Mint 15 Olivia Can't set screen brightness Dell Inpiron 15R

[Enkouyami]

When I was using Mint 14 cinnamon 64bit everything was perfect, but when I did a fresh install to Mint 15 Cinnamon 64bit, I lost the ability to set screen brightness on Dell Inpiron 15R.

[Dirk2013]

Hi Enkouyami,
maybe this post is helping you, I and some others had a likewise problem on other Laptops:

http://forums.linuxmint.com/viewtopic.php?f=49&t=121202

[den68]

Hi Enkouyami,

I had a similar issue.
What I did was to add the following line in /etc/default/grub :

Code: Select all

GRUB_CMDLINE_LINUX="acpi_backlight=vendor"

then

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sudo update-grub
sudo reboot

this solved it for me