I have laptop asus k501ux, just installed ubuntu and it seems every key works except brightness controls, in my case it is Fn+F5 (up) and F6(down). any idea why is that happening and how to fix it?
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Possible duplicate of [Change brightness](http://askubuntu.com/questions/762643/change-brightness) – wjandrea Jul 30 '16 at 17:34
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@wjandrea It is not a duplicate of that question. – Pilot6 Jul 30 '16 at 17:36
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@Pilot6 How is it different? – wjandrea Jul 30 '16 at 17:37
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The laptop is different and the solution is different. Absolutely not related. – Pilot6 Jul 30 '16 at 17:38
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@pilot6 The linked question is just more broad (all Asus laptops instead of the k501ux specifically). I don't know enough about grub to talk about the solution, but it seems to be the same. – wjandrea Jul 30 '16 at 17:41
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1Anyway `acpi_osi=` is needed for this laptop. – Pilot6 Jul 30 '16 at 17:42
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Let us [continue this discussion in chat](http://chat.stackexchange.com/rooms/43252/discussion-between-wjandrea-and-pilot6). – wjandrea Jul 30 '16 at 17:42
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Related: http://askubuntu.com/q/816264/25388 – Léo Léopold Hertz 준영 Aug 29 '16 at 20:05
1 Answers
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- Go to the terminal and open grub file
sudo gedit /etc/default/grub
- Find
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
and change to this
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=native acpi_osi="
- Update grub
sudo update-grub
- Restart and it's done
That worked on Asus k501ux laptop
Giorgi Khmaladze
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1If my answer was helpful, you can accept it by clicking the check sign at the left of it, instead of editing in that it worked. @Giorgi Khmaladze – Pilot6 Jul 30 '16 at 17:35
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This is not sufficient in Asus Zenbook UX303UA, for instance, see if the problem still persists http://askubuntu.com/q/816264/25388 – Léo Léopold Hertz 준영 Aug 29 '16 at 20:05