X2Go Bug report logs - #1390
x2go server openGL errors are printed in high volume at less than a millisecond time-scale to the log file

version graph

Package: x2goserver; Maintainer for x2goserver is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goserver is src:x2goserver.

Reported by: Piotr Balwierz <balwierz@gmail.com>

Date: Sun, 26 May 2019 11:15:02 UTC

Severity: normal

Found in version 4.1.0.3-4

Full log

Message #10 received at 1390@bugs.x2go.org (full text, mbox, reply):

Received: (at 1390) by bugs.x2go.org; 28 May 2019 21:32:22 +0000
From ulrich.sibiller@gmail.com  Tue May 28 23:32:20 2019
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on
	ymir.das-netzwerkteam.de
X-Spam-Level: 
X-Spam-Status: No, score=-0.7 required=3.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,FREEMAIL_REPLYTO,
	FREEMAIL_REPLYTO_END_DIGIT,SPF_HELO_NONE,URIBL_BLOCKED autolearn=no
	autolearn_force=no version=3.4.2
Received: from localhost (localhost [127.0.0.1])
	by ymir.das-netzwerkteam.de (Postfix) with ESMTP id 123005DAF6;
	Tue, 28 May 2019 23:32:20 +0200 (CEST)
X-Virus-Scanned: Debian amavisd-new at ymir.das-netzwerkteam.de
Received: from ymir.das-netzwerkteam.de ([127.0.0.1])
	by localhost (ymir.das-netzwerkteam.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id nK4-Iwb_Pce8; Tue, 28 May 2019 23:32:13 +0200 (CEST)
Received: from mail-vs1-xe2b.google.com (mail-vs1-xe2b.google.com [IPv6:2607:f8b0:4864:20::e2b])
	by ymir.das-netzwerkteam.de (Postfix) with ESMTPS id EE5815DA26;
	Tue, 28 May 2019 23:32:12 +0200 (CEST)
Received: by mail-vs1-xe2b.google.com with SMTP id z11so295285vsq.9;
        Tue, 28 May 2019 14:32:12 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:references:in-reply-to:reply-to:from:date:message-id
         :subject:to:cc;
        bh=VOBLlZMoG2eBiPSfoCyuE2rtji8YuI2PR/fMwD8lDOw=;
        b=Z5/sTas7vWScMS9tcLnWwkLaFcZkyNEzKmXGoNDo8Bmvjg8+eW97DAGkgccIdlyQEp
         YV3UwTjc1QvGtPlw2LCG+96JUH4FEE0AABceAJom1HI7WvopztM8uARGZCGmTL/5l5vU
         mUJGw5p/sFOAMhGl24Df+nRVjMicMwhhw2F784lQnAfvyLFLd150E7Rq81DSgWIB0f+p
         hcktJCx0n3NgjuN+aUbKhppSkLlU5nwrJPI67UTtiJYsZS2cWtz/1mRQytUIe0XFURxK
         3gLCOR4zzGSEgawPVlYnE8Z+4g12RsOy5UcZ6SO9HFnQQfhqvbPegfpVfhMDnAW6zHrU
         Oufg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:references:in-reply-to:reply-to
         :from:date:message-id:subject:to:cc;
        bh=VOBLlZMoG2eBiPSfoCyuE2rtji8YuI2PR/fMwD8lDOw=;
        b=uYV/ezBItZi3LKB55mC97ZF8aL851PR3MiLtuotMjiLp0IZx29so6im0pyYEZ4pa1g
         IxcqYB3fPyMvb8yExVKsmBHWMB/HinyJUy63tLS1xL0suFrnMl9kJgr4N6B/0JM1m0mc
         21c/A8CQ4f9D9JVWeBoLr3k/ke2c4W11VUT5GDRzOELHslWBK37QlytvRF7b69PsLLfR
         F1KZlWS959tMux3im0LsWnZsCE1w1YqqDDGiMochkMltnh7PJRW8LDMrkhkV9fzXCRO1
         eW+xln2hLI+FRaWXl5DpzHYCT/mDy8ejCF7PXckN+qTPf8IDjI4GD7cubtn7Fugg6vGL
         1Quw==
X-Gm-Message-State: APjAAAUOSM7HNfn9EScgFq3hdILmKHKXgzf3oAHmgl0Isc3h7a/drGEr
	EoSwUkvQRqPJG6pqdPChK0/4awo4f++cksSmBWw=
X-Google-Smtp-Source: APXvYqxFnTp2h3ruwkdungNc2feAQNai2OpKH4AlWQh9swihDu+R0q6XFo3rypQbrhf08FX33kLP9IvS57qJWXEKi2I=
X-Received: by 2002:a67:c111:: with SMTP id d17mr54631991vsj.176.1559079131723;
 Tue, 28 May 2019 14:32:11 -0700 (PDT)
MIME-Version: 1.0
References: <4f3080f7-5aa6-d6f3-724d-5a65c56cd737@gmail.com>
In-Reply-To: <4f3080f7-5aa6-d6f3-724d-5a65c56cd737@gmail.com>
Reply-To: uli42@gmx.de
From: Ulrich Sibiller <ulrich.sibiller@gmail.com>
Date: Tue, 28 May 2019 23:31:45 +0200
Message-ID: <CANVnVYL1ACAC8xBt+KpzUQqfrYfLX7xGcjWiEWsdT9SdT-EASA@mail.gmail.com>
Subject: Re: [X2Go-Dev] Bug#1390: x2go server openGL errors are printed in
 high volume at less than a millisecond time-scale to the log file
To: Piotr Balwierz <balwierz@gmail.com>, 1390@bugs.x2go.org
Cc: submit@bugs.x2go.org
Content-Type: text/plain; charset="UTF-8"

