From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: PROBLEM: Intel VGA output busticated on 4.3-rc2 (regression) Date: Wed, 7 Oct 2015 22:04:27 +0300 Message-ID: <20151007190427.GQ26517@intel.com> References: <20151007115850.GE26517@intel.com> <20151007153202.GN26517@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Nick Bowler Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org T24gV2VkLCBPY3QgMDcsIDIwMTUgYXQgMDI6NTA6MzRQTSAtMDQwMCwgTmljayBCb3dsZXIgd3Jv dGU6Cj4gT24gMTAvNy8xNSwgVmlsbGUgU3lyasOkbMOkIDx2aWxsZS5zeXJqYWxhQGxpbnV4Lmlu dGVsLmNvbT4gd3JvdGU6Cj4gPiBPbiBXZWQsIE9jdCAwNywgMjAxNSBhdCAxMDoyOToyMkFNIC0w NDAwLCBOaWNrIEJvd2xlciB3cm90ZToKPiA+PiBPbiAxMC83LzE1LCBWaWxsZSBTeXJqw6Rsw6Qg PHZpbGxlLnN5cmphbGFAbGludXguaW50ZWwuY29tPiB3cm90ZToKPiA+PiA+IE9uIFR1ZSwgT2N0 IDA2LCAyMDE1IGF0IDExOjQyOjMzQU0gLTA0MDAsIE5pY2sgQm93bGVyIHdyb3RlOgo+ID4+ID4+ IE9uIDkvMjQvMTUsIE5pY2sgQm93bGVyIDxuYm93bGVyQGRyYWNvbnguY2E+IHdyb3RlOgo+ID4+ ID4+ID4gVGVzdGluZyBvdXQgNC4zLXJjMiwgZmlyc3QgdGhpbmcgSSBub3RpY2UgaXMgdGhhdCB0 aGUgVkdBIG91dHB1dCBpcwo+ID4+ID4+ID4gbm90IHdvcmtpbmcuICBTcGVjaWZpY2FsbHksIHRo ZSBkaXNwbGF5IGlzIGNvbnRpbnVvdXNseSBwb3dlcmluZyBvbgo+ID4+ID4+ID4gYW5kIG9mZiAt LSBhdCBubyBwb2ludCBpcyBhbnkgaW1hZ2UgdmlzaWJsZSBvbiB0aGUgc2NyZWVuIChJIGFtCj4g Pj4gPj4gPiBleHBlY3RpbmcgdG8gc2VlIHRoZSBjb25zb2xlIG91dHB1dCkuICBUaGUgZGlzcGxh eSBjb25uZWN0ZWQgdG8gdGhlCj4gPj4gPj4gPiBIRE1JIG91dHB1dCBpcyB3b3JraW5nIGZpbmUu Cj4gPj4gWy4uLl0KPiA+IEkndmUgYXR0YWNoZWQgdHdvIHBvdGVudGlhbCBwYXRjaGVzIHRoYXQg bWlnaHQgaGVscC4gQ2FuIHlvdSBnaXZlIGEgdHJ5Cj4gPiB0byBqdXN0IHBhdGNoIDEsIGFuZCBp ZiB0aGF0IGFsb25lIGRvZXNuJ3QgaGVscCB0aGVuIGJvdGggcGF0Y2hlcwo+ID4gdG9nZXRoZXI/ Cj4gCj4gUGF0Y2ggIzE6IG5vIGNoYW5nZS4KPiBQYXRjaCAjMSsjMjogdGhpcyB3b3Jrcy4KCkNv b2wuIEkgY2FuIHNlZSBzaW1pbGFyIGVmZmVjdHMgd2hlbiBtYW51YWxseSBmcm9iYmluZyB0aGUg cmVnaXN0ZXIgb24KbXkgOTQ2R1osIGV4Y2VwdCBzb21laG93IGl0IHN0aWxsIG1hbmFnZXMgdG8g d29yayB3aXRob3V0IHRoZXNlCnBhdGNoZXMuIE5vdCBxdWl0ZSBzdXJlIHdoeSB0aGF0IGlzLgoK QnV0IGFueXdheSwgSSdsbCBwb2xpc2ggdGhlIHBhdGNoZXMgYSBiaXQgYW5kIHNlbmQgdGhlbSBv dXQuCgotLSAKVmlsbGUgU3lyasOkbMOkCkludGVsIE9UQwpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZl bEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWls bWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo= 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