Toshiba Satellite L845
Fixing Fn Keys
If the Fn Keys do not work or exhibit incorrect behavior(e.g brightness keys suspending the laptop) it can be fixed doing the following:
/etc/default/grub find the line that says
GRUB_CMDLINE_LINUX="" and add the following kernel parameters:
/etc/modprobe.d/blacklist.conf add the following line:
blacklist.conf doesn't exist, create it.
sudo update-grub and reboot.