我有 2 个老罗技演示者，新老。两者都在 Ubuntu 10.10 下工作。现在我有 Xubuntu 14.04 和较旧的演示者效果很好，但新的只有部分（只有 PgUp/PgDown，而不是 F5 和点。）
它dmesg来自新：
[74315.083647] usb 2-1.2: new low-speed USB device number 7 using ehci-pci
[74315.181566] usb 2-1.2: New USB device found, idVendor=046d, idProduct=c52d
[74315.181573] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[74315.181577] usb 2-1.2: Product: USB Receiver
[74315.181581] usb 2-1.2: Manufacturer: Logitech
[74315.190416] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input19
[74315.190685] hid-generic 0003:046D:C52D.0005: input,hiddev0,hidraw0: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:00:1d.0-1.2/input0
[74315.196456] input: Logitech USB …