Bug 27063 - Nouveau does DMA to/from unexpected address
Summary: Nouveau does DMA to/from unexpected address
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
Depends on:
Reported: 2010-03-13 13:09 UTC by David Woodhouse
Modified: 2011-02-08 08:43 UTC (History)
1 user (show)

See Also:
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.

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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