From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seth Forshee Subject: Re: [PATCH] ACPI: Disable Windows 8 compatibility for some Lenovo ThinkPads Date: Wed, 13 Feb 2013 15:49:14 -0600 Message-ID: <20130213214914.GH22867@thinkpad-t410> References: <1360599681-24781-1-git-send-email-seth.forshee@canonical.com> <20130211175213.GA25139@srcf.ucam.org> <20130211190617.GH13768@thinkpad-t410> <20130211190914.GA27364@srcf.ucam.org> <20130213203228.GE22867@thinkpad-t410> <20130213205558.GA16559@srcf.ucam.org> <511BFFCD.5050008@bjencks.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from youngberry.canonical.com ([91.189.89.112]:56859 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760868Ab3BMVtT (ORCPT ); Wed, 13 Feb 2013 16:49:19 -0500 Content-Disposition: inline In-Reply-To: <511BFFCD.5050008@bjencks.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Ben Jencks Cc: Matthew Garrett , Len Brown , "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, joeyli On Wed, Feb 13, 2013 at 04:04:13PM -0500, Ben Jencks wrote: > >> The other issue with using the cached value is that the hotkeys on these > >> machines are still going to end up cycling through 101 brightness levels > >> with 85% of them leaving the brightness unchanged. When there's that > >> many levels though maybe it makes sense to jump more than one level at a > >> time. > > > > Right. I'd recommend turning off that functionality and just leaving it > > up to userspace. We still seem to be carrying a patch to do that in > > Fedora. I thought I had a patch to make this a config option somewhere, > > but can't find any sign of it now... > > I think you're looking for video.brightness_switch_enabled=0, which I > have to use, otherwise a single keypress changes brightness by two levels. I think that option does what Matthew's suggesting. It would be a simple change to default it to 0.