I own a quite old laser printer, Canon LBP-350 sold in Japanese market. It has both Centronics parallel port and USB port. I used to connect it and my Linux desktop machine with the parallel port, but my current main Linux box does not have parallel port. So, I once tried to connect the laser printer with the current main box using USB, but it didn't work. Today, I tried again , but it didn't. I checked how the Linux box was seeing the printer over USB bus using lsusb command as follows: # lsusb -t /: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/2p, 12M /: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/3p, 12M /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M |__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M |__ Port 3: Dev 4, If 0, Class=Mass Storage, Driver=uas, 480M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/14p, 480M |__ P