Bug 969966 - Your BIOS is broken; DMAR reported at address fed90000 returns all ones!
Your BIOS is broken; DMAR reported at address fed90000 returns all ones!
Status: CLOSED NOTABUG
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
18
x86_64 Linux
unspecified Severity urgent
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2013-06-03 04:08 EDT by Mattia Vio
Modified: 2013-07-01 14:25 EDT (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-07-01 14:25:35 EDT
Type: Bug
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Description Mattia Vio 2013-06-03 04:08:19 EDT
Description of problem:
after the yum update/upgrade of today the system is unstable.
Trying to open some page on the browser makes the system logout.
Using fedora at work this problem is killing my day.
I past a copy of the dmseg error below.



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


How reproducible:
always


Steps to Reproduce:
1. opening some page on the web browser

Actual results:
the system logout and send me to the login page


Expected results:
the browser should shows the page instead of crashing the system


Additional info:
 dmesg | grep -e DMAR -e IOMMU
[    0.000000] ACPI: DMAR 00000000bf7900f0 00090 (v01    AMI  OEMDMAR 00000001 MSFT 00000097)
[    0.000000] Your BIOS is broken; DMAR reported at address fed90000 returns all ones!
[    0.018478] dmar: IOMMU: failed to map dmar0
[    0.018481] dmar: parse DMAR table failure.
Comment 1 Bill Nottingham 2013-06-03 13:15:31 EDT
Moving to kernel for the crash. Do you have a full dmesg? The issue may be entirely unreleated to the DMAR warning.
Comment 2 Josh Boyer 2013-07-01 14:25:35 EDT
No reply to Bill's question.  The DMAR message is a BIOS issue we can't fix.

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