From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: Re: Skylake graphics regression: projector failure with 4.8-rc3 Date: Mon, 19 Sep 2016 12:27:10 -0700 Message-ID: <1474313230.2398.30.camel@HansenPartnership.com> References: <1472217035.5189.50.camel@HansenPartnership.com> <1472667806.2316.42.camel@HansenPartnership.com> <1472679836.2316.65.camel@HansenPartnership.com> <1472680290.2387.219.camel@intel.com> <1472682357.2280.3.camel@HansenPartnership.com> <1474297777.2426.9.camel@HansenPartnership.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1474297777.2426.9.camel@HansenPartnership.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Thorsten Leemhuis , "Zanoni, Paulo R" , "dri-devel@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" Cc: "linux-kernel@vger.kernel.org" List-Id: dri-devel@lists.freedesktop.org T24gTW9uLCAyMDE2LTA5LTE5IGF0IDA4OjA5IC0wNzAwLCBKYW1lcyBCb3R0b21sZXkgd3JvdGU6 Cj4gT24gU3VuLCAyMDE2LTA5LTE4IGF0IDEzOjM1ICswMjAwLCBUaG9yc3RlbiBMZWVtaHVpcyB3 cm90ZToKPiA+IEhpISBKYW1lcyAmIFBhdWxvOiBXaGF0J3MgdGhlIGN1cnJlbnQgc3RhdHVzIG9m IHRoaXM/Cj4gCj4gTm8sIHRoZSBvbmx5IGludGVyYWN0aW9uIGhhcyBiZWVuIHRoZSBzdWdnZXN0 aW9uIGJlbG93IGZvciBhIHJldmVydCwKPiB3aGljaCBkaWRuJ3QgZml4IHRoZSBwcm9ibGVtLgo+ IAo+ID4gIFdhcyB0aGlzIGlzc3VlIGRpc2N1c3NlZCBlbHNld2hlcmUgb3IgZXZlbiBmaXhlZCBp biBiZXR3ZWVuPyBKdXN0IAo+ID4gYXNraW5nLCBiZWNhdXNlIHRoaXMgaXNzdWUgaXMgb24gdGhl IGxpc3Qgb2YgcmVncmVzc2lvbnMgZm9yIDQuOC4KPiAKPiAKPiBJJ20ganVzdCBhYm91dCB0byB0 cnkgb3V0IC1yYzcsIGJ1dCBpdCdzIG5vdCBmaXhlZCBzbyBmYXIuCgpPSywgd2l0aCAtcmM3IGFu ZCB0aGUgaTkxNSBmaXhlcywgdGhlcmUgc2VlbXMgdG8gYmUgYSBtYXJrZWQKaW1wcm92ZW1lbnQu ICBJIGNhbiBubyBsb25nZXIgY3Jhc2ggdGhlIGNydGMgYnkgdXNpbmcgbG90cyBvZiB4cmFuZHIK c3dpdGNoZXMsIHdoaWNoIHdhcyB0aGUgcHJpbmNpcGFsIHByb2JsZW0uCgpJJ3ZlIHNvIGZhciBv bmx5IGdvdCBvbmUgb2YgdGhlc2UgaW4gdGhlIGxvZ3MKClsxNDg1OC42MzUwMzVdIFtkcm06aW50 ZWxfY3B1X2ZpZm9fdW5kZXJydW5faXJxX2hhbmRsZXIgW2k5MTVdXSAqRVJST1IqCkNQVSBwaXBl IEIgRklGTyB1bmRlcnJ1bgoKQW5kIHRoZSBvbmx5IHJlc2lkdWFsIHByb2JsZW0gc2VlbXMgdG8g YmUgdGhhdCB0aGUgbW9uaXRvciBnb2VzIGJsYW5rCnBlcmlvZGljYWxseSwgYnV0IHRoaXMgY2Fu IGJlIGZpeGVkIGJ5IHN3aXRjaGluZyByZXNvbHV0aW9uIGEgY291cGxlIG9mCnRpbWVzLgoKSSBo YXZlbid0IHNlZW4gYW55IG9mIHRoZSBsaW5rIHRyYWluaW5nIGVycm9ycyBzbyBmYXIgYW5kIEkn dmUgcnVuCnRocm91Z2ggbXkgdXN1YWwgYmF0dGVyeSBvZiBiZSBuYXN0eSB0byB0aGUgZXh0ZXJu YWwgbW9uaXRvciB0ZXN0cy4KCkphbWVzCgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3Rz LmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2ludGVsLWdmeAo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753171AbcIST1V (ORCPT ); Mon, 19 Sep 2016 15:27:21 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:50556 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752835AbcIST1T (ORCPT ); Mon, 19 Sep 2016 15:27:19 -0400 Message-ID: <1474313230.2398.30.camel@HansenPartnership.com> Subject: Re: [Intel-gfx] Skylake graphics regression: projector failure with 4.8-rc3 From: James Bottomley To: Thorsten Leemhuis , "Zanoni, Paulo R" , "dri-devel@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" Cc: "linux-kernel@vger.kernel.org" Date: Mon, 19 Sep 2016 12:27:10 -0700 In-Reply-To: <1474297777.2426.9.camel@HansenPartnership.com> References: <1472217035.5189.50.camel@HansenPartnership.com> <1472667806.2316.42.camel@HansenPartnership.com> <1472679836.2316.65.camel@HansenPartnership.com> <1472680290.2387.219.camel@intel.com> <1472682357.2280.3.camel@HansenPartnership.com> <1474297777.2426.9.camel@HansenPartnership.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.16.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2016-09-19 at 08:09 -0700, James Bottomley wrote: > On Sun, 2016-09-18 at 13:35 +0200, Thorsten Leemhuis wrote: > > Hi! James & Paulo: What's the current status of this? > > No, the only interaction has been the suggestion below for a revert, > which didn't fix the problem. > > > Was this issue discussed elsewhere or even fixed in between? Just > > asking, because this issue is on the list of regressions for 4.8. > > > I'm just about to try out -rc7, but it's not fixed so far. OK, with -rc7 and the i915 fixes, there seems to be a marked improvement. I can no longer crash the crtc by using lots of xrandr switches, which was the principal problem. I've so far only got one of these in the logs [14858.635035] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun And the only residual problem seems to be that the monitor goes blank periodically, but this can be fixed by switching resolution a couple of times. I haven't seen any of the link training errors so far and I've run through my usual battery of be nasty to the external monitor tests. James