Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965137AbXBVEEs (ORCPT ); Wed, 21 Feb 2007 23:04:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965238AbXBVEEr (ORCPT ); Wed, 21 Feb 2007 23:04:47 -0500 Received: from sycorax.lbl.gov ([128.3.11.121]:2583 "EHLO sycorax.lbl.gov" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965137AbXBVEEr (ORCPT ); Wed, 21 Feb 2007 23:04:47 -0500 From: Alex Romosan To: Richard Purdie Cc: Yaroslav Halchenko , Andrew Morton , linux-kernel@vger.kernel.org, linux-fbdev-devel@lists.sourceforge.net, James Simmons Subject: Re: no backlight on radeon after recent kernel "upgrade"s References: <20070219044616.GC25659@washoe.onerussian.com> <20070219000412.acad13de.akpm@linux-foundation.org> <1171876788.6046.3.camel@localhost.localdomain> <877iub9mu2.fsf@sycorax.lbl.gov> <1172097718.5790.29.camel@localhost.localdomain> Date: Wed, 21 Feb 2007 20:03:57 -0800 In-Reply-To: <1172097718.5790.29.camel@localhost.localdomain> (message from Richard Purdie on Wed, 21 Feb 2007 22:41:57 +0000) Message-ID: <877iuaalea.fsf@sycorax.lbl.gov> User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2728 Lines: 95 Richard Purdie writes: > Can you have a look at the differences between the defconfigs for > 2.6.20 and 2.6.21-rc1? this is probably the relevant part: --- config-2.6.20 2007-02-04 12:09:28.000000000 -0800 +++ config-2.6.21-rc1 2007-02-21 08:37:53.000000000 -0800 @@ -1270,16 +1302,25 @@ # # Graphics support # -CONFIG_FIRMWARE_EDID=y +CONFIG_BACKLIGHT_LCD_SUPPORT=y +CONFIG_BACKLIGHT_CLASS_DEVICE=y +CONFIG_LCD_CLASS_DEVICE=y +# CONFIG_BACKLIGHT_PROGEAR is not set CONFIG_FB=y +CONFIG_FIRMWARE_EDID=y CONFIG_FB_DDC=y CONFIG_FB_CFB_FILLRECT=y CONFIG_FB_CFB_COPYAREA=y CONFIG_FB_CFB_IMAGEBLIT=y +# CONFIG_FB_SVGALIB is not set # CONFIG_FB_MACMODES is not set -# CONFIG_FB_BACKLIGHT is not set +CONFIG_FB_BACKLIGHT=y CONFIG_FB_MODE_HELPERS=y CONFIG_FB_TILEBLITTING=y + +# +# Frambuffer hardware drivers +# # CONFIG_FB_CIRRUS is not set # CONFIG_FB_PM2 is not set # CONFIG_FB_CYBER2000 is not set @@ -1297,9 +1338,11 @@ # CONFIG_FB_MATROX is not set CONFIG_FB_RADEON=y CONFIG_FB_RADEON_I2C=y +CONFIG_FB_RADEON_BACKLIGHT=y # CONFIG_FB_RADEON_DEBUG is not set # CONFIG_FB_ATY128 is not set # CONFIG_FB_ATY is not set +# CONFIG_FB_S3 is not set # CONFIG_FB_SAVAGE is not set # CONFIG_FB_SIS is not set # CONFIG_FB_NEOMAGIC is not set @@ -1333,11 +1376,6 @@ # CONFIG_LOGO_LINUX_MONO is not set # CONFIG_LOGO_LINUX_VGA16 is not set CONFIG_LOGO_LINUX_CLUT224=y -CONFIG_BACKLIGHT_LCD_SUPPORT=y -CONFIG_BACKLIGHT_CLASS_DEVICE=y -CONFIG_BACKLIGHT_DEVICE=y -CONFIG_LCD_CLASS_DEVICE=m -CONFIG_LCD_DEVICE=y # # Sound > If the backlight changes are at fault, I'm guessing James' Kconfig > changes to the video Kconfig would be the culprit since > FB_RADEON_BACKLIGHT only used to be selectable if PMAC_BACKLIGHT was > enabled. On a thinkpad, the backlight is probably under ACPI > control. there was no FB_RADEON_BACKLIGHT in 2.6.20 and CONFIG_FB_BACKLIGHT wasn't set. > If FB_RADEON_BACKLIGHT wasn't set for 2.6.20, can you try 2.6.21-rc1 > with that option disabled? i'll try recompiling without this option and let you know what happened. > An ls /sys/class/backlight under 2.6.20 will tell us which driver it > was using... ls /sys/class/backlight/ 0 ./ 0 ../ 0 ibm/ --alex-- -- | I believe the moment is at hand when, by a paranoiac and active | | advance of the mind, it will be possible (simultaneously with | | automatism and other passive states) to systematize confusion | | and thus to help to discredit completely the world of reality. | - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/