linux-kernel - Re: CONFIG_ACPI_VIDEO on Thinkpad blanks display.

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Message-ID: <20080925190930.GA17184@net-ronin.org>
Date:	Thu, 25 Sep 2008 12:09:30 -0700
From:	carbonated beverage <ramune@...-ronin.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: CONFIG_ACPI_VIDEO on Thinkpad blanks display.

On Thu, Sep 25, 2008 at 11:07:46AM +0100, Matthew Garrett wrote:
> > Without CONFIG_ACPI_VIDEO, the above message don't appear.  From this point,
> > any pointers on figuring out why the ACPI features makes the screen go blank?
> 
> Yes. X assumed that any ACPI key press was a request to switch the video 
> output. Upgrade X.

Since CONFIG_ACPI_VIDEO wasn't required before 2.6.26.x to change the LCD
brightness, I'd rather the kernel go back to whatever it was doing for
2.6.25.x.  Upgrading X past what's currently packaged by the distribution
just to get a new kernel working is somewhat of a pain.

What change linked the brightness keys to CONFIG_ACPI_VIDEO?

-- DN
Daniel
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