Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752595AbbBXHo1 (ORCPT ); Tue, 24 Feb 2015 02:44:27 -0500 Received: from mga01.intel.com ([192.55.52.88]:51214 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752557AbbBXHoY (ORCPT ); Tue, 24 Feb 2015 02:44:24 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,637,1418112000"; d="scan'208";a="682472581" From: Jani Nikula To: Andrey Skvortsov , Sitsofe Wheeler Cc: Paul Bolle , Daniel Vetter , David Airlie , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ville =?utf-8?B?U3lyasOkbMOk?= , Matt Roper Subject: Re: [BISECTED REGRESSION in 3.19-rc1] [drm/i915] WARNING: drivers/gpu/drm/drm_irq.c:1077 drm_wait_one_vblank In-Reply-To: <20150223202802.GD3871@crion86> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20150131211609.GA3710@yulia-desktop> <1423053134.30076.12.camel@tiscali.nl> <20150204172645.GA2623@crion86> <1424092249.7482.10.camel@tiscali.nl> <87egpgre3d.fsf@intel.com> <87bnkkrdns.fsf@intel.com> <20150223202802.GD3871@crion86> User-Agent: Notmuch/0.19+54~g59142f6 (http://notmuchmail.org) Emacs/24.4.1 (x86_64-pc-linux-gnu) Date: Tue, 24 Feb 2015 09:45:16 +0200 Message-ID: <87wq37pxbn.fsf@intel.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: 2160 Lines: 57 On Mon, 23 Feb 2015, Andrey Skvortsov wrote: > On Mon, Feb 23, 2015 at 02:54:47PM +0200, Jani Nikula wrote: >> On Mon, 23 Feb 2015, Jani Nikula wrote: >> > On Mon, 16 Feb 2015, Paul Bolle wrote: >> >> I still see this on v3.19. I booted with drm.debug=0x4. The almost 2K >> >> lines in dmesg containing either "[drm" or this WARNING are pasted >> >> below. I really know nothing about all this, but I do note that only the >> >> WARNINGS are preceded by: >> >> [drm:intel_calculate_wm] FIFO watermark level: -5 >> >> [drm:i9xx_update_wm] FIFO watermarks - A: 26, B: 8 >> >> >> >> But perhaps that's another symptom of the same issue. A bit of staring >> >> at the code couldn't help me determine that. >> >> >> >> Perhaps these debug messages help someone in discovering what might be >> >> going on here. >> > >> > Please try v4.0-rc1 or try cherry-picking this on top of v3.19 and >> > report back: >> > >> > commit f9b61ff6bce9a44555324b29e593fdffc9a115bc >> > Author: Daniel Vetter >> > Date: Wed Jan 7 13:54:39 2015 +0100 >> > >> > drm/i915: Push vblank enable/disable past encoder->enable/disable >> >> https://bugs.freedesktop.org/show_bug.cgi?id=89108 >> > > Hi, Sitsofe, > > you wrote in your bug report (#89108), that you've got a black screen, when you tried drm-intel-nightly branch. > Do you have black screen with v4.0-rc1 on your eeepc? > If so, is it similar to that I described here https://lkml.org/lkml/2015/2/3/594 ? > As we both had drm_wait_one_vblank warnings, I assume that we have the same or similar chipsets. > And your black screen could be potentially the same as mine. Please try https://patchwork.kernel.org/patch/5861631/ BR, Jani. > > -- > Best regards, > Andrey Skvortsov > > PGP Key ID: 0x57A3AEAD -- Jani Nikula, Intel Open Source Technology Center -- 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/