Red Hat Bugzilla – Bug 969966
Your BIOS is broken; DMAR reported at address fed90000 returns all ones!
Last modified: 2013-07-01 14:25:35 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):
Steps to Reproduce:
1. opening some page on the web browser
the system logout and send me to the login page
the browser should shows the page instead of crashing the system
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.
Moving to kernel for the crash. Do you have a full dmesg? The issue may be entirely unreleated to the DMAR warning.
No reply to Bill's question. The DMAR message is a BIOS issue we can't fix.