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I have a Toshiba Portege R930 laptop and installed Lubuntu 12.10 through Wubi and then installed the Ubuntu-Desktop package afterwards.

When in Lubuntu, pressing FN+F6 and FN+F7 lowers and increases my screen brightness perfectly, however, when logging into Ubuntu (instead of Lubuntu), the function keys don't work.


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I have a similar problem with an Asus S200E. Some function keys (brightness, touchpad-toggle) do not work in Lubuntu. But they do in Ubuntu. – Mads Skjern Nov 22 '13 at 9:34

same problem for me, brightness key don't work with the kernel Linux 3.5.0-23-generic.

But when I boot with the Linux 3.5.0-17-generic (with grub, just hold shift key when booting and choose advanced , Linux kernel) everything just work !

as the Linux 3.5.0-17 is the base kernel, you should have it installed and you can try that trick.

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