On Mon, Oct 10, 2022 at 09:56:53AM -0400, Peter Geis wrote: > Good Morning, > > I've run into a bug with a new usb device when attempting to pass > through using qemu-kvm. Another device is passed through without > issue, and qemu spice passthrough does not exhibit the issue. The usb > device shows up in the KVM machine, but is unusable. I'm unsure if > this is a usbfs bug, a qemu bug, or a bug in the device driver. > > usb 3-6.2: usbfs: process 365671 (CPU 2/KVM) did not claim interface 0 > before use > usb 3-6.2: usbfs: process 365671 (CPU 2/KVM) did not claim interface 0 > before use > usb 3-6.2: usbfs: process 365672 (CPU 3/KVM) did not claim interface 1 > before use > usb 3-6.2: usbfs: process 365671 (CPU 2/KVM) did not claim interface 0 > before use > usb 3-6.2: usbfs: process 365672 (CPU 3/KVM) did not claim interface 0 > before use > usb 3-6.2: usbfs: process 365672 (CPU 3/KVM) did not claim interface 0 > before use These are warnings, not bugs, although one could claim that the warnings are caused by a bug in qemu-kvm. > The host system is Ubuntu 22.04. > The qemu version is as shipped: QEMU emulator version 6.2.0 (Debian > 1:6.2+dfsg-2ubuntu6.3) > The host kernel version is: 5.15.0-48-generic #54-Ubuntu SMP Fri Aug > 26 13:26:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux > > The VM is HomeAssistant, running kernel 5.15.67. Issue was also > observed on kernel version 5.10. Does the device work if your virtual machine has only one CPU? Alan Stern
