With some devices, I get a speed mismatch with ehci-usb:
qemu-system-x86_64: Warning: speed mismatch trying to attach usb device "USB
Keyboard" (( speed) to bus "ehci.0", port "1" (high speed)
nec-usb-xhci fixes the keyboard+usb-storage case, but it breaks a webcam:
qemu-system-x86_64: Warning: speed mismatch trying to attach usb device
"Chicony WebCam" (high speed) to bus "usb.0", port "4.3" (full speed)
Anyway, -device usb-host,... binds to only one device. If you disconnect that
device, it will enumerate the next available one and use that. If you only have
one port, then you might have more luck with the 'hostport' option. Example
that adds all available ports (which might not be the best solution though):
qemu-system-x86_64 -usb -device usb-ehci,id=usb $(for i in {1..6};do echo
-device usb-host,bus=usb.0,hostbus=2,hostport=1.$i;done)
--
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https://bugs.launchpad.net/bugs/1377163
Title:
Does not add usb-host devices as they are hotplugged
Status in QEMU:
Opinion
Bug description:
A commandline such as
qemu-kvm -device usb-ehci,id=USBCtrl -device host-
usb,bus=USBCtrl.0,hostbus=3
should automatically add all devices on the given bus (here: 3) not
only initially, but also when new devices appear on that bus while
Qemu runs. Currently, all devices on the bus are added initially, but
new devices which are added to the (host) usb while Qemu runs have to
be added manually.
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