On Tue, May 28, 2019 at 10:58 PM Piotr Balwierz <balwierz@gmail.com> wrote:
>
> Package: x2goserver
> Version: 4.1.0.3-4
>
> Debian Buster
>
> OpenGL error messages from gl_surface_qt.cpp (qtwebengine likely) are printed on 0.01 of a millisecond time scale (i.e. 10^5 messages per second) to a log file.
> Currently my log file is 16 TB in size. This is a error log file from a single session, because https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=923 is resolved.
>
> $ls -la ~/.xsession-x2go*
> -rw------- 1 user users 17557623775232 May  2 23:40 .xsession-x2go-mamut-errors
> -rw------- 1 user users          38176 Jun 18  2018 .xsession-x2go-mamut-errors.old
>
>
> The content of the file is extremely boring:
> [...]
> [51916:52005:0422/215628.936583:ERROR:gl_surface_qt.cpp(296)] eglCreatePbufferSurface failed and surfaceless context not available
> [51916:52005:0422/215628.936597:ERROR:gl_surface_qt.cpp(303)] Requested OpenGL implementation is not supported. Implementation: 0
> [51916:52005:0422/215628.936612:ERROR:gl_surface_qt.cpp(296)] eglCreatePbufferSurface failed and surfaceless context not available
> [51916:52005:0422/215628.936627:ERROR:gl_surface_qt.cpp(303)] Requested OpenGL implementation is not supported. Implementation: 0
> [51916:52005:0422/215628.936642:ERROR:gl_surface_qt.cpp(296)] eglCreatePbufferSurface failed and surfaceless context not available
> [51916:52005:0422/215628.936656:ERROR:gl_surface_qt.cpp(303)] Requested OpenGL implementation is not supported. Implementation: 0
> [...]

The .xsession-errors file contains stderr of your applications run
within the session. Your application tells you via stderr it is not
supporting the OpenGL implementation X2go offers. Bad Luck. Do these
workarounds help?:
- run <your app> 2>/dev/null from an xterm and see if that helps.
- try running you application without OpenGL support.
- try if this workaround can help you:
https://wiki.x2go.org/doku.php/wiki:development:glx-xlib-workaround?s[]=libgl

> Expected behaviour: Too quickly appearing messages from the same process should not end up in the log file. systemd-journald if I am correct has such a feature.
> I am not reporting it to qtwebengine or Rstudio right now. Will do if encouraged in your comments.

Well, it is your application producing errors at a high frequency. It
shoudl be fixed there. (BTW: It would happen in a normal X session,
too.)

Uli

Send a report that this bug log contains spam.

X2Go Developers <owner@bugs.x2go.org>. Last modified: Mon Oct 27 03:46:57 2025; Machine Name: ymir.das-netzwerkteam.de

X2Go Bug tracking system

Debbugs is free software and licensed under the terms of the GNU Public License version 2. The current version can be obtained from https://bugs.debian.org/debbugs-source/.

Copyright © 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson, 2005-2017 Don Armstrong, and many other contributors.