[X2Go-User] Incomplete redrawing,of screen

[K. Reinhold Trier]

It's not a problem of the of the Xserver. A (software) screenshot shows 
a correct screen, this is what the Xserver "thinks" he would display 
whereas the real screen is scrambled. But only in the case of a 
x2go-connection, not in local operations. And - as described before - 
only when using hardware of somehow low performance together with HDMI 
connection.
I found a posting describing a similar problem: 
http://lists.x2go.org/pipermail/x2go-user/2016-February/003717.html

Reinhold

Am 02.10.2017 um 17:29 schrieb Ulrich Sibiller:
> On Mon, Oct 2, 2017 at 4:49 PM, K. Reinhold Trier  > <R.Trier at it-jobst.de> wrote: >> 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? > > To me 
this sounds like a buggy Xserver on the client. There's really > nothing 
in X2go (or better: in NX) that cares about the type of > connection. > 
 > Uli

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.x2go.org/pipermail/x2go-user/attachments/20171003/e54bcac5/attachment.html>