Hello,
we are using x2go server and clients both on Ubuntu 16.04. After
configuring new clients on small single board boxes like a ZODAC Zbox or
a Raspberry Pi 3 we observe severe screen redrawing problems an a very
poor performance in video transfer. E.G. shifting a Thunderbird-window
over a Firefox-window the latter remains scrambled with rests of
Thunderbird.
We didn't run into that problem in our former installation based on
Ubuntu 12.04. After searching for solutions in the compression method
and the CPU-performance of the clients I occasionally found out that the
problem disappears after connecting the client's monitor via VGA instead
of a HDMI connection. The problem even disappears when a HDI/VGA-Adapter
is used and the signal is fed to the monitor via an VGA-input. This was
tested with different monitors. In our former clients we only used VGA
connected monitors and so we could not see the problems.
The optical quality of a HDMI connected Monitor is notably better than
that of VGA connected one, furthermore the VGA connection seems to
become obsolete, so we would like to stay with HDMI.
What can be the reason and is there a way change the HDMI-output in to a
suitable configuration?
Best regards
Reinhold
