x2go-dev March 2010

x2go-dev@lists.x2go.org

9 participants
18 discussions

x2goclient and ssh-agent
by Heiko Baumann 29 Jun '11

29 Jun '11

Hello, is there a way to use x2goclient with ssh-agent(1)? i am using ssh-agent with my etoken to login via nxclient on some machines. is this possible with x2goclient? i've started x2goclient from the same shell where a ssh login to the remote server worked with agent auth. but x2goclient seems not to use the running ssh-agent. thanks for any help. heiko

6 17

Desktop sharing
by Peter Puk 08 Jun '10

08 Jun '10

As described here: http://www.x2go.org/index.php?id=72 Quote: "You may share their displays to help them or to discuss your projects." How can i share a desktop, or as i understand: "login to an already running desktop, to support the current working user." In what way can i manage that. I'm already to access the "server" and login to another user, but not take over an existing session. Ronnie

8 9

Opening a session to user with encrypted home directory
by Milan Knížek 28 May '10

28 May '10

Hello, there appears to be a problem with connecting to x2goserver-home (Ubuntu 9.10), when the user has encrypted home directory (using ecryptfs). The cause seems to be that some files need to be open in the home directory before the ecryptfs is mounted. Trying to connect again usually works. Also, the unsuccessful first session remains hanging as "running" in the server's database. I checked that after the first unsuccessful trial, the ecryptfs home directory was not mounted. Could it be caused by not enough time for ecryptfs mounting scripts to mount home directory before x2go wants to write to it? Log of the first session: /usr/bin/x2goagent: řádek 1: -e: command not found NXAGENT - Version 3.4.0 Copyright (C) 2001, 2007 NoMachine. See http://www.nomachine.com/ for more information. Info: Agent running with pid '16895'. Session: Starting session at 'Tue Jan 26 22:02:19 2010'. Loop: PANIC! Can't open options file '/home/modeluser/.x2go/C-modeluser-90-1264539738_stDGNOME_dp32/options'. Error is 2 'No such file or directory'. Error: Can't open options file '/home/modeluser/.x2go/C-modeluser-90-1264539738_stDGNOME_dp32/options'. Error is 2 'No such file or directory'. Error: Parsing of NX transport options failed. _X11TransSocketConnectConnInfo: Cannot create the NX transport. Loop: WARNING! Signal 'SIGINT not installed in process with pid '16895'. Warning: Signal 'SIGINT not installed in process with pid '16895'. Loop: WARNING! Signal 'SIGTERM not installed in process with pid '16895'. Warning: Signal 'SIGTERM not installed in process with pid '16895'. Loop: WARNING! Signal 'SIGHUP not installed in process with pid '16895'. Warning: Signal 'SIGHUP not installed in process with pid '16895'. Loop: WARNING! Signal 'SIGCHLD not installed in process with pid '16895'. Warning: Signal 'SIGCHLD not installed in process with pid '16895'. Error: Aborting session with 'X2goagent: Unable to open display 'nx/nx,options=/home/modeluser/.x2go/C-modeluser-90-1264539738_stDGNOME_dp32/options:90''. Session: Aborting session at 'Tue Jan 26 22:02:19 2010'. Session: Session aborted at 'Tue Jan 26 22:02:19 2010'. Loop: WARNING! Signals were not blocked in process with pid '16895'. Warning: Signals were not blocked in process with pid '16895'. NXPROXY - Version 3.4.0 Copyright (C) 2001, 2007 NoMachine. See http://www.nomachine.com/ for more information. Info: Proxy running in server mode with pid '16895'. Session: Starting session at 'Tue Jan 26 22:02:19 2010'. Loop: PANIC! Call to bind failed for UNIX domain socket (null)/.X11-unix/X90. Error is 2 'No such file or directory'. Error: Call to bind failed for UNIX domain socket (null)/.X11-unix/X90. Error is 2 'No such file or directory'. Session: Session terminated at 'Tue Jan 26 22:02:19 2010'. Milan Knizek knizek (dot) confy (at) volny (dot) cz http://www.milan-knizek.net - About linux and photography (Czech language only)

1 1

upcoming release
by Heinz-M. Graesing 12 Apr '10

12 Apr '10

Dear x2go users, for the last months we've been working on a new release. First we thought to bring some new features, but now we'll bundle it, because there where many changes needed. It still will take some time to the release, but we wan't to inform you on some changes we are discussing. First of all: We are planing a multi session x2goclient for the release after the next release. So there will be a lot of work of redesigning our clients. This would be easier with only one client architecture and as the Qt client is our base for the Linux, Windows, Maemo and Mac OSX platforms, we are asking the question: Would it be ok to focus our work on the Qt client and to stop/reduce our work on the GTK client? If we would go on developing both clients equally, it will really take a long time to implement all new planned features and this will slow down the whole project. The Question can also be transformed: Is there anybody interested to help us to keep the GTK client up to date? Please tell us your thoughts but keep in mind, that the Qt Toolkit is available on all major distros and we'll keep on developing our Gnome bindings. This will not be a preconfigured "choice of Desktop Environment". So we think we should now continue with some of the new features of the next release (as a contrast): Yes, there will be a Browser Plugin. It will be realized as a "sponsored development" so we'll get some money for our work and the sponsor will be named. You'll be able to integrate the plugin into a Website and you'll have all features of the x2goclient. Yes there will be a "session sharing" option without the need of a LDAP server. The new "session sharing" option will make it possible to share a x2go session with another user, to share a already started xorg session with another user and to share a session with more than one user. There will be a system tray application which will help configuring the sharing settings. After getting so many mails about a wiki for documentation - yes we are working on a wiki which will replace the odf/pdf/html manuals. We are looking for new localisations. If x2goclient is not available in your language and you want to translate it, please let us know (on the list ). We'll provide a *.ts file for your language (qt-linguist). We'll announce the the release here on the list and on our blog - at the moment we can't tell you when it'll be ready. So please stay tuned and tell us what you think about the news... best regards, Heinz and Alex

