linux-kernel - Re: [PATCH] Platform: add Samsung Laptop platform driver

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Date:	Sun, 13 Mar 2011 09:18:23 -0700
From:	Greg KH <greg@...ah.com>
To:	Nikolai Kondrashov <spbnick@...il.com>
Cc:	Richard Schütz <r.schtz@...nline.de>,
	Matthew Garrett <mjg@...hat.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] Platform: add Samsung Laptop platform driver

On Sun, Mar 13, 2011 at 03:02:00PM +0200, Nikolai Kondrashov wrote:
> On 03/13/2011 12:55 PM, Richard Schütz wrote:
> >That sounds like the driver is interfering with the ACPI video driver.
> >Add "acpi_backlight=vendor" to your kernel boot parameters and try again.
> Thank you, this helped :)
> 
> Greg, is it OK that both 0 and 1 backlight values have the same effect on
> brightness?

I really don't know, sorry.  Try messing with the actual_brightness file
instead, that's the one to use.

thanks,

greg k-h
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