[Bug 236922] Virtio fails as QEMU-KVM guest with Q35 chipset on Ubuntu 18.04.2 LTS

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236922

Jamie Landeg-Jones <jamie@catflap.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jamie@catflap.org

--- Comment #72 from Jamie Landeg-Jones <jamie@catflap.org> ---
I recently tried to install 13.0-RELEASE and 13.0-STABLE (20210701) on a kvm
host, and it hangs the same way described above with q35, but works with
i440-fx

I don't have access to the host (I'm a VM customer) 

I can get a prompt from the q35 instance by setting in the loader via the boot
menu:

set hw.ata.ata_dma=0
set hw.ata.atapi_dma=0

However, things are weird (The "Install" menu button doesn't do anything, but
"Shell" does)

And "reboot" completely hangs after saying all disks synced.

I've attached kenv output. Anything else that would help?

Cheers, Jamie

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