21:32 - Wednesday, 23 April 2014

How Do You Adjust Screen Brightness On Acer Laptop?

#Topics: acer laptop screen brightness adjustments,adjust color acer laptop screen

I have an Acer Aspire one 5742 laptop. I installed Linux Ubuntu 12.10 on it. I have one problem with it. no matter how I press the Fn+ up or Fn + down keys I cannot adjust the Screen Brightness. It is at its maximum brightness and this drains the laptop battery. I did some googling and found out that you needed to change some settings in the grub file but I don’t know exactly what to do. Can anyone help me?

Reading here it says KeyTouch may fix the problem, as it has done for other Acer Aspire models.

Otherwise there are the commands below that can fix via the process you described. In the terminal type:

    sudo gedit /etc/default/grub

you will find a line like this:


change this line to (making sure to keep the quotation marks):

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

Save the file and then in the terminal type:

    sudo update-grub

Then it should be fixed.

Hope this helps. :)

I have a 4830t and the screen looked awful. I had to manual adjust the rgb gamma and the contrast. Now it looks a lot better.

I create a simple script to adjust it at boot


xgamma -rgamma .8
xgamma -bgamma .6
xgamma -ggamma .7
xcalib -contrast .88

exit 0

You can adjust the color and contrast to fit your taste.

I hope this helps

you can also adjust the brightness with xcalib