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

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Message-Id: <1239670956.7661.245.camel@rzhang-dt>
Date:	Tue, 14 Apr 2009 09:02:36 +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

Niel,

please make sure CONFIG_ACPI_VIDEO is set,
please attach the full dmesg output.

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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