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I have a macbookpro (late 2013 retina model - 11,1) running xubuntu 13.10. I have the main laptop monitor and two Asus VS238H monitors. One connected by DVI and another by HDMI.

Currently, one external monitor has very washed out colors, the blacks almost look gray.

I have used different cables and can make the washed out colors appear on the alternate external monitor by switching the HDMI cable from the second monitor to the first.

Therefore, it seems to me that this color difference is something caused by the software and not the cables or monitors themselves. I've looked at xrandr settings (gamma and brightness) but that doesn't get the monitors to look the same.

Suggestions?

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I found a solution that worked for me here: https://www.kubuntuforums.net/showthread.php?63895-Black-level-too-high-after-upgrade-to-13-10

I tried to fix the problem with xrandr brightness and gamma settings too with no luck. In the end,

xrandr --output HDMI3 --set "Broadcast RGB" "Full"

was all I had to run.

My HDMI monitor also had this issue after upgrading to 13.10.

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  • Worked for Lenovo Yoga 2 to. Thanks for this!
    – j-i-l
    Apr 3, 2014 at 19:26

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