Try something like this:
SCREEN_07="xfreerdp /f /sec:rdp /rfx +fonts /cert-ignore
/sound:sys:pulse /smartcard /v:192.168.0.16"
i.e. put all your parameters in one line without setting the deprecated
RDP_OPTIONS and RDP_SERVER variables.
As I said, those are only there for backwards compatibility.
Initially I wrote xfreerdp as a separate screen script and I didn't
include those at all; then I put them there as an afterthought so that I
could merge it with the older rdesktop script.
What I don't like about them is that there's no matching between those
options and the screen number; i.e. they would have to be RDP_OPTIONS_07
and RDP_SERVER_07 instead, which isn't very pretty.
They were implemented as separate options for the web interface of
ltsp-cluster, but that's not developed or supported anymore.
If that answer satisfies you, then please close this bug report,
otherwise please open a bug report upstream in LTSP as the problem isn't
in the Debian packaging but in the upstream code, so
https://bugs.launchpad.net/ltsp/ is the proper place for it.
Cheers,
Alkis
