From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965463Ab1GOLAw (ORCPT ); Fri, 15 Jul 2011 07:00:52 -0400 Received: from mail-pv0-f174.google.com ([74.125.83.174]:54954 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964787Ab1GOLAv (ORCPT ); Fri, 15 Jul 2011 07:00:51 -0400 Subject: Re: Dropped IRQ disables Radeon 3D Date: Fri, 15 Jul 2011 10:53:41 -0000 From: Michael Witten To: Benjamin Herrenschmidt Cc: Arnuschky , linux-kernel@vger.kernel.org Message-ID: <15f2d51a1ab5412a9d7c327ab67b8166-mfwitten@gmail.com> In-Reply-To: <1310720984.4968.313.camel@pasglop> References: <0fe54f4a77b64475b9e6041d9ef5772b-mfwitten@gmail.com> <1310720984.4968.313.camel@pasglop> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 15 Jul 2011 19:09:44 +1000, Benjamin Herrenschmidt wrote: > On Fri, 2011-07-15 at 08:20 +0000, Michael Witten wrote: >> >> Arnuschky wrote to me about this related Debian bug report: >> >> Fri, 2010-06-18 10:21:05 +0000 >> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=586312 >> >> I popped over to #radeon on freenode where user agd5f told me to >> try the following on the kernel command line: >> >> pci=nomsi >> >> After reading about MSIs and the requisite CONFIG_* settings, I >> realized that I didn't even have MSI support in the kernel anyway. >> Then agd5f suggested the following patches by Benjamin Herrenschmidt >> might be of help: > > Another problem I noticed is some cards, when not using MSIs, still seem > to shoot an MSI with whatever value was last programmed into the MSI > configuration space. Can you check with lspci -vv if there's a non-0 > value in there ? It -could- be that your get bogus MSIs. So, you want me to boot my Linux version that doesn't have MSI support and check whether `sudo lspci -vv' says that it is using MSIs?