I didn't install anything myself, but only Ubuntu 12.04 LTS on an Acer 4741g.
I use Fn+left/right to change the brightness, but failed.
How can I control the brightness levels?
12.04acerbrightness
I didn't install anything myself, but only Ubuntu 12.04 LTS on an Acer 4741g.
I use Fn+left/right to change the brightness, but failed.
How can I control the brightness levels?
Best Answer
Try this:
sudo nano /etc/default/grub
. It will ask for your password. Type it in.GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
. Change it toGRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
sudo update-grub
in the terminal.Hope it helps.
Works for Acer Aspire v3-571,Acer Aspire v3 571g,Hewlett Packard Bell EasyNote TS,Acer Aspire 4755G,Acer Aspire 5750-6866, Acer Aspire 5739, Lenovo T540p