Using nano I created a configuration file that I didn't have.
Code:
/etc/modeprobe.d/sony-laptop.conf
I put this string in the new file:-
Code:
options sony laptop kbd_backlight=2
(2 is for the backlight to stay on for 60 seconds, 3 is unlimited)
After creating that config file I ran this cmd as 'root' and the backlight came on.
Code:
echo 1 > /sys/devices/platform/sony-laptop/kbd_backlight
Thanks again knudfl-
I found the answers in the links you you posted.