From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Breuer Subject: nouveau current git/2.6.32rc8 git dma/iommu errors? Date: Tue, 24 Nov 2009 16:37:12 -0500 Message-ID: <4B0C5208.60601@majjas.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org Hi, Newbie to this list. I've been using 2.6.32 & nouveau on F12. Things seem stable (although 3D performance is not great). I do see kernel error messages whenever I change window focus. The specific fault numbers vary, however the sequence is always: Nov 24 16:32:05 mail kernel: DRHD: handling fault status reg 702 Nov 24 16:32:05 mail kernel: DMAR:[DMA Read] Request device [02:00.0] fault addr 0 Nov 24 16:32:05 mail kernel: DMAR:[fault reason 06] PTE Read access is not set The fault status reg cycles from from 2 to 702 by 100 with each set of messages. I'm guessing this is a nouveau error as 2:00:0 is my Nvidia card (8800gts). I'm also guessing that this is deeply intertwined with intel_iommu. I do have vt-d enabled. I can enter this as a bug report, but wanted to see if anyone had suggestions first for resolving this (aside from disabling iommu). Thanks, Mike