Bug 571869 - nvidia binary driver is broken and doesn't use DMA API correctly, leading to IOMMU faults
Summary: nvidia binary driver is broken and doesn't use DMA API correctly, leading to ...
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 12
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-03-09 18:30 UTC by mapsonder
Modified: 2010-04-04 04:06 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2010-03-15 14:43:46 UTC

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Description mapsonder 2010-03-09 18:30:35 UTC
Description of problem:

Since kernel upgrade machine freezes after Fedora progress bar before login.  Found DMA issue.  Workaround is kernel option iommu=soft.  For a newbie this would be a show stopper for using this version Linux on this big iron.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Software Update to kernel, from, which was working.
2. Reboot.
Actual results:

Soon after initial Fedora progress bar goes to black screen, no login.

ssh in from other machine shows dmesg keeps repeating

DRHD: handling fault status reg 2
DMAR:[DMA Read] Request device [01:00.0] fault addr 215da0000
DMAR:[fault reason 01] Present bit in root entry is clear

Expected results:

Log in normally and use computer.

Additional info:

The akmod-nvidia.x86_64 195.36.08-1.fc12 that is installed works fine with kernel

Workaround is on relevant kernel line, i.e. for, to append iommu=soft

Comment 1 David Woodhouse 2010-03-15 14:43:46 UTC
Closing NOTABUG. If you can reproduce without the broken nvidia module (i.e. if nouveau has similar problems), then please re-open.

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