Cannot turn on IOMMU support

manymanymanyyears

New Member
Mar 15, 2022
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Hi, I'm trying to setup IOMMU so I can passthrough my iGPU to one of my VMs. It shows up in the PCIe devices list, but the VM won't boot with it because IOMMU is not enabled.

VT-d is enabled in the motherboard and the only part of the wiki's step-by-step I can't complete is accessing the Kernel Command Line. When I try to edit Grub the way it says I'm supposed to I get "/usr/sbin/grub-mkconfig: 11: /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT: not found" what am I missing? All I want to do is this:



Then, the IOMMU has to be activated on the kernel commandline.



The command line parameters are:



  • for Intel CPUs:intel_iommu=onCaptura de tela 2022-03-15 000558.pngCaptura de tela 2022-03-15 000644.png
 

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