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When changing the screen size with the command xrandr, terminal always returns:

xrandr: Failed to get the measure gamma to standard output

I'm using this blog as reference to change resolution.

message in my terminal

How can I fix it?

Glorfindel
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Mohammad Iqbal
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    Rather than snapshotting of terminal output, please copy the output to your question, then use code format on it. – Liso Jan 25 '17 at 06:43

1 Answers1

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The command sudo -s actually will grant you root privilege, so there's no need sudo anymore to register new mode. Besides, you do not need sudo with xrandr.

xrandr --newmode "1280x1024_60.00"   74.50  1280 1344 1472 1664 720 723 728 748 -hsync +vsync 
xrandr --addmode VGA-0 1280x1024_60.00

Replace VGA-0 with your connected device, run xrandr | grep -e " connected [^(]" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/" to get your paired device.

It also appear that the gamma error is related to graphic driver problem, you might want to take a look at following thread:

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Liso
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