[vfio-users] KVM Nvidia Passtrough Code 43 and freezes

[Jon Panozzo]

I did a lot of testing recently for Laszlo to help him diagnose the root cause.  Hoping he gets back to me when he gets back in town.  With Q35 + OVMF, I cannot get Windows to install (10 or 8.1).  The install media will boot if I use it on the USB or virtio-scsi bus, but the VM ends up crashing upon first reboot (the install actually starts and copies files, but upon first reboot, the VM crashes…every time).  This has nothing to do with VFIO/GPU pass through though, as it happens even using virtual graphics, so I’m going to stop writing now and spamming the rest of the mailing list with an unrelated topic ;-)

- Jon

> On Aug 28, 2015, at 11:16 AM, Will Marler <will at wmarler.com> wrote:
> 
> 
> On Fri, Aug 28, 2015 at 10:10 AM, Jon Panozzo <jonp at lime-technology.com <mailto:jonp at lime-technology.com>> wrote:
> Just a quick reply on #5, we are using modern OVMF builds, but we don’t boot the install media over SATA.  Instead, we use the IDE bus for the install media and virtio drivers.
> 
> Yea, same with me. I was using virtio-scsi for the drives and IDE for install media. Both Windows 7 and Windows 10 would boot, I could select installation options, but as soon as Windows tried to copy files over, the VM would crash. I brought this up on the Arch thread when it was still unlocked, https://bbs.archlinux.org/viewtopic.php?pid=1545802#p1545802 <https://bbs.archlinux.org/viewtopic.php?pid=1545802#p1545802> and got an immediate response that worked. Since I have something working, I haven't experimented with new OVMF builds (and I don't know if the bug with the OVMF build I was using only presented during the install phase either).

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