A stupid thing but could be frustrating:
When you want to switch out of fullscreen in ubuntu’s terminal server client you have to enter:
but doing this in an ubuntu VM will result in full screen switching of vmware(the vm) and thus not the terminal server client running in the ubuntu vm.
to solve this enter
CTRL-ALT-SPACE this will passthrough all key combinations to the vm instead of applying them to vmware ws/server/player.
after this you can enter ctrl-alt-enter to switch full screen in TS client.