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I need to turn off the backlit keyboard on my Sony Viao, with 64 bit Ubuntu 13.04. I'm prone to migraines, and the lights really bother my eyes.

I've ried several posted solutions, none work. (although one worked on Ubuntu 12.xx 32bit)

Here are some of the threads I've tried:

These don't work:

echo 0 > /sys/devices/platform/sony-laptop/kbd_backlight

     the directory exists, but not the file.

This looked promising:

sudo modprobe -v sony-laptop
modinfo sony-laptop

But then, neither of these worked:

sudo modprobe -v sony-laptop kbd_backlight=0
sudo rmmod -v sony-laptop; sudo modprobe -v sony-laptop kbd_backlight=0

I guess I'll try this anyway, and reboot:

echo "options sony-laptop kbd_backlight=1" | sudo tee /etc/modprobe.d/sony-laptop.conf

I'll let you know if it worked.

share|improve this question
Nope, just ran the last command above, and rebooted, but the backlight is still on. – Debbie V Aug 18 '13 at 18:46
PS. The last command has a typo: kbd_backlight=1, should be kdb_backlight=0 – Debbie V Aug 18 '13 at 18:49

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