On Tue, 2017-01-17 at 18:49 -0500, Tom Horsley wrote: > I saw a blog post that claimed virt-manager 1.4 has the > support for 3D video acceleration in virtual machines, > then I saw lots of comments in the blog saying that > it won't work without libvirt support. Since I always > thought virt-manager just called libvirt to do everything > that confused the heck out of me :-). > > Are there instructions of dummies anywhere about how > to get 3D working in a virtual machine? > > Is there any chance it will ever work in a Windows > virtual machine (the only reason I have a Windows hardware > box is because I need to run an app that insists on 3D > support). I've also been looking at this but the situation is pretty murky at the moment as far as I can see. First of all, you need vfio support (could that be what you were thinking of) but KVM now has that. However to be able to run native-speed accelerated graphics you also need the hypervisor to support mapping the video hardware directly into the VM's address space without interference from the host system. This is complicated to say the least. Some people have got it working by using a motherboard GPU for the host and an additional GPU for the guest, possibly with an extra monitor. This requires a feature called VT-d on your Intel mobo (Note: *not* the same as VT-x), plus IOMMU enabled in the BIOS, and h/w support in the card, plus a bunch of kernel mods to enable all of this. Here's a 5-part blog by Alex Williamson to give you an idea of how hairy it is: https://vfio.blogspot.co.uk/2015/05/vfio-gpu-how-to-series-part-1-hardw are.html TL;DR: forget about getting accelerated graphics from sharing a single GPU between host and guest. It ain't gonna happen. poc _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
