From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751946Ab2LTJeF (ORCPT ); Thu, 20 Dec 2012 04:34:05 -0500 Received: from mail-wg0-f47.google.com ([74.125.82.47]:58638 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751292Ab2LTJd5 convert rfc822-to-8bit (ORCPT ); Thu, 20 Dec 2012 04:33:57 -0500 X-Greylist: delayed 352 seconds by postgrey-1.27 at vger.kernel.org; Thu, 20 Dec 2012 04:33:56 EST From: Fabio Coatti To: Tom St Denis , linux-kernel@vger.kernel.org Subject: Re: 3.7.X vs 3.6.11 HP Folio 9470m brightness regression? Date: Thu, 20 Dec 2012 10:27:57 +0100 Message-ID: <1425298.zMcaSB7taE@calvin> User-Agent: KMail/4.9.4 (Linux/3.7.1; KDE/4.9.4; x86_64; ; ) In-Reply-To: <1520620637.200975.1355955029721.JavaMail.root@elliptictech.com> References: <1520620637.200975.1355955029721.JavaMail.root@elliptictech.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In data mercoledì 19 dicembre 2012 17:10:29, hai scritto: > ----- Original Message ----- > > > From: "Fabio Coatti" > > To: linux-kernel@vger.kernel.org > > Sent: Wednesday, 19 December, 2012 5:01:30 PM > > Subject: 3.7.X vs 3.6.11 HP Folio 9470m brightness regression? > > > > Hi, > > I'm testing kernels 3.7.X vs 3.6.11 on an HP Folio 9470m machine, > > i915 > > driver for a VGA compatible controller: Intel Corporation 3rd Gen > > Core > > processor Graphics Controller (rev 09) 8086:0166 > > > > With 3.6.11, the brightness can be correctly set using fn+f9/10: kde > > shows the bar and brightness changes. > > > > With 3.7.1 kde shows the percentage bar and > > /sys/class/backlight/acpi_video0/brightness is updated, but the > > screen > > brightness does not changes. > > I had a similar problem with my Dell laptop and i915/acpi... > > Is there another acpi_video? device? In my case two showed up in 3.7 > whereas in 3.6 there was one. In 3.7 it was controlling the wrong one > apparently. Well, this seems not to be the case, I have only one acpi_video: calvin ~ # ls -l /sys/class/backlight/ totale 0 lrwxrwxrwx 1 root root 0 20 dic 09.20 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 calvin ~ # ls -l /sys/devices/pci0000:00/0000:00:02.0/backlight totale 0 drwxr-xr-x 3 root root 0 20 dic 09.20 acpi_video0 -- Fabio