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https://issues.apache.org/jira/browse/GUACAMOLE-125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16013292#comment-16013292
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Fermi Jiang commented on GUACAMOLE-125:
---------------------------------------

Checked HTML from the browser.

It appears that the canvas size is correct. But the RDP window is not drawn on 
the full size of canvas.

>From below HTML codes I can see the canvas size is 2188x784, which is the same 
>size as the outer black background div. But a maximized window is not drawn at 
>that big, which is only about 1028x776 or 654x494 (with transform: scale).

<div class="displayOuter">
<div class="displayMiddle">
<div class="display software-cursor" style="cursor: 
url("data:image/png;base64,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")
 3 3, auto;">
<div style="position: relative; width: 1392.62px; height: 499px;">
<div style="position: relative; width: 2188px; height: 784px; transform-origin: 
0px 0px 0px; transform: scale(0.63648, 0.63648);">
<div style="width: 2188px; height: 784px; position: absolute; left: 0px; top: 
0px; overflow: hidden;">
<canvas width="2188" height="784" style="z-index: -1; position: absolute; left: 
0px; top: 0px;"></canvas>
</div>
</div>
</div>
</div>
</div>
</div>

> 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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