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https://issues.apache.org/jira/browse/GUACAMOLE-963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17320899#comment-17320899
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zilexa commented on GUACAMOLE-963:
----------------------------------

I am facing the same issue as described here, when connecting to a server that 
runs x11vnc on Ubuntu 20.10:

https://issues.apache.org/jira/browse/GUACAMOLE-421

But that one has been marked as resolved.

Still, when I use VNC Viewer (downloaded from RealVNC) to connect to x11vnc 
server, I don't have this issue. I can even watch a youtube video, looks like 
15fps but still. That is definitely not possible when connecting from/to the 
same devices via Guacamole, although the connection is faster than gnome vino 
(which I disabled). 

I am just wondering what is needed in Guacamole to be able to support _-ncache 
10._

> Add support for x11vnc -ncache
> ------------------------------
>
>                 Key: GUACAMOLE-963
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-963
>             Project: Guacamole
>          Issue Type: New Feature
>          Components: VNC
>            Reporter: Octavia Togami
>            Priority: Minor
>
> I would like Guacamole to support x11vnc's {{-ncache}} option.
> In my mind there are two possible ways to do this: either allowing users to 
> crop out sections of the connection (they would still need to be persisted in 
> the VNC client's memory, though this does save on network transmission to the 
> Guacamole client); or allow users to scale the view by _width_ rather than 
> _height_. The latter would implicitly hide the ncache space off-screen if the 
> width of the screen matches that of the other screen, though it wouldn't work 
> very well if they aren't the same.



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