Server: FreeBSD 11, xpra: 2.0.2, xfce4-terminal 0.8.4_1. Client: Xubuntu 17.04, xpra: 2.0.2.
Please see wiki/ReportingBugs and wiki/Debugging. For example, please specify what you've tried (opengl off? clipboard off? etc), the exact commands you've used, etc..
I've tried 'xpra start :42 --start-new-commands=yes' and 'xpra attach'
Try turning off opengl, etc as per comment:1.
Ubuntu 17.04 is quite well tested so the problems are likely to come from your setup - which we cannot reproduce.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1560