On Tue, Nov 21, 2017 at 12:12:41PM -0800, Robert M. Muncrief wrote: > There's a bug in qemu-kvm, but only when using OVMF. It's very complicated > software and I did my best to research how to file a meaningful and detailed > bug for it but I'm stumped. > > The problem only occurs with Windows 7 and Windows 10 guests using OVMF, and > prevents passthrough HDMI from working on my R9-390 GPU, the video itself is > fine. The GPU HDMI works perfectly with SeaBIOS and bare metal installs (I > did bare metal test installs of both W7 and W10 in UEFI mode). I normally > run an Ubuntu 16.04 host, but also did a test install with Ubuntu 17.04 > since it has the latest qemu-kvm. I then did a test install with a Fedora 27 > host and the results were the same. Of course I also tried a plethora of > different W7/W10 HDMI driver versions, and worked on the problem for over > two weeks trying to solve it. What does "prevents passthrough HDMI" mean? Please post the exact commands you are executing, including the QEMU command-line (ps aux | grep qemu on the host). Please post exact error messages. > I would be content with SeaBIOS but though it works great with my GPU HDMI > it has passthrough problems with other things, in my case Marvell SATA > controllers (I tried 7 different Marvell chipset version PCIE cards as well > as my motherboard Marvell chipset). As a result I had to reconfigure my > computer and give up 5 SATA ports using a degraded configuration. By the way > the ASM1061 isn't an option because I'm trying to passthrough an optical > drive, which causes kernel hangs and crashes with all versions up to 4.14. Sounds like several other bugs which could also be reported if you provide details. > > So if someone could point me in the right direction on how to file this bug > I'll be happy to do whatever work is necessary, this is a fairly critical > issue fore me. I'm an embedded systems designer so I have substantial > technical skills, and have fully installed OVMF W7 and W10 guests. As I said > I just have have no idea where to begin to file a meaningful bug report that > can actually help developers discover the problem. Please post the details I've requested above. Hopefully that will make it possible to identify a person who can help debug it further. Thanks, Stefan
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