Re: [PATCH] Platform: samsung-laptop: add DMI information for SamsungN150 Plus

From: Corentin Chary
Date: Mon Dec 26 2011 - 04:49:56 EST

On Sat, Dec 24, 2011 at 3:28 PM, David Herrmann
<dh.herrmann@xxxxxxxxxxxxxx> wrote:
> On Sat, Dec 24, 2011 at 3:20 PM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote:
>> On Sat, Dec 24, 2011 at 02:12:57PM +0000, Andrzej Prochyra wrote:
>>> 'acpi_video0' not functional. ÂBrightness can be controlled through
>>> intel_backlight interface. ÂThere 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 Âintel_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

Corentin Chary
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