I'm running libvirt under Fedora 28. I would like to attach a USB device to a VM, but when I select "Redirect USB Device" from the "Virtual Machine" menu in virt-manager and then select the device, I get the error:
USB redirection error
spice-client-error-quark: Could not redirect [device name] at 1-11: Error setting USB device node ACL: 'Not authorized' (0)
There are no additional log messages acccompanying this in either the journal or in audit.log. It's not a selinux issue. The "Details" dropdown in the error dialog helpfully adds "USB redirection error".
What do I do with this error message? I'm not even sure what it's trying to tell me.