From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Bish, Jim" Subject: Re: Critical regression in 4.7-rcX Date: Fri, 15 Jul 2016 16:36:48 +0000 Message-ID: <1468600589.8910.6.camel@intel.com> References: <4f3efccf-5d73-d69f-5d79-2107537a8815@lwfinger.net> <20160715144330.GI4329@intel.com> <9d76da4f-6b5b-9bfc-e3c5-475422696a5f@lwfinger.net> Reply-To: "Bish, Jim" Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 5FD3F6EA58 for ; Fri, 15 Jul 2016 16:36:50 +0000 (UTC) In-Reply-To: <9d76da4f-6b5b-9bfc-e3c5-475422696a5f@lwfinger.net> Content-Language: en-US Content-ID: <385FCA7CCDDB2946BC744A63AE9A7E15@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: "ville.syrjala@linux.intel.com" , "Larry.Finger@lwfinger.net" , "daniel.vetter@ffwll.ch" Cc: "intel-gfx@lists.freedesktop.org" , "Shrivastava, Shubhangi" , "torvalds@linux-foundation.org" , "linux-kernel@vger.kernel.org" List-Id: intel-gfx@lists.freedesktop.org T24gRnJpLCAyMDE2LTA3LTE1IGF0IDEwOjM0IC0wNTAwLCBMYXJyeSBGaW5nZXIgd3JvdGU6DQo+ IE9uIDA3LzE1LzIwMTYgMDk6NDMgQU0sIFZpbGxlIFN5cmrDpGzDpCB3cm90ZToNCj4gPiANCj4g PiBPbiBGcmksIEp1bCAxNSwgMjAxNiBhdCAwNDoyNzoyN1BNICswMjAwLCBEYW5pZWwgVmV0dGVy IHdyb3RlOg0KPiA+ID4gDQo+ID4gPiBPbiBGcmksIEp1bCAxNSwgMjAxNiBhdCA4OjU1IEFNLCBM aW51cyBUb3J2YWxkcw0KPiA+ID4gPHRvcnZhbGRzQGxpbnV4LWZvdW5kYXRpb24ub3JnPiB3cm90 ZToNCj4gPiA+ID4gDQo+ID4gPiA+IE9uIFRodSwgMTQgSnVsIDIwMTYsIExhcnJ5IEZpbmdlciB3 cm90ZToNCj4gPiA+ID4gPiANCj4gPiA+ID4gPiBUbyBhbnlvbmUga2VlcGluZyB0cmFjayBvZiBy ZWdyZXNzaW9ucyBpbiBrZXJuZWwgNC43LCBJIGNhbGwNCj4gPiA+ID4gPiB5b3VyIGF0dGVudGlv biB0bw0KPiA+ID4gPiA+IGh0dHBzOi8vYnVncy5mcmVlZGVza3RvcC5vcmcvc2hvd19idWcuY2dp P2lkPTk2Njc1Lg0KPiA+ID4gPiA+IA0KPiA+ID4gPiA+IFRoaXMgYnVnIGNhdXNlcyBkcml2ZXIg aTkxNSB0byBmYWlsIHRvIGNvbm5lY3QgdG8gdGhlDQo+ID4gPiA+ID4gZGlzcGxheSwgYW5kIHJl c3VsdHMgaW4NCj4gPiA+ID4gPiBhIGJsYW5rIHNjcmVlbiBhcyBzb29uIGFzIHRoZSBrZXJuZWwg aXMgbG9hZGVkLiBUaGUgb25seSB3YXkNCj4gPiA+ID4gPiB0byBvcGVyYXRlIHdpdGgNCj4gPiA+ ID4gPiBrZXJuZWwgNC43IGlzIHRvIGFkZCAibm9tb2Rlc2V0IiB0byB0aGUgY29tbWFuZCBsaW5l LiBUaGUNCj4gPiA+ID4gPiBwcm9ibGVtIHdhcyBiaXNlY3RlZA0KPiA+ID4gPiA+IHRvIGNvbW1p dCBmMjFhMjE5ODNlZjEzYSAoImRybS9pOTE1OiBTcGxpdHRpbmcNCj4gPiA+ID4gPiBpbnRlbF9k cF9kZXRlY3QiKS4NCj4gPiA+ID4gRGFuaWVsPyBKYW5pPyBUaW1lIHRvIHJldmVydD8NCj4gPiA+ IFl1cC4gTWVhbnMgdGhhdCBJJ2xsIGdldCB0byByZXZlcnQgYSBwaWxlIG9mIHBhdGNoZXMgKHBs dXMgZXZlbg0KPiA+ID4gbW9yZQ0KPiA+ID4gaW4gLW5leHQpLCBidXQgdGhhdCdzIHdoYXQgd2Ug Z2V0IGZvciBub3QgaGFuZGxpbmcgcmVncmVzc2lvbnMNCj4gPiA+IHRpbWVseS4NCj4gPiA+IERh dmUgcG9rZWQgbWUgYWJvdXQgdGhlIHNhbWUgYnVnIGFscmVhZHkgdG9vLiBCdXQgd2lsbCB0YWtl IGEgZmV3DQo+ID4gPiBkYXlzDQo+ID4gPiB1bnRpbCB0aGUgcHVsbCBpcyBpbiB5b3VyIGluYm94 IEkgZ3Vlc3MuDQo+ID4gSSBhdHRhY2hlZCBhIG9uZWxpbmVyIHRvIHRoZSBidWcgdG9kYXksIHRo YXQgSSAqdGhpbmsqIHNob3VsZCBmaXgNCj4gPiB0aGUNCj4gPiBwcm9ibGVtLg0KPiBBZnRlciBJ IGNoZWNrZWQgb3V0IHRoZSBwcm9ibGVtIGNvbW1pdCBhbmQgYnVpbHQgdGhhdCBrZXJuZWwgd2l0 aCB0aGUNCj4gb25lLWxpbmXCoA0KPiBwYXRjaCwgdGhlIGRpc3BsYXkgd29ya3M7IGhvd2V2ZXIs IG1haW5saW5lIHN0aWxsIGZhaWxzLiBJIGFtDQo+IGN1cnJlbnRsecKgDQo+IGJpc2VjdGluZyB0 byBmaW5kIHdoYXQgb3RoZXIgY29tbWl0IGZhaWxzLiBBdCBhIG1pbmltdW0sIHdlIHNob3VsZCBi ZQ0KPiBhYmxlIHRvwqANCj4gcmVkdWNlIHRoZSBudW1iZXIgb2YgY29tbWl0cyB0aGF0IG5lZWQg cmV2ZXJ0aW5nLg0KPiANCj4gTGFycnkNCkkgd2FzIHNlZWluZyB0aGUgc2FtZSBpc3N1ZSBMaW51 cyByZXBvcnRlZCBidXQgdmVyeSBzcG9yYWRpY2FsbHkuDQrCoEFzc3VtZWQgaXQgd2FzIGR1ZSB0 byBteSB3aWVyZCBjb25maWd1cmF0aW9uIC0gZURQICsgdXNiIHR5cGUgYyAtPiBNU1QNCmh1YiAt PiBEVkkgS1ZNIC0+IGR1YWwgaGVhZCBIRE1JLiDCoENoZWNrZWQgb3V0IHRoZSBvbmUgbGluZXIg LSB3b3Jrcw0KZm9yIG1lIGJ1dCBJIGd1ZXNzIHRoZXJlIGFyZSBzdGlsbCBvdGhlciBmYWlsdXJl