deal with sound buttons too.
> >>>>Some of Thinkpads were inserted into the blacklist to need this OSI.
> >>>>It might be that your Thinkpad needs it too...
> >>>>   
> >>>>        
> >>>Please talk to me like I'm an ACPI ignorant - because I am. Where is
> >>>this blacklist?
> >>>
> >>> 
> >>>      
> >>drivers/acpi/blacklist.c:485.
> >>You probably could set acp_osi=Linux as kernel parameter to check if it 
> >>helps.
> >>    
> >
> >I booted with acpi_osi=Linux and it has made no difference.
> >
> >  
> What is the last kernel there these buttons work?

It worked fine in 2.6.24, not sure when it broke in 2.6.25-rcX, but it
was some time ago. I initially thought it was the same issue and would
be fixed by the revert of 208c70a45624400fafd7511b96bc426bf01f8f5e, but
that turned out not to be the case.

-- 
Jens Axboe

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