From unknown Tue Apr 21 08:42:48 2026 X-Loop: owner@bugs.x2go.org Subject: Bug#516: [X2Go-Dev] Bug#516: X2go successfully connects to server, but no window is shown Reply-To: Mihai Moldovan , 516@bugs.x2go.org Resent-From: Mihai Moldovan Resent-To: x2go-dev@lists.x2go.org Resent-CC: X2Go Developers X-Loop: owner@bugs.x2go.org Resent-Date: Fri, 20 Jun 2014 15:15:02 +0000 Resent-Message-ID: Resent-Sender: owner@bugs.x2go.org X-X2Go-PR-Message: followup 516 X-X2Go-PR-Package: x2goserver X-X2Go-PR-Keywords: Received: via spool by 516-submit@bugs.x2go.org id=B516.140327703321108 (code B ref 516); Fri, 20 Jun 2014 15:15:02 +0000 Received: (at 516) by bugs.x2go.org; 20 Jun 2014 15:10:33 +0000 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on ymir.das-netzwerkteam.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_DKIM_INVALID autolearn=ham version=3.3.2 Received: from Root24.de (powered.by.root24.eu [91.121.15.64]) by ymir.das-netzwerkteam.de (Postfix) with ESMTP id EB3215DB3E for <516@bugs.x2go.org>; Fri, 20 Jun 2014 17:10:31 +0200 (CEST) Received: from nopileos.local (home.ionic.de [85.183.67.131]) by Root24.de (Postfix) with ESMTPSA id D493D3B005CF; Fri, 20 Jun 2014 17:10:30 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=ionic.de; s=default; t=1403277031; bh=ylJ6K8nkGt4LF0x5TM20qRh87/t+9xSQGHva78KYhDA=; h=Date:From:To:Subject:References:In-Reply-To:From; b=d5hTubRZwYth9Yg54hLjrHv9TNe3zDiqRV1+DGQUzzeHgTp2q+GcxH6V6/gu+YaPt iQ8sd7fMNDRwtUs06yucnN6YT42bUZMi3ttEaAZgcYecrYKpWnWt4L/j8it/66dzFp YetHJmZUPyt0OtEyGkzhlCdLnY1dqCXmXVxjBMi4= Message-ID: <53A44EE8.0@ionic.de> Date: Fri, 20 Jun 2014 17:10:32 +0200 From: Mihai Moldovan User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: 516@bugs.x2go.org, sebastien chabrolles References: <20140614224852.Horde.1aAwQpnldGt0QLLA8da6Wg1@mail.das-netzwerkteam.de> <539D1931.2090106@ionic.de> In-Reply-To: <539D1931.2090106@ionic.de> X-Enigmail-Version: 1.6 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms080807000400070104030005" This is a cryptographically signed message in MIME format. --------------ms080807000400070104030005 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi, Well, I have done quite some work. The xkbcomp issue I've been seeing seems to be normal - other machines be= have the same. It was a missing directory (keymaps.dir) in /usr/share/X11/xkb = on my x86_64 machine that prevented xkbcomp from being called and a root-non-ro= ot issue regarding the file location (/var/tmp/server-$DISPLAYNO.xkm vs. compiled/server-$DISPLAYNO.xkm.) Alas, none of these were critical or actually had any influence on the X = server as such. Both machines produces the same messages. So xkb was totally the= wrong thing to look at. I have then compiled with even more debug info in nxproxy and nxagent to = see whether the problem is in the connection part between two machines. I even straced the nxagent/x2goagent process to get some useful informati= on out of there. After going through a several megabytes big strace file, I ende= d up seeing that both ppc64 and x86_64 are behaving the same establishing the connection and everything is functional. Bummer, nothing on that front ei= ther. There's no indication of what may be wrong. Not even with nxagent (being = the X server itself) compiled with -DDEBUG -DDEBUG_CMD -DNX_TRANS_TEST. This pr= oduces quite a lot of messages every once in a place, but there's nothing regard= ing being unable to create/show windows. Not even starting another application from a shell via DISPLAY=3D: xeyes bring's anything to li= ght. At least X clients (programs) and server are constantly exchanging inform= ation, so the missing window issue must be nested deep within the X server itsel= f. However, I have no idea where to look. To make matters worse, attaching gdb to nxagent during normal operation i= s quite impossible. As soon as nxagent is stopped for single-stepping through fun= ctions and examining variables/code in detail, the (remote) nxproxy client will = get a timeout as it's not able to communicate with the agent anymore (well, sur= e, we've just been stopping that for debugging...) and close the connection.= Pretty much the only way possible is print-debugging in the code. I could live with that, had I at least any idea of where the problem coul= d be. Maybe finding the code drawing/creating a window would be interesting. --- In other news, I can report that outgoing connections via x2goclient are = working just fine. I've been connecting to my ionic.de machine in order to start = a simple xterm from the ppc64 box and that worked flawlessly. How wouldn't = it, as "this way 'round" doesn't use the very old X server distributed with NX, = but actually the recent, known-to-work X server as shipped with Fedora. Thus, it's really just a server-side issue. 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