On that link it seems that the monitor is giving different EDID information when it is connected via VGA and via HDMI. Could you try to connect it using VGA and attach the output of `xrandr -verbose`?
On that link it seems that the monitor is giving different EDID information when it is connected via VGA and via HDMI. Could you try to connect it using VGA and attach the output of `xrandr -verbose`?