cy4NCg0KSmltDQo+IA0KPiANCj4gDQo+IF9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fDQo+IEludGVsLWdmeCBtYWlsaW5nIGxpc3QNCj4gSW50ZWwtZ2Z4QGxp c3RzLmZyZWVkZXNrdG9wLm9yZw0KPiBodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWls bWFuL2xpc3RpbmZvL2ludGVsLWdmeApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVl ZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5m by9pbnRlbC1nZngK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751727AbcGOQgx (ORCPT ); Fri, 15 Jul 2016 12:36:53 -0400 Received: from mga09.intel.com ([134.134.136.24]:2971 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751380AbcGOQgv (ORCPT ); Fri, 15 Jul 2016 12:36:51 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,368,1464678000"; d="scan'208";a="847022482" From: "Bish, Jim" To: "ville.syrjala@linux.intel.com" , "Larry.Finger@lwfinger.net" , "daniel.vetter@ffwll.ch" CC: "torvalds@linux-foundation.org" , "intel-gfx@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" , "Shrivastava, Shubhangi" Subject: Re: [Intel-gfx] Critical regression in 4.7-rcX Thread-Topic: [Intel-gfx] Critical regression in 4.7-rcX Thread-Index: AQHR3mYF+7qo9DDaiECJkuCTSjGuFqAaApKAgAAEfACAAA41gIAAEVyA Date: Fri, 15 Jul 2016 16:36:48 +0000 Message-ID: <1468600589.8910.6.camel@intel.com> References: <4f3efccf-5d73-d69f-5d79-2107537a8815@lwfinger.net> <20160715144330.GI4329@intel.com> <9d76da4f-6b5b-9bfc-e3c5-475422696a5f@lwfinger.net> In-Reply-To: <9d76da4f-6b5b-9bfc-e3c5-475422696a5f@lwfinger.net> Reply-To: "Bish, Jim" Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.19.168.11] Content-Type: text/plain; charset="utf-8" Content-ID: <385FCA7CCDDB2946BC744A63AE9A7E15@intel.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id u6FGavFU019409 On Fri, 2016-07-15 at 10:34 -0500, Larry Finger wrote: > On 07/15/2016 09:43 AM, Ville Syrjälä wrote: > > > > On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote: > > > > > > On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds > > > wrote: > > > > > > > > On Thu, 14 Jul 2016, Larry Finger wrote: > > > > > > > > > > To anyone keeping track of regressions in kernel 4.7, I call > > > > > your attention to > > > > > https://bugs.freedesktop.org/show_bug.cgi?id=96675. > > > > > > > > > > This bug causes driver i915 to fail to connect to the > > > > > display, and results in > > > > > a blank screen as soon as the kernel is loaded. The only way > > > > > to operate with > > > > > kernel 4.7 is to add "nomodeset" to the command line. The > > > > > problem was bisected > > > > > to commit f21a21983ef13a ("drm/i915: Splitting > > > > > intel_dp_detect"). > > > > Daniel? Jani? Time to revert? > > > Yup. Means that I'll get to revert a pile of patches (plus even > > > more > > > in -next), but that's what we get for not handling regressions > > > timely. > > > Dave poked me about the same bug already too. But will take a few > > > days > > > until the pull is in your inbox I guess. > > I attached a oneliner to the bug today, that I *think* should fix > > the > > problem. > After I checked out the problem commit and built that kernel with the > one-line  > patch, the display works; however, mainline still fails. I am > currently  > bisecting to find what other commit fails. At a minimum, we should be > able to  > reduce the number of commits that need reverting. > > Larry I was seeing the same issue Linus reported but very sporadically.  Assumed it was due to my wierd configuration - eDP + usb type c -> MST hub -> DVI KVM -> dual head HDMI.  Checked out the one liner - works for me but I guess there are still other failures. Jim > > > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx