>-Dsun.java2d.opengl=false
>-Dsun.java2d.xrender=true
Thank you very much. This solves problem number two: When minimizing X2Go and 
opening it again, the application is re-printed successfully now.
Yet, the latencies remain. I already contacted the developers to get some more 
insights.

On 17 May 2018 09:46, Walid MOGHRABI <w.moghr...@servicemagic.eu> wrote:

>Try adding these options to your JVM args :
>
>-Dsun.java2d.opengl=false
>-Dsun.java2d.xrender=true
>
>
>Regards,
>Walid Moghrabi
>
>TRAVAUX.COM
>BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403
>13591 AIX EN PROVENCE CEDEX 3
>
>----- Mail original ----- 
>
>De: "Kevin Kremer" <kkmailingli...@gmail.com> 
>À: "Walid MOGHRABI" <w.moghr...@servicemagic.eu>, "Ulrich Sibiller" 
><ul...@gmx.de> 
>Cc: "x2go users" <x2go-user@lists.x2go.org> 
>Envoyé: Mercredi 16 Mai 2018 21:06:20 
>Objet: Re: [X2Go-User] Problems with java GUI application 
>
>Thanks all for your answers. 
>
>>You should definitely use open-jdk instead of Oracle jdk 
>I tried running OpenJDK but the java application seems to start 
>only when using Oracle Java. I checked the developer's 
>documentation which states Oracle Java as a requirement. 
>
>> Try with JOSM https://josm.openstreetmap.de/ 
>I tested https://josm.openstreetmap.de/ which runs without any 
>problems. 
>
>> Are you using the most current version of nx-libs (3.5.99-16)? 
>> What's the name of the app? Is it using OpenGL? And have you 
>> tried OpenJDK instead of Oracle's java? 
>We bought this application (called heimbas) for accounting and 
>documentation. I will try to contact the developers again, even 
>though I fear they will just refer to the RDP connection on our 
>old windows machine where the app is running fine. 
>As far as I know, it does not use any additional libs like OpenGL. 
>Can you tell me how to check the version of nx-libs? I simply 
>installed x2goserver and x2goserver-xsession which apparently do 
>not install an additional nx-libs package (apt policy nx-libs does 
>not know the package). 
>
>Best regards, 
>Kevin 
>
>
>On 16 May 2018 15:14, Walid MOGHRABI <w.moghr...@servicemagic.eu> 
>wrote: 
>
>>You should definitely use open-jdk instead of Oracle jdk ... I had many 
>>issues with Java applications under X2Go (especially unexpected crashes) 
>>until I went back to openjdk ... can't explain why but openjdk is A LOT more 
>>stable under x2go and not that slower. 
>> 
>>Regards, 
>>Walid Moghrabi 
>> 
>>TRAVAUX.COM 
>>BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403 
>>13591 AIX EN PROVENCE CEDEX 3 
>> 
>>----- Mail original ----- 
>> 
>>De: "Ulrich Sibiller" <ul...@gmx.de> 
>>À: "Kevin Kremer" <kkmailingli...@gmail.com> 
>>Cc: "x2go users" <x2go-user@lists.x2go.org> 
>>Envoyé: Mercredi 16 Mai 2018 09:28:11 
>>Objet: Re: [X2Go-User] Problems with java GUI application 
>> 
>>On Wed, May 16, 2018 at 9:16 AM, Kevin Kremer <kkmailingli...@gmail.com> 
>>wrote: 
>>> Hi all, 
>>> 
>>> I set up an X2Go server to connect to a remote machine and most 
>>> applications run very well. Unfortunately I rely on one java 
>>> application where some of its GUI components suffers huge 
>>> latencies. Here, actions like a click on a button take up to 10 
>>> seconds to perform while there is no delay when running the 
>>> application without X2Go. 
>>> The latencies can be reduced to 4 seconds by reducing the 
>>> connection speed to "MODEM" and the image quality to 0. However, 
>>> the latency is still huge compared to running the application 
>>> locally. 
>>> 
>>> Furthermore, the java application does not re-print its window and 
>>> it stays blank when minimizing the X2Go window. 
>>> 
>>> My setup: 
>>> I use Xfce as a desktop, the connection speed is set to "MODEM", 
>>> the compression algorithm is set to 16m-jpeg, the image quality 
>>> is set to 0 and I use Oracle's JRE 1.8.0_152. The problems also occur 
>>> when I connect to the host within the same LAN. 
>>> 
>>> Maybe someone has encountered similar problem and can give me a 
>>> few hints for solving them. 
>> 
>>Are you using the most current version of nx-libs (3.5.99-16)? What's 
>>the name of the app? Is it using OpenGL? And have you tried OpenJDK 
>>instead of Oracle's java? 
>> 
>>Uli 
>>_______________________________________________ 
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