X2Go Bug report logs - #723
x2go sessions insta-break with some GUI software (ROOT TBrowser)

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Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: "Babutzka, Martin (EKP)" <martin.babutzka@kit.edu>

Date: Wed, 7 Jan 2015 18:50:02 UTC

Severity: normal

Found in version 4.0.3.0

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Subject: Bug#723: [X2Go-Dev] Bug#723: x2go sessions insta-break with some GUI software (ROOT TBrowser)
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From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: "Babutzka, Martin (EKP)" <martin.babutzka@kit.edu>, 723@bugs.x2go.org
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[Message part 1 (text/plain, inline)]
Hi Martin,

On  Mi 07 Jan 2015 19:33:42 CET, Babutzka, Martin (EKP) wrote:

> 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 immediate CRASH of  
> the X2go connection with a Windows error "vcxsrv.exe has stopped  
> working" and subsequent closure of all opened remote applications.
> Strangely the GUI window shows up when resuming the session in X2go.  
> Running 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  
> scientific use. I would help to further track down the error and  
> debug if I can get some hints where and how to start.
>
> Kind regards,
> Martin

Is it possible to be granted access to a reference installation that  
shows the above describe behaviour?

Esp. the fact, that resuming the "crashed" session gives me a bit of  
hope here.

Also: do you know if your software uses the X11 bigrequests extension?

Thanks+Greets,
Mike

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