Trying igd passthrough via kvm/qemu on Intel i7-8700t get so many erros in dmesg.

[intrash]

Apr 3 11:30:07 <lfs> kernel: [ 76.816543] DMAR: DRHD: handling fault status reg 3
Apr 3 11:30:07 <lfs> kernel: [ 76.816547] DMAR: [DMA Read] Request device [00:02.0] fault addr 3755cc8000 [fault reason 06] PTE Read access is not set
Apr 3 11:30:07 <lfs> kernel: [ 76.818663] DMAR: DRHD: handling fault status reg 3
Apr 3 11:30:07 <lfs> kernel: [ 76.818666] DMAR: [DMA Read] Request device [00:02.0] fault addr 3755cc8000 [fault reason 06] PTE Read access is not set
Apr 3 11:30:07 <lfs> kernel: [ 76.833211] DMAR: DRHD: handling fault status reg 3
Apr 3 11:30:07 <lfs> kernel: [ 76.833215] DMAR: [DMA Read] Request device [00:02.0] fault addr 27178e5000 [fault reason 06] PTE Read access is not set
Apr 3 11:30:07 <lfs> kernel: [ 76.835326] DMAR: DRHD: handling fault status reg 3
Apr 3 11:30:12 <lfs> kernel: [ 81.832910] dmar_fault: 1832 callbacks suppressed

sometimes this error happens and my whole network on this computer is gone.

grub: iommu=pt intel_iommu=on nomodeset

PLEASE someone help me .

This problem pops occasionally. It drives me crazy.

[DeividA_Intel]

Hello intrash,  

Thank you for posting on the Intel® communities. I understand you are having issues with your computer.

In order to better assist you, please provide the following:  

1. What is the operating system installed and its version?

2. IS the issue recent? If so, when did it start?

3. Can you provide more details about the behavior of the issue?

Regards,  

Deivid A. 

Intel Customer Support Technician 

[DeividA_Intel]

Hello intrash, 

Were you able to check the previous post and get the information requested? Please let me know if you need more assistance.   

Regards,  

Deivid A.  

Intel Customer Support Technician  

[DeividA_Intel]

Hello intrash,  

We have not heard back from you, so we will close this inquiry. If you need further assistance or if you have additional questions, please create a new thread and we will gladly assist you.  

Regards,  

Deivid A.  

Intel Customer Support Technician