From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753642Ab2DBRxY (ORCPT ); Mon, 2 Apr 2012 13:53:24 -0400 Received: from mail-we0-f174.google.com ([74.125.82.174]:54716 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752391Ab2DBRxX (ORCPT ); Mon, 2 Apr 2012 13:53:23 -0400 Date: Mon, 2 Apr 2012 19:54:02 +0200 From: Daniel Vetter To: Maciej Rutecki Cc: Linux Kernel Mailing List , dri-devel@lists.freedesktop.org, "Rafael J. Wysocki" Subject: Re: [3.4-rc1][Regression][intel] Resume from suspend to disk hangs on restoring backlight state Message-ID: <20120402175402.GA5260@phenom.ffwll.local> Mail-Followup-To: Maciej Rutecki , Linux Kernel Mailing List , dri-devel@lists.freedesktop.org, "Rafael J. Wysocki" References: <201204021939.39603.maciej.rutecki@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201204021939.39603.maciej.rutecki@gmail.com> X-Operating-System: Linux phenom 3.2.0-1-amd64 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 02, 2012 at 07:39:39PM +0200, Maciej Rutecki wrote: > Last known good: 3.3 > Bad kernel: 3.4-rc1 > Subsystem: power management/suspend/dri(intel) > > When I resume from suspend to disk then system hangs on this screen: > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/DSC_5479.jpg > > It does not help SysRq keys. Only I can force power off by hold power button. > > Dmesg: > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/dmesg-3.4-rc1.txt > > Config: > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/config-3.4.0-rc1 Likely a known regression, ppgtt support broke hibernate because my code doesn't restore the ppgtt page directory correctly in the thaw function. Patch: http://cgit.freedesktop.org/~danvet/drm-intel/commit/?h=drm-intel-fixes&id=55a254ac63a3ac1867d1501030e7fba69c7d4aeb Please test whether this fixes your issue. You can also try adding i915.i915_enable_ppgtt=0 to your kernel cmdline. Thanks, Daniel -- Daniel Vetter Mail: daniel@ffwll.ch Mobile: +41 (0)79 365 57 48