X2Go Bug report logs - #1182
nxagent 3.6 and KDE4 causes X2Go Client for Windows's session window to "jump" up and down

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Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: Mike DePaulo <mikedep333@gmail.com>

Date: Sat, 27 May 2017 16:20:01 UTC

Severity: normal

Found in version 4.1.0.0

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Subject: Bug#1182: [X2Go-Dev] Bug#1182: nxagent 3.6 and KDE4 causes X2Go Client for Windows's session window to "jump" up and down
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From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Mike DePaulo <mikedep333@gmail.com>, 1182@bugs.x2go.org
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[Message part 1 (text/plain, inline)]
Hi Mike,

On  Sa 27 Mai 2017 18:15:06 CEST, Mike DePaulo wrote:

> Package: x2goclient
> Version: 4.1.0.0
>
> Note: It is unclear whether this is a bug in nx-libs or x2goclient/VcXsrv
>
> Note: This bug does not occur with nxagent 3.5 (& x2goserver 4.0.1.20-1.el7
> from EPEL)
>
> Note: This bug does not occur for Linux clients.
>
> Steps:
> 1. Start a KDE4 session in windowed mode.
> 2. Maximize the session.
> 3. Observe that the session window "jumps" up and down by tens of pixels.
> This happens repeatedly and very quickly. It has the appearance of it
> flickering almost. It makes it largely unusable.
>
> Note: This seems to go away on its own after seconds on my Windows 10
> client, but it lasted indefinitely on my Windows 7 client.
>
> Server: CentOS 7.3 with KDE4 & x2goserver 4.1.0.0 nightly & nx-libs
> 3.5.99.7 (from copr repo mikedep333/nx-libs-3.6)
> Client 1: Windows 7 x64 SP1 with X2Go Client 4.1.0.0-2017.03.11
> Client 2 Configuration 1: Windows 10 1703 x64 with X2Go Client
> 4.1.0.0-2017.03.11 (This has nx-libs 3.5.0.32)
> Client 2 Configuration 2: Windows 10 1703 x64 with X2Go Client
> 4.1.0.0-2017.03.11 & VcXsrv 1.19.2.0 (I replaced the VcXsrv subfolder)
>  (This has nx-libs 3.5.0.32)

this seems to be a duplicate of

https://github.com/ArcticaProject/nx-libs/issues/161

It would be really helpful, if you could test this with a non-X2Go  
based NX session.

How to achieve this:

  1) Adapt to your setup/needs: [1]
  2) Launch VcXsrv on Windows machine
  3) launch nxagent session on Linux server
  4) Launch KDE4 inside the NX session
  5) Launch nxproxy on the windows client as shown by [1]
  6) Test if the same issue occurs as observed with X2Go Client

I seem to remember that there is some Window-size manipulation code in  
X2Go Client somewhere when built on MS Win, so that might be obsolete  
with NX 3.6.

Mike


[1]  
https://github.com/ArcticaProject/nx-libs/blob/3.6.x/testscripts/run-nxproxy2nxagent-over-network
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