linux-kernel - Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys

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Message-Id: <1239678232.7661.256.camel@rzhang-dt>
Date:	Tue, 14 Apr 2009 11:03:52 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Niel Lambrechts <niel.lambrechts@...il.com>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux.kernel" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control
	brightness with hotkeys

On Tue, 2009-04-14 at 09:02 +0800, Zhang Rui wrote:
> Niel,
> 
> please make sure CONFIG_ACPI_VIDEO is set,
> please attach the full dmesg output.
> 
and please make sure the patch at
http://patchwork.kernel.org/patch/18010/
is applied on top of the previous one.

thanks,
rui


> thanks,
> rui
> 
> On Tue, 2009-04-14 at 02:20 +0800, Niel Lambrechts wrote:
> > On 04/13/2009 05:18 PM, Niel Lambrechts wrote:
> > > On 04/13/2009 03:53 AM, Zhang Rui wrote:
> > >   
> > >> please attach the acpidump output.
> > >> please apply this patch and see if it helps,
> > >> http://patchwork.kernel.org/patch/17339/
> > >>   
> > >>     
> > > Hi,
> > >
> > > The patch you mention above has no effect when applied to the latest
> > > 2.6.30-rc1 git kernel. I'm still unable to control brightness, and the
> > > display is still blank on resume (unless I press both a keyboard key and
> > > touch the synaptic pad).
> > >
> > > dmesg shows:
> > > thinkpad_acpi: ThinkPad ACPI Extras v0.22
> > > thinkpad_acpi: http://ibm-acpi.sf.net/
> > > thinkpad_acpi: ThinkPad BIOS 6FET50WW (1.20 ), EC 7VHT12WW-1.01
> > > thinkpad_acpi: Lenovo ThinkPad W500, model 40622XG
> > > thinkpad_acpi: radio switch found; radios are enabled
> > > thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness
> > > control, supported by the ACPI video driver
> > > thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
> > > Registered led device: tpacpi::thinklight
> > > Registered led device: tpacpi::power
> > > Registered led device: tpacpi::standby
> > > thinkpad_acpi: Standard ACPI backlight interface available, not loading
> > > native one.
> > > pci 0000:00:02.0: power state changed by ACPI to D0
> > >
> > > but /sys/class/backlight still is empty.
> > >
> > > acpidump output attached, please let me know if I can test anything else
> > > or provide more info...
> > >   
> > I've just retried this with the latest Lenovo firmware *2.12-1.01
> > *6FET64WW (which came out last week). It still gives the same bad result
> > though...
> > 
> > I attach acpidump again in case it matters after upgrading the BIOS.
> > 
> > cheers
> > Niel
> > 

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