$ uname -a
Linux carboy 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17) x86_64 GNU/Linux

$ lsb_release --all
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux testing-updates (sid)
Release:        testing-updates
Codename:       sid

$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 BYD TouchPad                         id=12   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ USB 2.0 Camera                            id=10   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]

$ lsusb
Bus 003 Device 002: ID 8087:8001 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04ca:300d Lite-On Technology Corp. Atheros AR3012 Bluetooth
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ tail -f /var/log/syslog #  *after* `tail`, plugged-in this keyboard: http://amzn.com/B00T1P6F1S

May  1 18:01:38 carboy kernel: [396101.480143] usb 1-1: new low-speed USB device number 18 using xhci_hcd
May  1 18:01:38 carboy kernel: [396101.640414] usb 1-1: New USB device found, idVendor=1017, idProduct=0002
May  1 18:01:38 carboy kernel: [396101.640418] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
May  1 18:01:38 carboy kernel: [396101.640420] usb 1-1: Product: Gaming Keyboard
May  1 18:01:38 carboy kernel: [396101.640629] usb 1-1: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
May  1 18:01:38 carboy kernel: [396101.640634] usb 1-1: ep 0x82 - rounding interval to 64 microframes, ep desc says 80 microframes
May  1 18:01:38 carboy kernel: [396101.652917] input: Gaming Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/0003:1017:0002.0013/input/input34
May  1 18:01:39 carboy kernel: [396101.708408] hid-generic 0003:1017:0002.0013: input,hidraw0: USB HID v1.11 Keyboard [Gaming Keyboard] on usb-0000:00:14.0-1/input0
May  1 18:01:39 carboy kernel: [396101.727733] input: Gaming Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.1/0003:1017:0002.0014/input/input35
May  1 18:01:39 carboy mtp-probe: checking bus 1, device 18: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1"
May  1 18:01:39 carboy mtp-probe: bus: 1, device: 18 was not an MTP device
May  1 18:01:39 carboy kernel: [396101.780571] hid-generic 0003:1017:0002.0014: input,hiddev0,hidraw1: USB HID v1.11 Device [Gaming Keyboard] on usb-0000:00:14.0-1/input1
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) config/udev: Adding input device Gaming Keyboard (/dev/input/event15)
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "evdev keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "libinput keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) systemd-logind: got fd for /dev/input/event15 13:79 fd 33 paused 0
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) Using input driver 'libinput' for 'Gaming Keyboard'
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: always reports core events
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "Device" "/dev/input/event15"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "_source" "server/udev"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) input device 'Gaming Keyboard', /dev/input/event15 is tagged by udev as: Keyboard
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) input device 'Gaming Keyboard', /dev/input/event15 is a keyboard
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) libinput: Gaming Keyboard: needs a virtual subdevice
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.1/0003:1017:0002.0014/input/input35/event15"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) XINPUT: Adding extended input device "Gaming Keyboard" (type: MOUSE, id 13)
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "AccelerationScheme" "none"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: (accel) selected scheme none/0
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: (accel) acceleration factor: 2.000
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: (accel) acceleration threshold: 4
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) input device 'Gaming Keyboard', /dev/input/event15 is tagged by udev as: Keyboard
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) input device 'Gaming Keyboard', /dev/input/event15 is a keyboard
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "evdev keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "libinput keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) systemd-logind: returning pre-existing fd for /dev/input/event15 13:79
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) Using input driver 'libinput' for 'Gaming Keyboard'
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: always reports core events
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "Device" "/dev/input/event15"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "_source" "_driver/libinput"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) libinput: Gaming Keyboard: is a virtual subdevice
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.1/0003:1017:0002.0014/input/input35/event15"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) XINPUT: Adding extended input device "Gaming Keyboard" (type: KEYBOARD, id 14)
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "xkb_model" "pc105"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "xkb_layout" "us"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (WW) Option "xkb_variant" requires a string value
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (WW) Option "xkb_options" requires a string value
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) config/udev: Adding input device Gaming Keyboard (/dev/input/event7)
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "evdev keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: Applying InputClass "libinput keyboard catchall"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) systemd-logind: returning pre-existing fd for /dev/input/event7 13:71
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) Using input driver 'libinput' for 'Gaming Keyboard'
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Gaming Keyboard: always reports core events
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "Device" "/dev/input/event7"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (**) Option "_source" "server/udev"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) failed to create input device '/dev/input/event7'.
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (EE) libinput: Gaming Keyboard: Failed to create a device for /dev/input/event7
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (EE) PreInit returned 2 for "Gaming Keyboard"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) UnloadModule: "libinput"
May  1 18:01:39 carboy /usr/lib/gdm3/gdm-x-session[1504]: (II) systemd-logind: not releasing fd for 13:71, still in use


$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 BYD TouchPad                         id=12   [slave  pointer  (2)]
⎜   ↳ Gaming Keyboard                           id=13   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ USB 2.0 Camera                            id=10   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]
    ↳ Gaming Keyboard                           id=14   [slave  keyboard (3)]

$ lsusb
Bus 003 Device 002: ID 8087:8001 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04ca:300d Lite-On Technology Corp. Atheros AR3012 Bluetooth
Bus 001 Device 018: ID 1017:0002 Speedy Industrial Supplies, Pte., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub