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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.


WARNING: multiple messages have this Message-ID (diff)
From: James Simmons <jsimmons@infradead.org>
To: Joel Becker <Joel.Becker@oracle.com>
Cc: linux-fbdev-devel@lists.sourceforge.net,
	Andrew Morton <akpm@linux-foundation.org>,
	Richard Purdie <rpurdie@rpsys.net>,
	linux-kernel@vger.kernel.org,
	Yaroslav Halchenko <lists@onerussian.com>
Subject: Re: 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.


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

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