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From: "Babutzka, Martin (EKP)" <martin.babutzka@kit.edu>
To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>
Date: Wed, 7 Jan 2015 19:33:42 +0100
Subject: x2go sessions insta-break with some GUI software (ROOT TBrowser)
Thread-Topic: x2go sessions insta-break with some GUI software (ROOT
 TBrowser)
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Package: x2goclient
Version: 4.0.3.0

x2goserver-version: 4.0.1.18-0~949 running on Ubuntu 14.04.1
x2goclient-version: 4.0.3.0 running on Windows 7

We are experiencing a strange bug in the interplay of x2go with a component=
 of the ROOT data analysis framework (https://root.cern.ch). Displaying GUI=
 windows in the ROOT framework, shows them shortly and results in an immedi=
ate CRASH of the X2go connection with a Windows error "vcxsrv.exe has stopp=
ed working" and subsequent closure of all opened remote applications.
Strangely the GUI window shows up when resuming the session in X2go. Runnin=
g the ROOT GUI window from pure vcxsrv, Xming, Mobaxfire or similar Windows=
 X-Server applications works flawlessly. It also worked previously with the=
 "baikal" version of X2go. I admit this seems to be an exotic bug but there=
 might be further graphical software affected which increases the severity =
of this bug.

Steps to reproduce:
- Install ROOT from the webpage or via "apt-get install root-system-bin" on=
 the x2goserver
- Run "root" on command line.
- Open a TBrowser with the command "TBrowser b"

After this the x2goclient slowly fills the "session" log with warnings of
"Proxy: WARNING! Handling data for finishing FD#6 channel ID#1."

This bug is a kind of a show stopper for us because we need ROOT for scient=
ific use. I would help to further track down the error and debug if I can g=
et some hints where and how to start.

Kind regards,
Martin