I have a Surface Pro 7 connected to a HP Thunderbolt dock – I have connected a 4k AOC monitor and a standard HD monitor to the displayports on the dock but my 4k monitor will only allow 2560×1920 resolution while the Surface display and other monitor are at their full resolutions.
I have tried going into advanced display settings for my 4k monitor but all the options there are blank and it won’t allow me to change anything. However when I disable the other HD monitor my 4k monitor can output full 3840×2160 resolution.
Any suggestions please?
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