https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 04 Jun 2026 16:52:05 +0000 Sun, 21 Feb 2021 21:34:19 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=18175 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=18175&PID=84169&title=pci-passthough-on-asrock-z490mitx-ac#84169 Author: TC_
Subject: 18175
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"]]> Sun, 21 Feb 2021 21:34:19 +0000 https://forum.asrock.com/forum_posts.asp?TID=18175&PID=84169&title=pci-passthough-on-asrock-z490mitx-ac#84169 https://forum.asrock.com/forum_posts.asp?TID=18175&PID=84121&title=pci-passthough-on-asrock-z490mitx-ac#84121 Author: TC_
Subject: 18175
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
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