Comment 4 for bug 1390857

Following the request, I updated the Bios, from the 302 to the 312 version, as proven by:

sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
X751LA.312
06/27/2014

I then run apt-get update && apt-get upgrade, but no new drivers were downloaded. I opened System Tools > Preferences > Additional Drivers, but again nothing was found.

The result of xinput list is unchanged:

⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech USB Receiver id=9 [slave pointer (2)]
⎜ ↳ Logitech USB Receiver id=10 [slave pointer (2)]
⎜ ↳ PS/2 Logitech Wheel Mouse id=14 [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)]
    ↳ Sleep Button id=8 [slave keyboard (3)]
    ↳ USB2.0 HD UVC WebCam id=11 [slave keyboard (3)]
    ↳ Asus WMI hotkeys id=12 [slave keyboard (3)]
    ↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]

(Logitech USB Receiver refers to the wireless mouse I'm using)