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From "Nick Couchman (JIRA)" <>
Subject [jira] [Commented] (GUACAMOLE-125) Sometimes session is not initialised on Full screen
Date Thu, 17 Aug 2017 17:09:00 GMT


Nick Couchman commented on GUACAMOLE-125:

Nick, I very much appreciate you identifying the root cause, and the resolution, for this
I don't think I'd say we've identified root cause, yet.  We've identified that the problem
occurs with a specific version of FreeRDP, but not *why* it occurs.  I'm still going through
the FreeRDP source code when I have time trying to figure out what xfreerdp does differently
from Guacamole to see why xfreerdp works correctly.

Would you have an opportunity to update those images to include the above referenced FreeRDP
version which resolves this issue?

Presumably the Docker image uses the Dockerfile in the Github repo, which just bases the image
off the CentOS 7 core.  CentOS 7 ships with FreeRDP 1.0.2, so that's why that's the version
bundled there.  I've successfully built 1.1.x on CentOS 7, so it'll work, I just don't know
how much we want to deviate from what's available in the standard image - building custom
code (other than our own, that is, the Guacamole code) inside the docker image adds another
layer of stuff we have to manage (updates to the code, etc.), so, while it isn't all that
difficult, it isn't all that trivial, either.  Additionally, it really would be nice to figure
out what, specifically, about the way Guacamole invokes the RAIL plugin in 1.0.2 causes this
behavior.  Anyway, I'll let Mike or James chime in as to whether they want to update the docker
image to build the xfreerdp code from source instead of using RPMs.

> Sometimes session is not initialised on Full screen 
> ----------------------------------------------------
>                 Key: GUACAMOLE-125
>                 URL:
>             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: Critical
>         Attachments: fj1.png, fj2.png, fj3.png, fj4.png, fj5.png, fj6.png, notepad_size_limit_detail.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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