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I installed Ubuntu 14.04.02 as dual boot in a macbook pro 2012 13 I noticed that all function buttons works but except those that regulate the brightness of the screen.How do I fix this problem?

Mudit Kapil
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Riccardo
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1 Answers1

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I found an answer to this. However I have an iMac 2011, so it could solve your problem.

You need to edit the grub file /etc/default/grub change the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

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

Then run:

sudo update-grub

Rebooot your computer and voilà.

David Foerster
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Beshari
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