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rated 0 times [ 14] [ 0] / answers: 1 / hits: 15724 / 2 Years ago, wed, april 20, 2022, 9:12:46

I've installed Ubuntu 12.04 in an Acer Timeline X 5830TG and brightness controls were not working (Fn + Key), even the Ubuntu's one.

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answered 2 Years ago huovie · Accepted Answer

Solution:

Edit GRUB:

sudo nano /etc/default/grub

change GRUB_CMDLINE_LINUX_DEFAULT to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

then:

sudo update-grub

Reboot.

Controls are working.