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I have a BeagleBone Black, wich is connected to a TV via HDMI. When I boot up the BeagleBone Black using a minimal Ubuntu image, I can see Tux greeting me in all his three-color glory, yellow feet and all, before he is being pushed off the TV-screen by a plethora of bootup messages.

I proceded to install xfce via

sudo apt-get install xfce4
sudo dpkg-reconfigure x11-common

I can start xfce with 

startxfce4

and see a Dekstop, but unfortunately, the colors are off: The blue background looks yellow or brown. Yellow hues look blue. Green seems to be unaffected.

photo of the TV screen showing a brown background (instead of blue)

edit: It looks as though the "red" and "blue" channel are switched.

I don't think it is a hardware issue, since the colors are OK during bootup. I found two unresolved reports of this problem.

I am new to xfce and don't know how to troubleshoot this issue. Any ideas?

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  • What did you change with dpkg-reconfigure x11-common? – BobDoolittle Oct 1 '14 at 13:39
  • I set "Users allowed to start the X Server" to "console users only". Afterwards I tweaked /etc/init/tty1.conf so that the default user would be logged in automatically, and I changed ~/.profile, so that startxfce4 is issued on a console login -> xfce now starts automatically on bootup. I don't think this is relevant, to be honest - sorry for the red herring. – Martin J.H. Oct 1 '14 at 15:24
  • I just uninstalled xfce and tried lxde - same problem. Putting the uSD into another BBB also did not help. – Martin J.H. Oct 4 '14 at 21:18
  • I gave up and installe the official BeagleBone Black Debian image. It uses lxde, but for some reason, the colors are not switched. – Martin J.H. Oct 5 '14 at 15:37
  • I would guess some non-standard driver or configuration... – BobDoolittle Oct 5 '14 at 16:56
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For what it's worth, I just installed Xfce on an Ubuntu 14.04 system (been meaning to do that - I hate Unity3D Desktop), and it looks just fine. So it appears you have a problem most likely with your hardware, and I recommend you contact the BeagleBone Black support folks.

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