nouveau current git/2.6.32rc8 git dma/iommu errors?

* nouveau current git/2.6.32rc8 git dma/iommu errors?
@ 2009-11-24 21:37 Michael Breuer
  0 siblings, 0 replies; only message in thread
From: Michael Breuer @ 2009-11-24 21:37 UTC (permalink / raw)
  To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW

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

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