The first one was tested in VirtualBox (to see if it works under other Ubuntu versions since it wasn't working on my laptop under Ubuntu 15.04) so I guess that's why... I didn't know it would refuse to start if backlight wasn't controllable.
The first one was tested in VirtualBox (to see if it works under other Ubuntu versions since it wasn't working on my laptop under Ubuntu 15.04) so I guess that's why... I didn't know it would refuse to start if backlight wasn't controllable.