FYI, as reported on x2go-user, the upgrade resolved Robert's issue:
> On Mon, Sep 19, 2016 at 1:50 AM, Robert Dinse <nanook(a)eskimo.com> wrote:
>>
>> It mostly worked. With x2goserver installed I can connect now with my
>> x2goclient and screen resizes properly. Also in Mate,
>> System->Preferences->Hardware->Displays now works.