Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754317AbbEMLXf (ORCPT ); Wed, 13 May 2015 07:23:35 -0400 Received: from mail-wg0-f43.google.com ([74.125.82.43]:36800 "EHLO mail-wg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753565AbbEMLXc (ORCPT ); Wed, 13 May 2015 07:23:32 -0400 From: Thomas Gummerer To: Jan Niehusmann , Jani Nikula Cc: 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 In-Reply-To: <20150513095319.GA4249@jannic.reliablesolutions.de> References: <87pp65efmo.fsf@hank.tgummerer.com> <87iobw3klc.fsf@intel.com> <20150513095319.GA4249@jannic.reliablesolutions.de> User-Agent: Notmuch/0.19~rc1+3~g0d8251d (http://notmuchmail.org) Emacs/24.5.1 (x86_64-unknown-linux-gnu) Date: Wed, 13 May 2015 13:23:25 +0200 Message-ID: <87617w7mc2.fsf@hank.tgummerer.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3786 Lines: 63 Jan Niehusmann writes: > 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. I can see the same thing, though it looks slightly different to me, but the slight difference might be unrelated. > 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. I don't see the behavior on my external screen. Maybe some more information that might help: The laptop is a dell XPS 15 9530, screen resolution 3200x1800. The external display is connected via DisplayPort, resulution 1920x1080. Output from lspci: 00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) 00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06) 00:04.0 Signal processing controller: Intel Corporation Device 0c03 (rev 06) 00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) 00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5) 00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5) 00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5) 00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM87 Express LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05) 00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05) 00:1f.6 Signal processing controller: Intel Corporation 8 Series Chipset Family Thermal Management Controller (rev 05) 02:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1) 06:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b) 07:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5249 PCI Express Card Reader (rev 01) > 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 I see the last two messages in my dmesg output, but not the first two. > > 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/