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From: James Simmons <jsimmons@infradead.org>
To: Joel Becker <Joel.Becker@oracle.com>
Cc: Yaroslav Halchenko <lists@onerussian.com>,
	Richard Purdie <rpurdie@rpsys.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-fbdev-devel@lists.sourceforge.net,
	linux-kernel@vger.kernel.org
Subject: Re: [Linux-fbdev-devel] no backlight on radeon after recent kernel "upgrade"s
Date: Thu, 22 Feb 2007 15:55:24 +0000 (GMT)	[thread overview]
Message-ID: <Pine.LNX.4.64.0702221549530.29542@pentafluge.infradead.org> (raw)
In-Reply-To: <20070222020951.GR7920@ca-server1.us.oracle.com>


> 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
> LCD?

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.


  reply	other threads:[~2007-02-22 15:55 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-19  4:46 Yaroslav Halchenko
2007-02-19  8:04 ` Andrew Morton
2007-02-19  9:19   ` Richard Purdie
2007-02-21  5:56     ` Yaroslav Halchenko
2007-02-22  0:34       ` Richard Purdie
2007-02-22  1:07         ` James Simmons
2007-02-22  9:46           ` Richard Purdie
2007-02-22 15:18             ` James Simmons
2007-02-22  1:11       ` [Linux-fbdev-devel] " James Simmons
2007-02-22  2:09         ` Joel Becker
2007-02-22 15:55           ` James Simmons [this message]
2007-02-22 17:28             ` David Miller
2007-02-28 16:55               ` James Simmons
2007-03-01 10:57                 ` Richard Purdie
2007-03-01 21:08                   ` James Simmons
2007-02-21 22:18     ` Alex Romosan
2007-02-21 22:41       ` Richard Purdie
2007-02-21 23:17         ` Henrique de Moraes Holschuh
2007-02-22  0:12           ` Richard Purdie
2007-02-22  0:51             ` Henrique de Moraes Holschuh
2007-02-22  1:10               ` Richard Purdie
2007-02-22  2:13                 ` Henrique de Moraes Holschuh
2007-02-22  1:10               ` Henrique de Moraes Holschuh
2007-02-22  1:16                 ` ACPI: ibm-acpi: fix initial status of backlight device Henrique de Moraes Holschuh
2007-02-22 10:03                   ` Richard Purdie
2007-02-22 14:45                     ` Henrique de Moraes Holschuh
2007-02-22 18:19                       ` Henrique de Moraes Holschuh
2007-02-22 10:00                 ` no backlight on radeon after recent kernel "upgrade"s Richard Purdie
2007-02-22 14:56                   ` Henrique de Moraes Holschuh
2007-02-22 15:19                     ` Richard Purdie
2007-02-22 16:00                       ` James Simmons
2007-02-22 16:34                       ` Henrique de Moraes Holschuh
2007-02-22 17:08                         ` Richard Purdie
2007-02-21 23:51         ` Alex Romosan
2007-02-22  1:13           ` James Simmons
2007-02-22  9:56             ` Richard Purdie
2007-02-22 14:38               ` Henrique de Moraes Holschuh
2007-02-22  4:03         ` Alex Romosan
2007-02-22  4:58         ` Alex Romosan

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