PCI passthough on ASRock Z490M-ITX/ac

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   Hi, i am trying to get PCI passthough working on my ASRock Z490M-ITXAC on Ubuntu 21.04. 
I have a GPU that i want to pass though to a windows VM, but i belive that the GPU is getting grabbed by the system. 
I am quite sure that I have done all I need to in Ubuntu to not let the ubuntu driver grab the card, and i am looking into EFI settings.

I have spesified in: 
Advanced > Chipset Configuration > Primary Graphics Adapter
that i want to use the onboard graphics (IGPU i assume), but the display never wakes if i have it connected to the HDMI on the motherboard. 
But i can access the EFI setting when using the GPU. 
This leads me to belive that the Motherboard is not using the IGPU as primary. 

Any Idea what i am doing wrong?

HW list: 
ASRock Z490M-ITX/ac
Intel Core i3-10100
Radeon RX 580
Corsair VENGEANCE® LPX 32GB, 2 x 16GB 

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TC_ Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Feb 2021 Status: Offline Points: 4	Post Options Post Reply Quote TC_ Report Post Thanks(0) Quote Reply Topic: PCI passthough on ASRock Z490M-ITX/ac Posted: 20 Feb 2021 at 4:59am
	Hi, i am trying to get PCI passthough working on my ASRock Z490M-ITXAC on Ubuntu 21.04. I have a GPU that i want to pass though to a windows VM, but i belive that the GPU is getting grabbed by the system. I am quite sure that I have done all I need to in Ubuntu to not let the ubuntu driver grab the card, and i am looking into EFI settings. I have spesified in: Advanced > Chipset Configuration > Primary Graphics Adapter that i want to use the onboard graphics (IGPU i assume), but the display never wakes if i have it connected to the HDMI on the motherboard. But i can access the EFI setting when using the GPU. This leads me to belive that the Motherboard is not using the IGPU as primary. Any Idea what i am doing wrong? HW list: ASRock Z490M-ITX/ac Intel Core i3-10100 Radeon RX 580 Corsair VENGEANCE® LPX 32GB, 2 x 16GB

TC_ Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Feb 2021 Status: Offline Points: 4	Post Options Post Reply Quote TC_ Report Post Thanks(0) Quote Reply Posted: 21 Feb 2021 at 9:34pm
	I found the issue. Enable kernel setting is grub: "video=efifb:off pci=realloc" in addition to the setting i already had: "intel_iommu=on iommu=pt kvm.ignore_msrs=1 vfio-pci.ids=1002:67df,1002:aaf0" for completeness, here is the entire line from /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on iommu=pt video=efifb:off pci=realloc kvm.ignore_msrs=1 vfio-pci.ids=1002:67df,1002:aaf0"