X2Go Bug report logs - #1064
Unhandled exception on Windows after remote connection lost

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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: "Chavez, Christopher A. (Assoc)" <christopher.chavez@nist.gov>

Date: Tue, 26 Jul 2016 19:00:01 UTC

Severity: normal

Found in version 4.0.5.1

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Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1064; Package x2goclient. (Tue, 26 Jul 2016 19:00:01 GMT) Full text and rfc822 format available.

Acknowledgement sent to "Chavez, Christopher A. (Assoc)" <christopher.chavez@nist.gov>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Tue, 26 Jul 2016 19:00:02 GMT) Full text and rfc822 format available.

Message #5 received at submit@bugs.x2go.org (full text, mbox):

From: "Chavez, Christopher A. (Assoc)" <christopher.chavez@nist.gov>
To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>
Subject: Unhandled exception on Windows after remote connection lost
Date: Tue, 26 Jul 2016 18:23:45 +0000
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Package: x2goclient
Version: 4.0.5.1

Using Windows 7 Enterprise 64bit. This issue occurs after the connection was somehow lost (possibly due to an ssh-related setting on the server, but this issue can still be triggered by disconnecting the network connection and waiting 120 seconds).

Message dialog that appears:
[cid:image001.png@01D1E72E.2F723220]
"The connection with the remote server was shut down. Please check the state of your network connection."

When that message appears, the main X2Go Client window is no longer responsive.
[cid:image004.png@01D1E668.655A77B0]
Last few messages in session log that appear for this issue:

Warning: No data received from remote proxy within 30 seconds.
x2go-WARNING-1> "English language requested, not loading translator."
x2go-WARNING-1> "English language requested, not loading translator."
Error: No data received from remote proxy within 120 seconds.
Session: Terminating session at '...'

Windows then brings up a message:
[cid:image001.png@01D1E665.EFF1C660]
"x2goclient.exe has stopped working.
A problem caused the program to stop working correctly. Please close the program."
(options: Close the program, Debug the program)

Visual Studio Debugger says:

Unhandled exception at 0x61AE3784 (libssh.dll) in x2goclient.exe: 0xC0000005: Access violation reading location 0x00000010.

I installed X2Go Client using the installer rather than compiling it, so I don't have any further debugging info.

Christopher A. Chavez
National Institute of Standards and Technology



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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1064; Package x2goclient. (Tue, 09 Aug 2016 08:00:02 GMT) Full text and rfc822 format available.

Acknowledgement sent to Stefan Baur <X2Go-ML-1@baur-itcs.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Tue, 09 Aug 2016 08:00:02 GMT) Full text and rfc822 format available.

Message #10 received at 1064@bugs.x2go.org (full text, mbox):

From: Stefan Baur <X2Go-ML-1@baur-itcs.de>
To: 1064@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#1064: Unhandled exception on Windows after remote connection lost
Date: Tue, 9 Aug 2016 09:56:26 +0200
[Message part 1 (text/plain, inline)]
Am 26.07.2016 um 20:23 schrieb Chavez, Christopher A. (Assoc):

> Using Windows 7 Enterprise 64bit. This issue occurs after the connection
> was somehow lost (possibly due to an ssh-related setting on the server,
> but this issue can still be triggered by disconnecting the network
> connection and waiting 120 seconds).

[...]

> Windows then brings up a message:
> 
> cid:image001.png@01D1E665.EFF1C660
> 
> "x2goclient.exe has stopped working.
> 
> A problem caused the program to stop working correctly. Please close the
> program."
> 
> (options: Close the program, Debug the program)

We've seen this before, with certain Nvidia drivers.
See http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=967
Could it be that you're using a Nvidia card, too?


> I installed X2Go Client using the installer rather than compiling it, so
> I don’t have any further debugging info.

Recent Windows builds of X2GoClient allow you to select a custom install
that drops an x2goclient.debug.exe next to the regular one.
If you're willing to assist, try running that and see if it generates
more verbose output.

Kind Regards,
Stefan Baur

-- 
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Geschäftsführer: Stefan Baur
Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364
Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1064; Package x2goclient. (Tue, 09 Aug 2016 19:50:01 GMT) Full text and rfc822 format available.

Acknowledgement sent to Christopher Chavez <chrischavez@gmx.us>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Tue, 09 Aug 2016 19:50:02 GMT) Full text and rfc822 format available.

Message #15 received at 1064@bugs.x2go.org (full text, mbox):

From: Christopher Chavez <chrischavez@gmx.us>
To: Stefan Baur <X2Go-ML-1@baur-itcs.de>, 1064@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#1064: Bug#1064: Unhandled exception on Windows after remote connection lost
Date: Tue, 9 Aug 2016 14:41:52 -0500
On Tue, Aug 9, 2016 at 2:56 AM, Stefan Baur <X2Go-ML-1@baur-itcs.de> wrote:
> We've seen this before, with certain Nvidia drivers.
> See http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=967
> Could it be that you're using a Nvidia card, too?
>

I can confirm that an Nvidia card was used on the machine. I don't remember the
specific model, but it was likely a circa-2014 workstation series, my best guess
is Quadro K620.


> Recent Windows builds of X2GoClient allow you to select a custom install
> that drops an x2goclient.debug.exe next to the regular one.
> If you're willing to assist, try running that and see if it generates
> more verbose output.

I recently completed the appointment at my last employer, so I no longer have
access to that machine (and am following up using personal email).
At the moment, I don't have a comparable system that I can try reproducing the
issue on, but I'll keep your suggestion in mind for any debugging with the
installer build.

Christopher Chavez


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