Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755240Ab2FGQWE (ORCPT ); Thu, 7 Jun 2012 12:22:04 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:38762 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754673Ab2FGQWB (ORCPT ); Thu, 7 Jun 2012 12:22:01 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Thu, 7 Jun 2012 12:22:00 -0400 Message-ID: Subject: Re: [Regression] [Radeon] Stream command failures and render problems in Evergreen (Radeon HD 5600) in kernel 3.4 From: Jerome Glisse To: Roland Dreier Cc: Brian Gitonga Marete , LKML , David Airlie , Alex Deucher , Jerome Glisse Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1196 Lines: 26 On Thu, Jun 7, 2012 at 11:35 AM, Roland Dreier wrote: >> Update your libdrm to libdrm from git should fix your issue. > > That's unfortunate -- it means a kernel change breaks working userspace? Yes and no, welcome to GPU world. So this patch is suppose to report some GPU informations to userspace, sadly on some GPU we report wrong informations (that's a bug). So solution is to fix kernel to report right information, i think the following patch does that. http://www.mail-archive.com/stable@vger.kernel.org/msg09247.html The no side, is to have it broken you also need to have upgraded your libdrm, ie old libdrm/radeon with this kernel will work as previously. This issue have been fix recently in libdrm : http://cgit.freedesktop.org/mesa/drm/commit/?id=c2b77a02d4e188cfa6d1b73a721946fd9b1d3577 Of course here i am assuming that the bug Brian is experiencing is related to wrong tile infos reporting. Cheers, Jerome -- 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/