From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sudip Mukherjee Subject: Re: [BUG/REGRESSION] Screen flickering Date: Wed, 13 May 2015 16:58:59 +0530 Message-ID: <20150513112859.GA8887@sudip-PC> References: <87pp65efmo.fsf@hank.tgummerer.com> <87iobw3klc.fsf@intel.com> <20150513095319.GA4249@jannic.reliablesolutions.de> <20150513103224.GA8470@sudip-PC> <20150513111010.GA7009@jannic.reliablesolutions.de> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <20150513111010.GA7009@jannic.reliablesolutions.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Jan Niehusmann Cc: David Airlie , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Gummerer , Daniel Vetter List-Id: dri-devel@lists.freedesktop.org T24gV2VkLCBNYXkgMTMsIDIwMTUgYXQgMDE6MTA6MTFQTSArMDIwMCwgSmFuIE5pZWh1c21hbm4g d3JvdGU6Cj4gT24gV2VkLCBNYXkgMTMsIDIwMTUgYXQgMDQ6MDI6MjVQTSArMDUzMCwgU3VkaXAg TXVraGVyamVlIHdyb3RlOgo+ID4gPiBXaGF0IEknbSBtaXNzaW5nIGluIHRoZSByZXBvcnQsIGFy ZSBzb21lIGxvZyBlbnRyaWVzIEknbSBzZWVpbmcgb24gbXkKPiA+ID4gbm90ZWJvb2s6Cj4gPiA+ IAo+ID4gPiBBcHIgMzAgMDg6NTA6MjMgbG9jYWxob3N0IGtlcm5lbDogW2RybTppbnRlbF9jcHVf Zmlmb191bmRlcnJ1bl9pcnFfaGFuZGxlciBbaTkxNV1dICpFUlJPUiogQ1BVIHBpcGUgQiBGSUZP IHVuZGVycnVuCj4gPiA+IEFwciAzMCAwODo1MDoyMyBsb2NhbGhvc3Qga2VybmVsOiBbZHJtOmlu dGVsX3BjaF9maWZvX3VuZGVycnVuX2lycV9oYW5kbGVyIFtpOTE1XV0gKkVSUk9SKiBQQ0ggdHJh bnNjb2RlciBCIEZJRk8gdW5kZXJydW4KPiA+ID4gQXByIDMwIDA4OjUwOjI5IGxvY2FsaG9zdCBr ZXJuZWw6IFtkcm06aW50ZWxfY3B1X2ZpZm9fdW5kZXJydW5faXJxX2hhbmRsZXIgW2k5MTVdXSAq RVJST1IqIENQVSBwaXBlIEEgRklGTyB1bmRlcnJ1bgo+ID4gPiBBcHIgMzAgMDg6NTA6MjkgbG9j YWxob3N0IGtlcm5lbDogW2RybTppbnRlbF9wY2hfZmlmb191bmRlcnJ1bl9pcnFfaGFuZGxlciBb aTkxNV1dICpFUlJPUiogUENIIHRyYW5zY29kZXIgQSBGSUZPIHVuZGVycnVuCj4gPiBoaSwKPiA+ IEkgYWxzbyBoYXZlIHRoZSBzaW1pbGFyIGVudHJpZXMgaW4gbXkgZG1lc2csIHRob3VnaCBteSBw cm9ibGVtIGlzIGEKPiA+IGxpdHRsZSBkaWZmZXJlbnQgZnJvbSB5b3VycyBhbmQgbXkgYmlzZWN0 IGxlYWQgdG8gYW5vdGhlciBjb21taXQuCj4gPiBBbmQgdGhhdCBhbHNvIGlzIHN0aWxsIG5vdCBm aXhlZCAobGFzdCB0ZXN0ZWQgd2l0aCA0LjApLgo+IAo+IChQbGVhc2Ugbm90ZSB0aGF0IEkgZGlk bid0IGRvIGEgYmlzZWN0IC0gdGhhdCB3YXMgVGhvbWFzLiBJIG9ubHkgbm90ZWQKPiB0aGF0IEkg Y2FuIGNvbmZpcm0gaGlzIG9ic2VydmF0aW9ucyBhbmQgdGhhdCBoaXMgcGF0Y2ggaGVscHMgdG8g cHJldmVudAo+IG9yIGhpZGUgdGhlIGlzc3VlLikKPiAKPiBQZXJoYXBzIHRoZXNlIGFyZSB0d28g Y29tcGxldGVseSB1bnJlbGF0ZWQgaXNzdWVzPwp5ZXMsIG1heWJlIHVucmVsYXRlZCBpc3N1ZS4g c2luY2UgSSBhbSBhbHNvIGhhdmluZyBzaW1pbGFyIGVycm9ycyBpbgpkbWVzZyBhbmQgYWxzbyBo YXZpbmcgYSBzaW1pbGFyIHR5cGUgb2YgcHJvYmxlbSBzbyByZXBsaWVkIGhlcmUuCgpyZWdhcmRz CnN1ZGlwCj4gCj4gSmFuCj4gCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNr dG9wLm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50 ZWwtZ2Z4Cg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754597AbbEML3O (ORCPT ); Wed, 13 May 2015 07:29:14 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:36647 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754573AbbEML3K (ORCPT ); Wed, 13 May 2015 07:29:10 -0400 Date: Wed, 13 May 2015 16:58:59 +0530 From: Sudip Mukherjee To: Jan Niehusmann Cc: Jani Nikula , Thomas Gummerer , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, David Airlie , Daniel Vetter , Tvrtko Ursulin , Michael Leuchtenburg , Matt Roper Subject: Re: [BUG/REGRESSION] Screen flickering Message-ID: <20150513112859.GA8887@sudip-PC> References: <87pp65efmo.fsf@hank.tgummerer.com> <87iobw3klc.fsf@intel.com> <20150513095319.GA4249@jannic.reliablesolutions.de> <20150513103224.GA8470@sudip-PC> <20150513111010.GA7009@jannic.reliablesolutions.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150513111010.GA7009@jannic.reliablesolutions.de> 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 Wed, May 13, 2015 at 01:10:11PM +0200, Jan Niehusmann wrote: > On Wed, May 13, 2015 at 04:02:25PM +0530, Sudip Mukherjee wrote: > > > What I'm missing in the report, are some log entries I'm seeing on my > > > notebook: > > > > > > Apr 30 08:50:23 localhost kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun > > > Apr 30 08:50:23 localhost kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun > > > Apr 30 08:50:29 localhost kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun > > > Apr 30 08:50:29 localhost kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun > > hi, > > I also have the similar entries in my dmesg, though my problem is a > > little different from yours and my bisect lead to another commit. > > And that also is still not fixed (last tested with 4.0). > > (Please note that I didn't do a bisect - that was Thomas. I only noted > that I can confirm his observations and that his patch helps to prevent > or hide the issue.) > > Perhaps these are two completely unrelated issues? yes, maybe unrelated issue. since I am also having similar errors in dmesg and also having a similar type of problem so replied here. regards sudip > > Jan >