From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753911AbbJGTEn (ORCPT ); Wed, 7 Oct 2015 15:04:43 -0400 Received: from mga02.intel.com ([134.134.136.20]:24695 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751444AbbJGTEm (ORCPT ); Wed, 7 Oct 2015 15:04:42 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,650,1437462000"; d="scan'208";a="821560726" Date: Wed, 7 Oct 2015 22:04:27 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: Nick Bowler Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: Re: PROBLEM: Intel VGA output busticated on 4.3-rc2 (regression) Message-ID: <20151007190427.GQ26517@intel.com> References: <20151007115850.GE26517@intel.com> <20151007153202.GN26517@intel.com> 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 On Wed, Oct 07, 2015 at 02:50:34PM -0400, Nick Bowler wrote: > On 10/7/15, Ville Syrjälä wrote: > > On Wed, Oct 07, 2015 at 10:29:22AM -0400, Nick Bowler wrote: > >> On 10/7/15, Ville Syrjälä wrote: > >> > On Tue, Oct 06, 2015 at 11:42:33AM -0400, Nick Bowler wrote: > >> >> On 9/24/15, Nick Bowler wrote: > >> >> > Testing out 4.3-rc2, first thing I notice is that the VGA output is > >> >> > not working. Specifically, the display is continuously powering on > >> >> > and off -- at no point is any image visible on the screen (I am > >> >> > expecting to see the console output). The display connected to the > >> >> > HDMI output is working fine. > >> [...] > > I've attached two potential patches that might help. Can you give a try > > to just patch 1, and if that alone doesn't help then both patches > > together? > > Patch #1: no change. > Patch #1+#2: this works. Cool. I can see similar effects when manually frobbing the register on my 946GZ, except somehow it still manages to work without these patches. Not quite sure why that is. But anyway, I'll polish the patches a bit and send them out. -- Ville Syrjälä Intel OTC