On Thu, Feb 27, 2020 at 1:36 PM Toerless Eckert <[email protected]> wrote: > > I tried to get the NVidia 3D glasses IR emitter to work for windows 10 > in KVM (before NVidia F***ed with 3D fans and removed all support for > it from their drivers). No performance, but low-latency USB signalling > problem, delay through qemu was just miserable. > > I ended up buying a mini-PCIe USB3 card so that i had a separate > PCI USB controller rom the one on the motherboard and then passed > that PCI controller through to the VM. Works fine. > (mini-PCIe was the only free slot on my mini-ITX MoBo). > > Would expect there is also no performance degradation when using > passthrough. > > Cheers > Toerless
Unfortunately this isn't viable for me. All I have is a bunch of 1x pcie 2.0 ports, which is also insufficent. I'm about 100 mbps short with pcie 2.0. Need the full 600+ mbps of usb 3.0. Latency isn't as much of an issue. > > On Thu, Feb 27, 2020 at 12:39:04PM -0500, Peter Geis wrote: > > Good Afternoon, > > > > I have been trying to pass through a usb capture card over usb 3.0 to > > a windows vm. > > The device requires 90% of actual usb 3.0 bandwidth, as it captures > > native 1080p 60fps video. > > Unfortunately it seems the qemu usb controller cannot provide this, as > > the device fails to provide video at 1080p. > > > > I'm trying to find a way to debug this and have not had much success, > > can anyone point me in a direction to check?
