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From "Michael Jumper (JIRA)" <>
Subject [jira] [Commented] (GUACAMOLE-125) Sometimes session is not initialised on Full screen
Date Wed, 17 May 2017 02:02:04 GMT


Michael Jumper commented on GUACAMOLE-125:

OK - this issue seems to be getting a lot of attention, so let me try to clarify where this
stands, and how testing needs to be done in general with respect to such issues.

When it comes to unexpected behavior within the remote desktop inside a Guacamole connection,
reproducing the issue reliably is important, but that is only the first step. The most important
thing to understand is that if you are encountering unexpected remote desktop behavior *there
are two places where the bug may reside*:

# Within Guacamole
# Within the protocol-specific library used by Guacamole to communicate with the remote desktop
(in this case FreeRDP)

There is no need to further confirm that this behavior is reproducible through Guacamole.
It clearly is. What needs to be determined is whether the same behavior occurs within FreeRDP.
Lacking that information, there is no progress to be made here, because there is no place
for a deeper investigation to begin (and any effort expended doing so would be a waste).

I will try to find time to determine the above myself in the next few days, but that's really
the best I can do at the moment. If this bug is important to you, and you want more attention
given to it, here is the methodology I would recommend when you perform your tests:

# Reproduce the bug using Guacamole, intentionally using a small screen size. Again, the idea
here is to cause the buggy session state, not to confirm that the bug is reproducible in Guacamole.
That much has been established.
# Connect using "xfreerdp", making sure to specify the exact same connection parameters so
you take over the same session. You should see Guacamole disconnect - close the tab at that
point so you don't end up in a reconnecting war (Guacamole may automatically retry the connection
after ~15 seconds).
# Move the RemoteApp window well outside the area where you saw Guacamole not drawing things
(measured from the upper-left corner of your monitor, the same distance that the window would
need to be from the upper-left corner of the browser window when you used Guacmole).
# Interact with the RemoteApp window *such that things should be drawn within the area affected
by the bug*.

If things are not drawn as expected, then you have confirmed that the bug is outside Guacamole,
and there is nothing further to be done here (except possible to confirm whether a more recent
version of FreeRDP fixes things). If things *are* drawn as expected, and you are absolutely
positive that the window was well within the buggy area relative to the upper-left corner
of the monitor, reconnect with Guacamole and recheck. If the bug comes back, then you have
confirmed that the bug is within Guacamole.

Please do not simply confirm whether you see this within Guacamole and stop there. The question
is not whether the problem can be reproduced with Guacamole (it can). The question is whether
the problem can be reproduced with FreeRDP's "xfreerdp" client. Answering the latter narrows
things significantly.


> 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: 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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