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The vGPU unlock is far more complicated. Also, it's very likely that it won't be a viable solution on the long run: I'm pretty sure Nvidia will put the authorized features in the card firmware for the next generation.
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I'm happy to hear you are working on VirtIO since both FreeBSD and Linux guests supports it well these days.
Obviously this is a big commitment, but I thought I'd post about it anyway in the hopes that it could one day become possible 🙂
One more thing that would be needed for virtio is spice support. This would actually be pretty cool as it allows piping USB, Audio and VGA to users connecting to the VM's console 🙂
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I have same issue with xcp-ng running eve-ng (network simulator). eve-ng VM crash when launching qemu with "accel=kvm".
netsted virt and e1000
eve-ng is built on ubuntu 18.04
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IOMMU should be enable in the BIOS. Double check that 🙂
Also please share your grub config to see if it's correctly written.
@leiwis-0 Ok! Borzel mantém o XCP Center. Talvez ele possa ajudar a entender o que está acontecendo se a reinicialização não funcionar.