Question

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rated 0 times [ 2] [ 0] / answers: 1 / hits: 3880 / 1 Year ago, mon, may 29, 2023, 11:35:55

I have got a laptop and i would like to correct gamma color on my external screen.

My system: Laptop, VGA port, Linux, Ubuntu.

In option System->Preferences->Monitor i turn off my laptop's screen.

But bash-command xgamma -gamma 5 does not any effect. BTW on laptop is (if it will turn on) too.

How can i get it?

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Location: Nepal

Member since Tue, Sep 8, 2020

4 Years ago

answered 1 Year ago atelti · Accepted Answer

Try adjusting it with the xrandr command.

First find your device name by entering:

xrandr

There's an output line like:

LVDS connected 1440x900+0+0 (normal left inverted right x axis y axis) 367mm x 230mm

You'll have to determine which choice is your external monitor.

The enter a command like (substituting for your device LVDS):

xrandr --output LVDS --prop --verbose --gamma 1.0:1.0:1.5

experiment with value, until you like the results. The numbesr must be floating point and they stand for red:green:blue.

The driver shouldn't matter.