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I've been using Ubuntu on my new laptop for a few days now and haven't had any issues I couldn't resolve until today. I plugged in an HDMI cable to extend the monitor and noticed that the secondary display has a deep green hue. I tried manipulating the monitor settings, but no matter what I change it remains a deep green.

I booted back into Windows 7 and tested the monitor with the same HDMI cable without any issues, so this is definitely something with Ubuntu. Any input would be greatly appreciated.

Hardware: Dell 14" / i3-2350M Processor / Integrated Graphics / Ubuntu 11.10


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closed as off topic by Jorge Castro, Ringtail, Mik, nitstorm, theDefector Nov 12 '12 at 21:23

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. –  Jjed Jul 31 '12 at 4:15

1 Answer 1

Perhaps you can try adjusting it with the xrandr command.

First find your device name by entering:


There's an output line like:

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

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

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

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

The driver shouldn't matter.

See this man page.

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