7 8

SSH Key issues
by John A. Sullivan III 25 Mar '10

25 Mar '10

Hello, all. We recently recreated an X2Go Server and found we had serious ssh key issues when we tried to connect from the previously existing X2Go clients. We're still working these through so I'll list them in the order we find them. The GUI key popping up Accept Key dialogs with Yes and No options but no text. It was only when we canceled that we saw the error message about there being an old, conflicting key. By the way, we use both hashed known_host files and non-default ssh ports. This created a problem when we went to remove the offending keys in that the syntax ssh-keygen -R <server name> did not work. We needed to use ssh-keygen -R [<server name>]:<port number> (note the brackets). We then hit a problem where the X2Go Client for some reason started trying to open an SSH sessions as root. Since we use active host intrusion detection (OSSEC), the failed login attempts lock out the user and the screen stops at the X2Go logo. Oops! This was our misunderstanding of the auth.log. The problem was that our users are only defined in LDAP. We configured pam to look at pam_unix first. This tripped our HIDS and blocked our users. From our internal documentation: Now we need to fix some pam files. It is critical that the ldap modules are processed first even though that is non-standard. In the X2Go environment, many ssh sessions are fired off in quick succession. Since the pam_unix authentications fail for the LDAP users (as they are not defined locally), all the failed authentications trip the OSSEC auto-response and block the user from access to VD01. Thus, LDAP credentials MUST be processed first. This just leaves the empty dialog box. Thanks - John

2 3

DPI problem and Gnome
by Paul van der Vlis 23 Mar '10

23 Mar '10

Hello, I found out there is a "DPI" setting in Gnome. The default setting is not always the same. You can find the setting here: system | preferences | appearance | fonts | button "details" (rough translated from Dutch in English) Not sure this solves the problem completely. With regards, Paul van der Vlis. -- http://www.vandervlis.nl/

1 0

Fullscreen mode in Windows not working
by John A. Sullivan III 22 Mar '10

22 Mar '10

Hello, all. I've been testing X2Goclient 3.0.1-4 for Windows on two separate computers running WindowsXP. I'm seeing the same problem on both. I set the session mode to full screen and yet the session opens to some less than full screen geometry with Window decorations. I have ensured the old sessions were not running so it was not inheriting old geometry. Is this a bug or am I doing something wrong? Thanks - John

2 3

Out of order key strokes
by John A. Sullivan III 20 Mar '10

20 Mar '10

Hello, all. I've been observing a serious issue with enough consistency that I'll report it. On highly congested links, we are noticing that keystrokes are delivered out of order. I do not know the internals of NX or even what its underlying transport is. It almost appears as if every keystroke is a packet as it is with telnet and the packets are being processed in their out of order sequence. I would think that SSH over TCP would handle packet ordering problems. When severely congested, the typing speed on the remote desktop becomes very lagged but, if one types far enough ahead, the far end of the buffer is played out of order particularly when there are the same characters close to each other (perhaps a compression bug? we have not done enough observation on that to state it dogmatically). For example, I don't know how many times today I typed something like "shared database in a complete" and had it come out "sharedd ataabse ina compleet" (in case that is displayed across a line break, there are two spaces between ataabse and ina). This can be exasperating to our clients when links are congested. It's one thing to have to wait for the display while it's another to see the display display something other than what was typed :-) Thanks - John

1 0

Old session directories
by John A. Sullivan III 14 Mar '10

14 Mar '10

I'm noticing we are building up quite a collection of old session directories (S- and C- directories under ~/.x2go). Is there any reason why we keep these and don't delete them once the session is terminated? Thanks - John

1 0

Working on x2goclient code
by John A. Sullivan III 14 Mar '10

14 Mar '10

Hello, all. I'm both trying to deeply understand the workings of X2Go and trying to troubleshoot a problem we are having with SSH keys after replacing an X2Go Server. >From where does one checkout the repository? I'm not that used to Berlios and it didn't jump out at me. I did download the 3.01-4 tarball and tried to run it on my default Lenny installation of KDevelop. It complains that QtDesigner is too old. It's also complaining about paths when I try to run the debugger. Any tips for getting set up to work on the Qt code? Thanks - John

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x2go-dev March 2010