Laser 103a 更新固件前，可以连接树莓派4B，连接上以后出现 /dev/usb/lp1 设备。在产品下载中下载并更新固件V3.82.01.08以后，Laser 103a连接到树莓派4B以后，一旦发现打印机设备以后5秒会自动删除lp设备。内核信息如下： [ 179.026494] usb 1-1.1: new high-speed USB device number 5 using xhci_hcd [ 179.127601] usb 1-1.1: New USB device found, idVendor=03f0, idProduct=e82a, bcdDevice= 1.00 [ 179.127616] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 179.127625] usb 1-1.1: Product: HP Laser 103a [ 179.127632] usb 1-1.1: Manufacturer: HP Inc. [ 179.127640] usb 1-1.1: SerialNumber: CNB1NDT2Y9 [ 185.208069] usblp 1-1.1:1.0: usblp1: USB Bidirectional printer dev 5 if 0 alt 0 proto 2 vid 0x03F0 pid 0xE82A [ 185.208197] usbcore: registered new interface driver usblp [ 186.980176] usblp1: removed   树莓派4B使用Ubuntu Desktop 20.10，内核为：Linux raspberry 5.8.0-1016-raspi #19-Ubuntu SMP PREEMPT Tue Feb 9 20:12:43 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux   打印机接上64位X86的Linux和Windows都可以使用。