From mboxrd@z Thu Jan 1 00:00:00 1970 From: klug Subject: Re: Fw: Re: [Linux-fbdev-devel] Fw: [Bugme-new] [Bug 4468] New: Upgrade to 2.6.11.6 results in no longer being able to turn the lcd backlight off. Date: Thu, 26 May 2005 20:04:43 -0400 Message-ID: <4296641B.2050106@blarg.org> References: <20050525223709.17f8c725.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20050525223709.17f8c725.akpm-3NddpPZAyC0@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Cc: akpm-3NddpPZAyC0@public.gmane.org List-Id: linux-acpi@vger.kernel.org With a little tinkering I discovered that, at least in my case, setting both config_acpi_video=y and config_acpi_toshiba=y seems to build a conflict. With the hardware I was able to test, toshiba satellite 5005-S504 & 5005-S507, not setting config_acpi_video=y fixed the backlight problem I was having with 2.6.10->current. I tested 2.6.10, 2.6.11.0->10, and 2.6.12-rc1->5 all with success. Andrew Morton wrote: > hm, we seem to have several reports of Tochiba backlight failures. > > Is anything likely to get fixed here? It _used_ to work, but then > we broke it. > > > > Begin forwarded message: > > Date: Thu, 14 Apr 2005 13:51:25 +0800 > From: "Antonino A. Daplas" > To: linux-fbdev-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Andrew Morton > Cc: klug-90T4dkFmkpLYtjvyW6yDsg@public.gmane.org > Subject: Re: [Linux-fbdev-devel] Fw: [Bugme-new] [Bug 4468] New: Upgrade to 2.6.11.6 results in no longer being able to turn the lcd backlight off. > > > On Monday 11 April 2005 08:28, Andrew Morton wrote: > > >>Previous to my 2.6.11.6 upgrade I was running 2.6.9. With all unpatched 2.6 >>kernel versions up to and including 2.6.9, I could turn the lcd backlight >>off by running "echo lcd_out:0 > /proc/acpi/toshiba/video" as root. I >>upgraded directly from 2.6.9 to 2.6.11.6. With the upgrade I am no longer >>able to turn the lcd backlight off. There is no effect after running "echo >>lcd_out:0 > >>/proc/acpi/toshiba/video" and the /proc/acpi/toshiba/video lcd_out option > > > Looks more like an acpi problem than fbdev/backlight. > > >>remains unchanged as 1. I recompiled the 2.6.11.6 kernel with the new >>option CONFIG_BACKLIGHT_LCD_SUPPORT=y. Enabling this option did not allow > > > Does not matter as intelfb does not use the backlight/lcd architecture yet. > > Tony > ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005