JorgeeFG Asked: 2012-08-27 18:14:10 +0800 CST2012-08-27 18:14:10 +0800 CST 2012-08-27 18:14:10 +0800 CST How to control Brightness on Acer Laptop [duplicate] 772 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. brightness 2 Answers Voted Best Answer JorgeeFG 2012-08-30T06:14:30+08:002012-08-30T06:14:30+08:00 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. Sarthak killer 2013-05-04T22:56:44+08:002013-05-04T22:56:44+08:00 Most simple and fast way to do this.... Use this command xrandr --output LVDS1 --brightness 0.5 Set the value in between 0 to 1 like in this case it is 0.5 This works for me Try this !!!
Solution:
Edit GRUB:
change GRUB_CMDLINE_LINUX_DEFAULT to
then:
Reboot.
Controls are working.
Most simple and fast way to do this.... Use this command
Set the value in between 0 to 1 like in this case it is 0.5 This works for me Try this !!!