I have a hp pavilion dv6 with xubuntu installed. however there isn't a way to change the screen brightness, i tried the fn plus scroll keys to no avail, any ideas?
- Open your terminal
sudo apt-get install xfce4-power-manager-plugins
- Enter your password and press y key to continue
- Right-click on the panel, Panel-> Panel Preferences...
- Come to the Items tab, click on Add new items button (+) and search for Power Manager Plugin
- Select it and click on the Add button
You need to download the following files in /etc/acpi/ directory
Download video_brightnessup.sh from here
Download video_brightnessdown.sh from here
After replacing these scripts
No reboot or logout required, simply press your function combination on your laptop to change brightness. Try to press FN + Up/Down Arrow.
I've had this problem as well.
What fixed it for me was adding
acpi_backlight=vendor to the kernel boot line. For more information see Brightness not working on an HP Pavilion Dv6 with a ATI Radeon HD6770M.
After doing this, I could change my brightness normally using the F2 and F3 keys.
What worked for me was modifying the /etc/default/grub file.
Change the line
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
Then in a terminal
sudo update-grub and reboot.