Regulating brightness using Fn-keys

Posted by richter12 on Ask Ubuntu See other posts from Ask Ubuntu or by richter12
Published on 2012-10-05T09:47:05Z Indexed on 2012/10/05 9:49 UTC
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brightness

I have a laptop with the newest Ubuntu-version (12.04). I want to use the FN-Keys to adjust the brightness of my screen, but it doesnt work. Normally it should be FN+left arrow/right arrow. However adjusting the volume with FN+ up arrow/down arrow works fine.

I already searched for a few soulutions, for example tried to replace in the Grub-File

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

with

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

or

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash cpi_osi=Linux"

but it all doesnt work for my laptop. How can I fix this problem?

Thank you very much!

Richter

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