I spent the day today creating a new VM with a more recent Ubuntu version (Kubuntu 15.04-alpha2), and which I haven’t put X11RDP onto (to avoid any conflicts). The result is better. But what looks like is happening, is the X Server is starting up with the “vmware” display driver, and the driver is not adding support for higher than 1366×768 resolution. If I try to manually add any higher resolutions and use xrandr to switch to them, I get nasty and uninformative opcode errors from xrandr. But, I can switch to 1366×768, at least. After giving up on the antique ESX vmware-tools, I installed the open-vm-tools and open-vm-tools-desktop packages with apt-get.