I can't seem to get USB devices to work properly in Parallels. After any amount of USB activity, I get the following in dmesg: irq 9: nobody cared (try booting with the "irqpoll" option) Booting with the irqpoll option didn't help. This happens with any linux VM that I've tried in Parallels. Is there any way to force the IRQ of the USB device to be something else? Or is the USB device emulation by Parallels just flawed? The same USB devices under similar virtual machines in VirtualBox work just fine. Thanks.