Hey, I was trying to enable amd_iommu but when i type the following command dmesg | grep -i -e DMAR -e IOMMU it shows me these errors: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.8-x86_64 root=UUID=2b0cd0bb-9cff-492e-a9b3-bf636f06f933 rw quiet amd_iommu=on apparmor=1 security=apparmor …

Have you checked the IOMMU setting in BIOS? It should be under Advanced AMD CBS > NBIO Common Options > NB Configuration. FYI, there is newer BIOS available as well: [image] ASRock B450 Pro4 AMD AM4 Socket; Supports DDR4 3200+ (OC); 2 PCIe 3.0 x16, 4 PCIe 2.0 x1; AMD Quad CrossFireX™; G…

Amd_iommu=on | NEED HELP

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Yochanan 18 November 2020 19:08 6

Please post the output of the following as outlined here:

inxi -Fazy

sudo journalctl -p 3 -xb

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