Same here on Ubuntu 15.10.
> xinput -list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Lenovo Ultraslim Wireless Keyboard & Mouse id=9 [slave pointer (2)] ⎜ ↳ MOSART Semi. 2.4G Keyboard Mouse id=11 [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)] ↳ Power Button id=7 [slave keyboard (3)] ↳ Lenovo Ultraslim Wireless Keyboard & Mouse id=8 [slave keyboard (3)] ↳ MOSART Semi. 2.4G Keyboard Mouse id=10 [slave keyboard (3)] ↳ Eee PC WMI hotkeys id=12 [slave keyboard (3)]
Same here on Ubuntu 15.10.
> xinput -list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Lenovo Ultraslim Wireless Keyboard & Mouse id=9 [slave pointer (2)]
⎜ ↳ MOSART Semi. 2.4G Keyboard Mouse id=11 [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)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Lenovo Ultraslim Wireless Keyboard & Mouse id=8 [slave keyboard (3)]
↳ MOSART Semi. 2.4G Keyboard Mouse id=10 [slave keyboard (3)]
↳ Eee PC WMI hotkeys id=12 [slave keyboard (3)]