From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965145AbbJVJhD (ORCPT ); Thu, 22 Oct 2015 05:37:03 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:54860 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964941AbbJVJg6 (ORCPT ); Thu, 22 Oct 2015 05:36:58 -0400 Date: Thu, 22 Oct 2015 11:36:52 +0200 From: Darren Hart To: Bruno =?iso-8859-1?Q?Pr=E9mont?= Cc: platform-driver-x86@vger.kernel.org, Linux Kernel Mailing List , Petri Hodju , Bjorn Helgaas Subject: Re: [Bug 105051] Radeon sets max_brightness to -1, breaking GNOME backlight control on Macbook Pro mid-2015 11,5 Message-ID: <20151022093652.GA25192@malice.jf.intel.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Bruno, can you please have a look at the following regression attributed to: 4eebd5a apple-gmux: lock iGP IO to protect from vgaarb changes 2015-03-18 (7 months ago), Bruno Prémont On Thu, Oct 15, 2015 at 04:47:13AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=105051 > > Felipe Ortiz changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > CC| |fortizc@gmail.com > > --- Comment #14 from Felipe Ortiz --- > I can confirm the problem with 4eebd5a4e72697aac25a8a57d3f888a9d5f80370. I have > a MPB 11,5 with AMD/Intel graphics. I recompile the module (a previous version > of 4eebd5a4e72697aac25a8a57d3f888a9d5f80370) and brightness adjusts is working > again. > > I see two problems: > > 1) If someone uses gpu-switch (https://github.com/0xbb/gpu-switch) with this > bug screen seem not work, after severals reboots (with different kernels) I can > access a terminal and execute gpu-switch -d and then screen seems work again. > > 2) If you use a Intel card (swiched with gpu-switch) the OSD (activated with > functions keys) is so slow and chromium have the same problem (temporary fix is > deactivate chromium hw acceleration) is this a intel driver bug? > > -- > You are receiving this mail because: > You are on the CC list for the bug. > Thanks, -- Darren Hart Intel Open Source Technology Center