@SKid: these parameters go in /etc/default/grub. Simply do:
- Press Alt+F2, enter "gksudo gedit /etc/default/grub" and press enter
- Change the line that reads
GRUB_CMDLINE_LINUX=""
to
GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"
- Save and exit
- Press Alt+F2, enter "gksudo update-grub", tick "Run in terminal" (to see
the progress) and press enter
Notice the "acpi_backlight=vendor" bit. This is a suggestion from
another user in a duplicate-ish of this bug (dealing with the same
problem for a different eeepc model), which makes the brightness OSD and
automatic brightness adjustment features work correctly.
--
Asus Eee PC 1201n: Function Keys
https://bugs.launchpad.net/bugs/537763
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