AMT KVM w boot option iommu=on

[fsmsolutions]

Hi, All

I use Ubuntu 13.10 (kernel 3.11.0 amd64) server running on dq67sw.

When I connect via VNC AMT,  appears  flashing icon in the upper right corner of the server screen.
When server loaded with the boot option iommu=on
each accompanied by a flashing icon output to console:
.....
Nov 28 07:40:41 dq67srv kernel: [ 9238.777273] dmar: DRHD: handling fault status reg 2
Nov 28 07:40:41 dq67srv kernel: [ 9238.777316] dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 2b7024d000 
Nov 28 07:40:41 dq67srv kernel: [ 9238.777316] DMAR:[fault reason 07] Next page table ptr is invalid
Nov 28 07:40:41 dq67srv kernel: [ 9238.777901] dmar: DRHD: handling fault status reg 3
Nov 28 07:40:41 dq67srv kernel: [ 9238.777942] dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 2b7024d000 
Nov 28 07:40:41 dq67srv kernel: [ 9238.777942] DMAR:[fault reason 07] Next page table ptr is invalid
Nov 28 07:40:41 dq67srv kernel: [ 9238.778029] dmar: DRHD: handling fault status reg 2
Nov 28 07:40:41 dq67srv kernel: [ 9238.778063] dmar: DMAR:[DMA Read] Request device [00:02.0] fault addr 2b7024d000 
Nov 28 07:40:41 dq67srv kernel: [ 9238.778063] DMAR:[fault reason 07] Next page table ptr is invalid
Nov 28 07:40:41 dq67srv kernel: [ 9238.778341] dmar: DRHD: handling fault status reg 3
......

[bash]user@dq67srv:~$ lspci |grep 00:02.0
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

[/bash]

Which makes it impossible to work through VNC.

1. How to suppress the flashing iconn
2. Why is this problem:

•   - Linux kernel
•   - Igfx driver
•   - ME firmware?

Thx, 
Maxim

[Gael_H_Intel]

Sounds like a Sandy Bridge system - AMT 7 - correct?  What is the configuration of your AMT Client?  FW version, AMT SDK verson and which tools are you using to connect to the KVM?  

[fsmsolutions]

My system:

Baseboard
Manufacturer	Intel Corporation
Product name	DQ67SW
Version	AAG12527-305
Serial number	BQSW110001WR
BIOS
Vendor	Intel Corp.
Version	SWQ6710H.86A.0066.2012.1105.1504
Release date	11/05/2012

Processor 1
Manufacturer	Intel(R) Corp.
Family	Intel® Core™ i7 Processor
Socket	SKTH
Version	Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
ID	13829424153406604967

VNC client: RealVNC VNC Viewer Plus 1.2.6(r113854) 

[ojw_nc]

Did you ever find a solution to this?