From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Lu Subject: Re: i915 backlight Date: Fri, 02 Aug 2013 14:36:35 +0800 Message-ID: <51FB5373.9040307@intel.com> References: <20130731162252.GC4724@pd.tnic> <20130731163623.GD4724@pd.tnic> <1419236.138PcnXVBh@vostro.rjw.lan> <20130801080724.GA3448@nazgul.tnic> <51FB4B0A.7060706@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:37704 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754448Ab3HBGfs (ORCPT ); Fri, 2 Aug 2013 02:35:48 -0400 In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Josep Lladonosa Cc: Borislav Petkov , "Rafael J. Wysocki" , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, lkml , ACPI Devel Maling List On 08/02/2013 02:25 PM, Josep Lladonosa wrote: > Hello, > > I am using a Lenovo Edge E530 and, with kernel 3.11.0-rc3, I had to > change to this parameter to the kernel boot: > > > GRUB_CMDLINE_LINUX="acpi_osi=\"!Windows 2012\"" What if you remove the above from kernel command line, and add video.brightness_switch_enabled=0 to kernel command line, then set the following in xorg.conf: $ cat /etc/X11/xorg.conf Section "Device" Option "Backlight" "intel_backlight" Identifier "Card0" Driver "intel" BusID "PCI:0:2:0" EndSection Does everything work? If not, please test if manually change brightness level through sysfs works: # cd /sys/calss/backlight/intel_backlight # echo xxx > brightness And also test if hotkey event is sent out or not by running acpi_listen and then press the hotkey. Thanks, Aaron > > > instead of previous > > GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor" > > to be able to change brightness. In some kernel versions before, it > worked, but with 15 levels, but in graphical system brightness bar was > not moving. > > > Now I have, though, 8 possible values for brightness and brightness > bar shows its correct position. > > Josep > > On 2 August 2013 08:00, Aaron Lu wrote: >> On 08/01/2013 04:07 PM, Borislav Petkov wrote: >>> On Wed, Jul 31, 2013 at 11:16:52PM +0200, Rafael J. Wysocki wrote: >>>> Does reverting efaa14c help? >>> >>> Nope. >>> >>> But see my other reply to Aaron. >> >> Assume you have specified to use intel_backlight in xorg.conf, does >> booting with video.brightness_switch_enabled=0 help? >> >> Thanks, >> Aaron >> -- >> 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/ > > >