From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from re04.intra2net.com ([82.165.46.26]:34908 "EHLO re04.intra2net.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755633Ab2DYPr0 (ORCPT ); Wed, 25 Apr 2012 11:47:26 -0400 From: Thomas Jarosch To: linux-pci@vger.kernel.org Subject: Re: [PATCH] pci: Add quirk for still enabled interrupts on Intel Sandy Bridge GPUs Date: Wed, 25 Apr 2012 17:22:14 +0200 Cc: Jesse Barnes , linux-kernel@vger.kernel.org, Drew Weaver , Charlie Suffin References: <4EDFD5BB.1050906@intra2net.com> In-Reply-To: <4EDFD5BB.1050906@intra2net.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Message-Id: <201204251722.14877.thomas.jarosch@intra2net.com> Sender: linux-pci-owner@vger.kernel.org List-ID: On Wednesday, 7. December 2011 22:08:11 Thomas Jarosch wrote: > Some BIOS implementations leave the Intel GPU interrupts enabled, > even though no one is handling them (f.e. i915 driver is never loaded). > Additionally the interrupt destination is not set up properly > and the interrupt ends up -somewhere-. > > These spurious interrupts are "sticky" and the kernel disables > the (shared) interrupt line after 100.000+ generated interrupts. Just a small heads up: Boards with the new Intel Ivy bridge chipset are affected, too. Currently known to be affected is Intel Desktop Board DH77EB Would be nice if Intel fixes the shared BIOS code... Thanks to Drew Weaver for reporting the issue. I currently don't have time to prepare another quirk. Best regards Thomas Jarosch