Bug 27063

Summary:	Nouveau does DMA to/from unexpected address
Product:	xorg	Reporter:	David Woodhouse <dwmw2>
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	bugs
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description David Woodhouse 2010-03-13 13:09:11 UTC

In systems with an IOMMU, we get DMA faults when the graphics card attempts to DMA to/from physical address zero.

Stray DMA considered harmful.

https://bugzilla.redhat.com/show_bug.cgi?id=561267

Comment 1 Paul Crook 2010-04-06 08:26:19 UTC

If its of any help I have a 64 bit system (based on Fedora 12) with exactly this problem using git versions of the kernel (2.6.34-rc2) and nouveau from freedesktop (obtained today).

While the system is idle I'm willing to try stuff out.

Comment 2 Lucas Stach 2011-02-08 08:43:21 UTC

As mentioned in the redhat bugzilla this bug is fixed.

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