From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754841AbZBPJGI (ORCPT ); Mon, 16 Feb 2009 04:06:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751451AbZBPJFw (ORCPT ); Mon, 16 Feb 2009 04:05:52 -0500 Received: from mga02.intel.com ([134.134.136.20]:60552 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029AbZBPJFv (ORCPT ); Mon, 16 Feb 2009 04:05:51 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.38,215,1233561600"; d="scan'208";a="387137392" Subject: Re: X200: Brightness broken since 2.6.29-rc4-58-g4c098bc From: ZhangRui To: Len Brown Cc: Ingo Molnar , Nico Schottelius , LKML , Matthew Garrett , "Rafael J. Wysocki" , Andrew Morton , "linux-acpi@vger.kernel.org" In-Reply-To: References: <20090213093354.GA10175@denkbrett.schottelius.org> <20090213094200.GC17774@elte.hu> Content-Type: text/plain Date: Mon, 16 Feb 2009 17:06:59 +0800 Message-Id: <1234775219.4998.1.camel@rzhang-desktop> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi, Nico, do you have an external graphics card as well as the integrated intel graphics on your laptops? please attach the dmesg and lspci output. thanks, rui On Sat, 2009-02-14 at 02:05 +0800, Len Brown wrote: > > > When using > > > - vmlinuz-2.6.29-rc4-ikn-00058-g4c098bc or > > > - vmlinuz-2.6.29-rc4-ikn-00211-g37bed90 > > > > > > the brightness of the LCD is almost off (lowest level), > > > although kernel reports otherwise: > > > > > > [10:31] ikn:~% cat /proc/acpi/video/VID/LCD0/brightness > > > levels: 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 100 > > > current: 100 > > > > > > Changing the brightness via echo 20 > /proc/acpi/video/VID/LCD0/brightness > > > only changes the value displayed, the display always keeps the same > > > brightness. > > > > > > The last time I saw it working was vmlinuz-2.6.29-rc4-ikn-00001-gd5b5623. > > Nico, > there are not a lot of changes between rc4 and the breakage, > (and none of them jump out at me) can you git-bisect? > > thanks, > Len Brown, Intel Open Source Technology Center > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html