[winswitch] [xpra] How can I enable the av-sync option on the Xpra server?

[Ogata Yuki]

Hi there
I set up Ubuntu Server 16.04 environment with Windows Virtualbox and installed Xpra dependency library.
Then I installed Xpra v3.0.2 but I can't enable the av-sync option ...

When connecting from another PC Xpra client with --debug = av-sync option
Server = False, Client = True was output.

Are there any solutions or good ideas?

yogata