Hmm, I had one more idea. I used hot plug all the time (adding the device in virt-manager while the guest is up), I know that some security handling for apparmor and DAC are different between hotplug and starting with it.
Let me try to start with the device attached (but using USB 3 controller) ... Sorry, still just works for me - was worth a try :-/ I know we have gathered a lot of logs in the former bug, but we are now on 18.04 so lets give it another chance. Please: - enable libvirt debugging as instructed before - start your guest with a USB 3.0 controller but without the USB storage drive passed through - set your host to watch "dmesg -w" - start a "tail -f" on the libvirtd log - now attach the USB device in virt-manager - add a few newlines to both logs - then detach the USB device in virt-manager Does this work? If not please provide both logs (copy and paste from the two consoles) along with a "virsh dumpxml <guestname>" - maybe with the combination of those three we can find what is different. Other recommendations: - IIRC this is a windows guest, for the sake of trying how about an Ubuntu guest? - Any non "Fast USB 3 storage" devices around - how about passing through a secondary mouse or something like that - does that work? ** Changed in: libvirt (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1815588 Title: speed mismatch trying to attach usb device to guest vm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1815588/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs