Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933562AbbEMJxg (ORCPT ); Wed, 13 May 2015 05:53:36 -0400 Received: from mail.gondor.com ([78.47.100.206]:38221 "EHLO mail1.gondor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933159AbbEMJxa (ORCPT ); Wed, 13 May 2015 05:53:30 -0400 Date: Wed, 13 May 2015 11:53:19 +0200 From: Jan Niehusmann To: Jani Nikula Cc: 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: <20150513095319.GA4249@jannic.reliablesolutions.de> References: <87pp65efmo.fsf@hank.tgummerer.com> <87iobw3klc.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87iobw3klc.fsf@intel.com> 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 Content-Length: 1244 Lines: 28 Hi, On Wed, May 13, 2015 at 12:14:39PM +0300, Jani Nikula wrote: > Is this the same as https://bugzilla.kernel.org/show_bug.cgi?id=98141 ? The visible effect in the video is similar to what I see on the LVDS display. I also see some influence of the mouse pointer position on the blanked areas. The effect on the external screen is more like single scan lines jumping to the right and back, at a high (but still visible) frequency. 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 Jan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/