linux-kernel - Re: [PATCH] Platform: samsung-laptop: add DMI information for Samsung N150 Plus

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Date:	Mon, 26 Dec 2011 11:22:01 +0100
From:	David Herrmann <dh.herrmann@...glemail.com>
To:	Corentin Chary <corentin.chary@...il.com>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Andrzej Prochyra <andrzej@...chyra.name>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Platform: samsung-laptop: add DMI information for Samsung
 N150 Plus

On Mon, Dec 26, 2011 at 10:49 AM, Corentin Chary
<corentin.chary@...il.com> wrote:
> On Sat, Dec 24, 2011 at 3:28 PM, David Herrmann
> <dh.herrmann@...glemail.com> wrote:
>> On Sat, Dec 24, 2011 at 3:20 PM, Matthew Garrett <mjg59@...f.ucam.org> wrote:
>>> On Sat, Dec 24, 2011 at 02:12:57PM +0000, Andrzej Prochyra wrote:
>>>> 'acpi_video0' not functional.  Brightness can be controlled through
>>>> intel_backlight interface.  There are 21 brightness levels and the
>>>> backlight can be turned off.
>>>
>>> If acpi_video0 doesn't work then we either need to work out why it's not
>>> working or make it vanish completely, so this patch isn't the correct
>>> approach.
>>
>> Just to make clear, intel_backlight isn't working properly either. If
>> my laptop boots with backlight at 50% then intel_backlight will only
>> work in the range 0%-50% on my machine. If I use the samsung module to
>> set it to 100% then  intel_backlight works correctly in the range
>> 0-100% until next reboot/suspend.
>>
>> So I'd recommend staying with the samsung module and disabling the
>> acpi_backlight entirely. The samsung module is the only backlight
>> control which works properly.
>
> Can I take a look at the DSDT to see how it's broken ?
> If it's really not functional, then it should be added to the
> blacklist in video_detect.c

Raw and disassembled dsdt is attached.
Cheers
David

Download attachment "dsdt.dat" of type "application/octet-stream" (23465 bytes)

View attachment "dsdt.dsl" of type "text/x-dsl" (198437 bytes)