dmesg full of DMAR errors

From: Sven Köhler
Date: Mon Oct 24 2011 - 10:14:41 EST


I'm facing the same problems as described in

I'm not sure what the conclusion of the bugzilla discussion is:
1) you decided to not workaround the bug and I should disable VT-d instead
2) you decided to workaround the bug by blacklisting device IDs

The messages are:

DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000
DRHD: handling fault status reg 2

The devices in question are:
04:00.0 SD Host controller: Ricoh Co Ltd MMC/SD Host Controller (rev 03)
04:00.4 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 03)

04:00.0 0805: 1180:e822 (rev 03)
04:00.4 0c00: 1180:e832 (rev 03)

Product ID 0xe832 is not mentioned in the bug. Maybe it has not been
blacklisted if you went for (2)?

Sven Köhler

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