Virtualization on Ubuntu host with AMD Threadripper 7975

[Ben Barwick]

I'm running Ubuntu 24.04 on my laptop (System76 Darter Pro w/ Intel) and Workstation (System76 Thelio Mega with AMD Ryzen Threadripper 7975) both with Virtualbox 7.0.20 with a Windows 10 guest. I've installed the Virtualbox-dkms. Virtualbox works on my laptop no problem. On the workstation I am unable to get the Windows host to start up. I believe it has to do with the virtualization parameters. I only get a black screen if nested paging is on and paravirtualization interace is default. If I turn off nested paging, reduce the processors to 1, and use KVM paravirtualization it almost starts but I get the attached error.

I'm attaching a couple logs for KVM paravirtualization and HyperV paravirtualization (as much of the logs at the forum allows me to upload).

Any help would be so appreciated!

Thank you,

-Ben B.

[klaus]

Try disabling the 5th page table level (dunno if your CPU has it...) by adding "no5lvl" to your host's kernel command line... just a poke in the dark.

[Buscho]

Hi!

Had the same problem. Doubble check, if SR-IOV is enabled in the BIOS. After enabling it, I was able to start my VMs, even with nested paging checked!

Regards!

[Ben Barwick]

Thanks Buscho, SR-IOV was enabled in the Bios. Still no luck