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SubjectRe: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled
Date
Added some CCs.

On Tuesday 24 March 2009, Andrew Lutomirski wrote:
> On vanilla 2.6.29 (on Ubuntu 8.10), on a Lenovo x200s, my system is
> completely hosed on resume. It appears that even hard disk IO didn't
> work (trying to do *anything* including getting a dmesg trace just
> spewed sda io errors to the console). Hence no trace. I did an
> alt-sysrq-b and the screen went blank and the machine just started
> beeping at me.
>
> Resume works much better with intel_iommu=off. (I remember seeing a
> patch go by that purported to fix resume with IOMMU enabled, but it
> didn't work for me.)
>
> I'd be happy to try to make a better bug report if anyone has any bright ideas.
>
> --Andy


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