GPU Passthrough With Libvirt: Disabling the VGA Emulation

[TheCakeIsNaOH]

Well, you came to the right place for looking-glass. See the post below for, some more links to useful threads.

Looking Glass - Guides, Help and Support

Looking Glass What is looking glass? It is a program that uses DXGI (or NvFBC if you're on Quadros or better on Nvidia) to directly capture what is displayed on a video card in a windows virtual machine and then display that on a QEMU/KVM Linux Host in near real-time. Aren't there programs like Remote Desktop, VNC, etc that do this? Those programs provide remote access, yes, but in this case we are copying uncompressed the actual RGBA frames from the render pipeline on the virtual machine for display on the host. It seems similar, but is entirely different. For one we have extremely low latency (probably even less as time goes on since most of our latency seems to be down to the render pipeline in vendors' drivers rather than our own code...). If you are using IOMMU graphics in a virtual machine, and want to use productivity apps on that windows virtual machine at full speed/native performance, you should give this project a look. Known Issues This program is *alpha* quality. It's got bugs. Lots of bugs. It might be more bugs than substrate at this point (not really, but you know). Please read this thread very carefully before posting for help. Many known issues are posted on Geoff's site as well. Note: QEMU currently has a bug in relative-movement mouse pointers that is being worked on. For now, we still recommend using a separate input device (or toggling USB input passthrough between) because of these bugs in QEMU. They’re aware of them, will be fixed soon. Note2: For now, you probably still need something plugged into the passed-through GPU. This seems to depend, a bit, on the GPU but you can use a secondary input on your monitor (often) but not have to actually switch inputs to that display. We have also tested “dummy” EDID DisplayPort plugs as seen in the video, and those work fine, but it is hard to find dummy plugs that have a wide variety of supported display modes. We’ll probably link to some known good ones soon. OMG You Guys Rock! This is the help t…