I got the ubuntu app from windows store and connected to it via remote desktop, but everything's super tiny and there's just one resolution in the Display settings. I found some xrandr commands to add other resolutions:
$ xrandr --newmode "1680x1000_60.00" 139.25 1680 1784 1960 2240 1000 1003 1013 1038 -hsync +vsync$ xrandr --addmode DP-1 "1680x1000_60.00"
and it did add another resolution to the menu but selecting it doesn't change anything.