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[–] ttyS0 0 points 3 points (+3|-0) ago 

You should check first whether your BIOS actually enables IOMMU at all or if manually enabling works. If you see no mention of “AMD-Vi”, you should try adding the boot parameters iommu=pt iommu=1 temporarily for an AMD CPU. If still nothing pops up, your CPU/chipset most likely doesn’t support IOMMU.

Also GPU passthrough won’t work using a single GPU (you can’t force Linux to free the GPU it booted with). If you can’t force the system to boot up using the processor-integrated GPU, you can’t share the dedicated one.

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[–] 6levels [S] ago 

My CPU supports hardware virtualization but not AMD-vi or IOMMU virtualization according to wikipedia and the dmesg command, and it has 2 GPUs but the only thing this did is prevent this from appearing at boot :

[drm:atom_op_jump [radeon]] ERROR atombios stuck in loop for more than 5secs aborting

I think my BIOS is broken or something anyway, I remember updating to version 214 when I used Windows but it shows version 212, thanks anyway.

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[–] Tleilaxu_Ghola ago  (edited ago)

Does your CPU support hardware virtualization? I would think that would have to be enabled / supported on top of what @tty50 mentions. What you are talking about is a whole different animal than being able to run VirtualBox on your system.