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https://issues.apache.org/jira/browse/GUACAMOLE-125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15978125#comment-15978125
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Michael Jumper commented on GUACAMOLE-125:
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Do you see the same issue when using the native FreeRDP client with the same
parameters?
Since native remoteapp will attempt to integrate windows with the local desktop
(by copying portions of the workspace area into a local window when drawing
occurs), you may need to move the local window around a bit before you'll see
if things suddenly stop rendering in the off-screen area.
I expect this would be hard to reproduce in a non-Guacamole environment, since
it's unlikely the display size relevant to remoteapp will change in the native
case, but you might have success in causing the failure by:
# Intentionally reproducing the bug with Guacamole, using screen sizes which
are definitely smaller than your native display
# Attempting the same connection using FreeRDP's "xfreerdp" client, making sure
to specify the same parameters such that you end up in the same, pre-existing
remoteapp session.
> Sometimes session is not initialised on Full screen
> ----------------------------------------------------
>
> Key: GUACAMOLE-125
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-125
> Project: Guacamole
> Issue Type: Bug
> Affects Versions: 0.9.9, 0.9.10-incubating
> Environment: Guacamole running on Debian 8.6
> Forwarding a windows 2012 R2 session
> Reporter: Frank Giroud
> Priority: Minor
> Attachments: notepad_size_limit_detail.jpg, notepad_size_limit.jpg
>
>
> Sometimes after logging in (which happens to be Full scren) the windows
> session or the RemoteApp is not launched in full screen.
> In fact it behaves like there were a pseudo-resolution smaller than the
> required one.
> The browser (Chrome is open in a 1920*1200) but the screen displayed is
> locked to something like 1024*768 or so.
> When you click on the Fullscreen button. It open and let a black screen all
> around in the web browser. .
> -The behavior is the same if you start a windows session , the windows
> desktop displayed in the web browser is in a 'smaller display' and what
> remains is black.- Haven't succeed to reproduce after all
> I have succeeded to find a way to reproduce the behavior "kind of" more often.
> In my example i configure notepad++ to be a remoteapp (launch by ||notepad in
> guacamole )
> # Launch a session through Guacamole => No probleme guacamole can be set in
> fullscreen (on all the browser window)
> # Unmaximized the application
> # Ctrl-Shift-Alt menu => Disconnect
> # On the guacamole option menu (3 choices) => Reconnect
> # The result => my screenshot
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