Changing the driver solved the issue! Thank you very much! I'll get another power supply for a usb-port/a powered usb-hub, didn't know that the rainbow square indicates a lack of power.
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[Resolved] Black border despite overscan
Hello, I installed today Recalbox on my Raspberry Pi 2. Everything works fine but I can only use a part of my screen (an Acer V193 B) : (Image is attached) The screen is connected with a hdmi-to-DVI-Adapter. Changing the overscan-Settings in the config doesn't solve the problem of the black margin (on the left of the pink line). I have already reinstalled Recalbox but again the same issue. Changing the settings of the screen also doesn't help. It sounds a bit like https://github.com/digitalLumberjack/recalbox-os/issues/266 I wonder if anybody has a solution or a idea what I could do? Thank you very much! With best regards Felix