Re: [Linux-fbdev-devel] no backlight on radeon after recent kernel"upgrade"s
From: James Simmons
Date: Thu Feb 22 2007 - 10:56:02 EST
> On Thu, Feb 22, 2007 at 01:11:18AM +0000, James Simmons wrote:
> > > *$> grep BACKLIGH /boot/config-2.6.20
> > > # CONFIG_FB_BACKLIGHT is not set
> > > CONFIG_BACKLIGHT_LCD_SUPPORT=y
> > > CONFIG_BACKLIGHT_CLASS_DEVICE=m
> > > CONFIG_BACKLIGHT_DEVICE=y
> > You need to explictly enable the backlight for your fbdev driver. It
> > doesn't do the selecting magically for you.
> > Jus do a make "favorite"config and go to the fbdev menu and select the
> > backlight option for your fbdev driver.
> I would think that we'd always want to enable the backlight.
> How are people supposed to Just Know that the kernel defaults to a black
I just tested various confirations of backlight support. Backlight is
ALWAYS selected by default when you select a particular fbdev driver that
has backlight support. You just have the option to turn it off if you
want. These problems are showing up because of stale .config files.
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