I plugged my dell xps 13 developer into a projector today and the result was something like 8 bits of color, you can see it here:
I have the same problem if I connect it to my 46" TV. If I connect it and then turn the TV off and on again, the colors are correct.
It also works when I connect it to my 24" external dell display. Has anyone experienced anything like this?
The adapter that I am using is this one: https://www.startech.com/eu/AV/usb-c-video-adapters/usb-c-hdmi-adapter~CDP2HD
The output of xrandr is:
Screen 0: minimum 320 x 200, current 5120 x 1800, maximum 8192 x 8192
eDP-1 connected primary 3200x1800+0+0 (normal left inverted right x axis y axis) 294mm x 165mm
3200x1800 59.98*+ 47.99
2048x1536 60.00
1920x1440 60.00
DP-1 connected 1920x1080+3200+0 (normal left inverted right x axis y axis) 1060mm x 626mm
1920x1080 60.00*+ 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
....
720x400 70.08
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
Is it a problem that the monitor is recognized as DP-1 instead of HDMI-1? Dell XPS 13 Developer Kaby Lake. I've tried it with Ubuntu 16.04 and Ubuntu 16.10 with Kernel 4.4.0-59-generic and 4.8 and 4.9.