0

i have the newest version.(I mean i think so) I do not know how to code and how to do other stuff to fix it. I don't see the slider in settings and fn+f5 and f6 won't work. Please help!

Archisman Panigrahi
  • 38,814
loyalzzz
  • 1
  • 1

1 Answers1

0

Xrandr is the command that usually comes preinstalled on Linux distributions.

In case it is not installed on your computer:

Open a terminal.

Run in it:

sudo apt update
sudo apt install --reinstall xrandr
xrandr -q

This last command will tell you the current state of your display, something like:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384

DisplayPort-0 connected 1366x768+0+0 (normal left inverted right x axis y axis) 410mm x 230mm


1366x768      59.79*+


1280x720      60.00


1024x768      75.03    60.00


832x624       74.55


800x600       75.00    60.32    56.25


640x480       75.00    59.94


720x400       70.08


HDMI-A-0 disconnected (normal left inverted right x axis y axis)


HDMI-A-1 disconnected (normal left inverted right x axis y axis)

As you can see, the connected display is DisplayPort-0 and the current resolution is 1366x768.

The brightness value must be between 0.0 and 1.0 where 0.0 refers to the dimmest value (full black) and 1.0 refers to the brightest value, e.g. to set the display brightness value to 0.7, run:

xrandr --output DisplayPort-0 --brightness 0.7

Replace DisplayPort-0 with the name of your display. 0.7 refers to 70% of the maximum display brightness.

To return to normal brightness, run:

xrandr --output DisplayPort-0 --brightness 1.0

Do not use anything above 1.0, or your screen will be completely white and you will not see anything clearly on the screen.

kyodake
  • 17,808