So, I appear to have spoken too soon on exactly what fixes this.

We have two systems being tested with 4.4.0-62-generic #83 - one with the
firmware update and one without.

The one with the firmware updates has been up for over 6 hours now without
any issues.

The one without firmware updates has been up for 40 minutes and is getting
I/O errors now.

I'm also seeing a system with 4.4.0-59-generic #80 and no firmware updates
boot up with iommu enabled, I will see how long it stays up..

I'll also test with 4.4.0-59-generic #80 and the firmware updates.

On Mon, Jan 30, 2017 at 6:13 PM, Jason Hobbs <jason.ho...@canonical.com>
wrote:

> We found testing with the latest Xenial kernel (4.4.0.62.65) from
> https://launchpad.net/~canonical-kernel-
> team/+archive/ubuntu/ppa/+build/11278866 fixes this issue - no firmware
> updates required.  We did also test with just the latest firmware
> updates, and that did not fix the issue. Latest firmware + 4.4.0.62.65
> also works.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1641593
>
> Title:
>   unable to enable iommu on HPE Proliant Gen9 server
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   I'm using MAAS to enable the following kernel flags on install/boot:
>
>     iommu=pt intel_iommu=on
>
>   in order to be able to passthrough SR-IOV VF functions to KVM guess;
>   however when these options are enabled, the servers fail to install
>   (see attached screenshot).
>
>   The install eventually fails - it looks like the writes back to one of
>   the disks starts to fail for some reason.
>
>   Servers are targeted with Xenial and the release 4.4 kernel (no HWE).
>
>   Here's the LSHW output from the system:
>   http://pastebin.ubuntu.com/23875929/
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
> 1641593/+subscriptions
>

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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

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