From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758877Ab3BSSIM (ORCPT ); Tue, 19 Feb 2013 13:08:12 -0500 Received: from oproxy9.bluehost.com ([69.89.24.6]:35247 "HELO oproxy9.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1758727Ab3BSSIL (ORCPT ); Tue, 19 Feb 2013 13:08:11 -0500 Date: Tue, 19 Feb 2013 10:08:49 -0800 From: Jesse Barnes To: Chris Li Cc: linux-kernel@vger.kernel.org, robert.moore@intel.com, feng.tang@intel.com, len.brown@intel.com, daniel.vetter@ffwll.ch Subject: Re: i915 black screen introduced by ACPI changes Message-ID: <20130219100849.72d2330b@jbarnes-desktop> In-Reply-To: References: X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.161.37.189 authed with jbarnes@virtuousgeek.org} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 17 Feb 2013 20:43:47 -0800 Chris Li wrote: > My Lenovo Y580 laptop with FC18 start to get black screen after the kernel > upgrade to 3.7.xxx > > The black screen happens about the time kernel switch to using VT console. > At the point of black screen, no response of cap locks key led no network > connection. The machine seems dead. Can you set up netconsole and see if you can get any output from the boot, if we're lucky maybe you'll see a panic... > The CPU is i7 and it has two video card. The Intel build-in video card > and Gtx 660M Nvidia card. > > This is very annoying. I did some poking around it: > - It was fine on the FC18 3.6.xxx kernel before the upgrade. > - The black screen exists with FC18 3.7.xxx kernel > - The black screen also exists in latest tip of linux-2.6. > - Switch to multi-user mode booting does not get rid of the black screen. > - Get rid of the "rhrb quit" does not help either. > - When the black screen happen, cap lock LED does not response to cap locks. > - No networking when black screen happen. The only thing to do is > reboot the system. > - Adding "i915.modeset=0" will allow the kernel to boot into GUI login. However, > logout of X will cause the machine to hang similar to the black screen. > - Suspend and resume will get stuck at the black screen with"i915.modeset=0". > - Kernel console and X is using the Intel driver for display. I don't know about the ACPI change mentioned, but ACPI is involved in dual-GPU configurations. Maybe the change affected the default behavior and pointed more functions at the nVidia device rather than the Intel? -- Jesse Barnes, Intel Open Source Technology Center