Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753507Ab1BBDhP (ORCPT ); Tue, 1 Feb 2011 22:37:15 -0500 Received: from smtp-out.google.com ([216.239.44.51]:11982 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753178Ab1BBDhN convert rfc822-to-8bit (ORCPT ); Tue, 1 Feb 2011 22:37:13 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=google.com; s=beta; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=ID4dmZHWSTAMOjdeIxELIAZ6JRMwLwbwPpxBDwTI3nkYdKb1M+lOQkv7DLUSGUJEss 1LiHP0Vv+NY+XJCKfjHw== MIME-Version: 1.0 In-Reply-To: <20110201113238.60b33ff9@jbarnes-desktop> References: <849307$bc24ct@azsmga001.ch.intel.com> <1296471462-8578-1-git-send-email-chris@chris-wilson.co.uk> <20110201094643.366bc073@jbarnes-desktop> <20110201100833.3219687e@jbarnes-desktop> <20110201113238.60b33ff9@jbarnes-desktop> Date: Tue, 1 Feb 2011 19:37:09 -0800 Message-ID: Subject: Re: [PATCH] drm/i915: Suppress spurious vblank interrupts From: Hugh Dickins To: Jesse Barnes Cc: Chris Wilson , Mario Kleiner , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 946 Lines: 25 On Tue, Feb 1, 2011 at 11:32 AM, Jesse Barnes wrote: > What I find strange is that you're seeing flip pending interrupts.  Are > your symptoms affected if you remove the > I915_DISPLAY_PLANE_[AB]_FLIP_PENDING_INTERRUPT lines from > I915_INTERRUPT_ENABLE_FIX at the top of i915_irq.c? No. The first time it looked like yes it fixed it; but when I rebooted again, same symptoms and same underruns back: this thing is very erratic. > Do you see any calls to drm_mode_page_flip_ioctl() in your environment? None at all. Sometime I should do a bisection between v2.6.36 and v2.6.37 to see what started the underruns; but I can't promise when "sometime" will arrive. Hugh -- 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/