It is one more attempt to get
Fn keys to volume up/down, brightness, etc. working. Those controls are simply not working in my non-branded ultrabook.
I want to detect them to modify
/home/username/.config/openbox/lubuntu-rc.xml, as the following doesn't seem working:
<keybind key="XF86AudioRaiseVolume"> <action name="Execute"> <command>amixer -q sset Master 3%+ unmute</command>
keytouch are detecting when I press volumen up or brightness down, for example. The start/stop touchpad button is working, but is not detected by those applications either.
I also tried with
dconf-editor as it is suggested here.
next was already set to
XF86AudioNext (and it is
Here, I read the following explanation:
Some laptop Fn key combinations are multimedia keys (appearing to the OS as ordinary keys with nonstandard codes), while others trigger ACPI events that eventually reach the OS, and some are just handled by the BIOS and never seen by the OS. The information paths are explained on the Hotkeys/Architecture page on the Ubuntu wiki, complete with diagrams.
If the OS can't see anything when you press the brightness keys, it could be because they're handled directly by the BIOS. The battle is not completely lost — it is in principle possible to hack the BIOS — but the difficulty level is considerably raised.