November 16, 20178 yr Community Expert This is a new and very weird issue. Most likely has something to do with passing through my Nvdia GPU... I now have two Win10 VMs. Both of them are running fine individually. I am passing through my Nvidia GPU to one of them. I am now trying to pass-through my USB keyboard or USB mouse. Just to one of the VMs (the one, to which I also passthrough the GPU). UPon adding either the USB mouse or USB keyboard, I can no longer start the VM. Instead I am seeing the following error message: *** internal error: qemu unexpectedly closed the monitor: 2017-11-16T13:46:54.708230Z qemu-system-x86_64: -chardev pty,id=charserial0: char device *** redirected to /dev/pts/4 (label charserial0)*** 2017-11-16T13:46:58.875101Z qemu-system-x86_64: -device usb-host,hostbus=2,hostaddr=2,id=hostdev3,bus=usb.0,port=2: Warning: speed mismatch *** trying to attach usb device "JMS56x Series" (super speed) to bus "usb.0", port "2" (full+high speed)*** 2017-11-16T13:46:58.991854Z qemu-system-x86_64: -device usb-host,hostbus=2,hostaddr=2,id=hostdev3,bus=usb.0,port=2: failed to open host usb device *** 2:2 Any thoughts?
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