The Fn key wont work on my Toshiba satellite L735 on Ubuntu 12.04.
4 Answers
I have a Toshiba Satellite L510 with Ubuntu 12.04, I fixed this issue installing fnfx-client. And after installed, it worked automatically!!!
sudo apt-get install fnfx-client
Good luck!
sudo setpci -s 00:02.0 F4.B=X
Where x is 0-99, and 0 turns the display off. I have a Toshiba Satellite t135-S1309 and this was the only command I ever found to change the brightness. It's possible to set it up to bind to the keys or to set a brightness on boot, but I was never bothered by it to that degree. Not a perfect fix but it will change your brightness.
I had a similar problem with my Toshiba R830. What worked for me was the following changes to Grub:
Press Alt + F2 and type gksu gedit /etc/default/grub
Find the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
and modify it to one of the following:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
or
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"
or
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
(this is what worked for me but others had success with the former)
Save and close gedit.
Open a terminal (ctrl + alt + T) and type sudo update-grub. Reboot your pc after each try.
Hope this helps.
I had the same problem on my Toshiba
i installed fnfxd package search synaptic Package Manger for it
it solved my problem
hope it helps u too
please note the difference between fnfx and fnfxd the latest one solved my problem