Tested as part of #2198, the client output shows:
Error presenting FBO: XError: BadMatch
Turning off alpha with XPRA_ALPHA=0 xpra attach..
causes it to segfault instead!
gl info collected on Ubuntu 16.04 with virtualbox 3D enabled
What happens here is that the latest driver now passes the gl feature and sanity checks, but still crashes at runtime, so r22054 re-adds "VMWare, Inc." to the blacklist.
A better solution is now in #2204.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2203