OK, I got to thinking about this other bug I had seen a while back. Initially
thought it was not related, but maybe it is after all?
https://bugs.launchpad.net/qemu/+bug/1694808
Perhaps we are using different USB controllers, and that's why we see different
results? I have the following ... match to your setup?
<controller type="usb" index="0" model="ich9-ehci1">
<address type="pci" domain="0x0000" bus="0x00" slot="0x1d"
function="0x7"/>
</controller>
<controller type="usb" index="0" model="ich9-uhci1">
<master startport="0"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x1d" function="0x0"
multifunction="on"/>
</controller>
<controller type="usb" index="0" model="ich9-uhci2">
<master startport="2"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x1d"
function="0x1"/>
</controller>
<controller type="usb" index="0" model="ich9-uhci3">
<master startport="4"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x1d"
function="0x2"/>
</controller>
And my USB device,
<hostdev mode="subsystem" type="usb" managed="yes">
<source>
<vendor id="0x046d"/>
<product id="0xc52b"/>
</source>
<address type="usb" bus="0" port="3"/>
</hostdev>
So the USB device is on ich9-uhci2, correct?
Thanks!
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https://bugs.launchpad.net/bugs/1906155
Title:
USB Passthrough Fails on Start, Needs domain Reset
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