Hello, Joshua. Not a problem since I'm all the time using KVM. >Can you verify by running `lsusb` that the device is actually there?
$ lsusb Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 008 Device 003: ID 055f:021f Mustek Systems, Inc. SNAPSCAN e22 Bus 008 Device 002: ID 04b4:0033 Cypress Semiconductor Corp. Mouse Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 002: ID 045e:00f7 Microsoft Corp. LifeCam VX-1000 Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0951:1666 Kingston Technology DataTraveler G4 <-- Here it is Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub >Has this worked in the past and suddenly stopped working? In a past VM booted well at list. Most of the time I've had a problem with passthrough USB-devices. Only sometimes after passthrough they was appeared in guest system. But anyway all the time guest system has been booted. But now it is even not able to boot. Please, ask for any additional info if needed. Thanks. ** Changed in: libvirt (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708013 Title: USB passthrough not working: failed to find host usb device 1:2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1708013/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs