x2go-user March 2012

x2go-user@lists.x2go.org

24 participants
46 discussions

Re: [X2go-User] Mac client 'Can't connect to X-Server
by Neil Hunt 14 Nov '12

14 Nov '12

Paul, Unfortunately as a regular user of the Mac X2go client, this is something I've seen many times. Unfortunately, I haven't found any fix for it. The good news is that it rarely happens if you keep the X11 application open. Always open X11 before starting your X2go session. From there, you can stop/start X2go sessions, even the X2go client itself, however I almost always keep my X11 app running even when it's not being uses and then I don't get the problem you are describing. If I quit X11, especially if it's accidental during an active X2go session, then I end up with the problem you are describing and the only option is to restart the whole computer. But if I keep it open, I go for days or weeks without rebooting. Ultimately, I think we should look to move to the PyHoca gui, but we haven't been able to find any serious python developers to port it to OS X. Neil -------------------------------------------------------------------------------------------- Date: Wed, 6 Jul 2011 12:14:51 -0700 From: Paul Northug <pnorthug(a)gmail.com> To: x2go-user(a)lists.berlios.de Subject: [X2go-User] Mac client 'Can't connect to X-Server' Message-ID: <CAJAeRZy=KmQsVyoELQ4MrTDHZ8g03x8tXJm_hTL5NK50jQ9QEw(a)mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Thank you to the developers for make this excellent software. Many people at my work use x2go's Mac client. We have never been able to figure out how to resolve the 'Can't connect to X-Server' error without random acts (eg. rebooting). We are not sure why it comes up. This is what I do: 1. Start X11.app 2. ssh -X remotehost 3. xterm & So far this works, I get an xterm so there is nothing wrong with X11 4. Start X2Go client 5. Start a session (port 22, dsa authentication, Gnome...) 6. Client gives the error and hangs (Abort and Terminate don't do anything) and I have to close the application. The closest we got to figuring it out is that the X11.app possibly changes it's DISPLAY on restarts and perhaps the x2go client is expecting display 0. Is there any more debugging information that I could get from the client to see what exactly it is doing prior to giving the error message? We have tried some of the suggestions in the forums, such as changing permissions in X11.app (this is necessary), starting it manually before starting the client. We have also done things like messed with firewall settings, made sure hostname doesn't change on our laptops between work and home, deleted preference files, delete XAuthority files, etc. What seems to work is rebooting. Thanks, P?l

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xming 6.9.0.31 keeps crashing
by nigra truo 21 Sep '12

21 Sep '12

Hi, I use x2go a lot on Windows, but have noticed that the xming server keeps crashing from time to time, usually when I seem to have firefox open in the session with lots of tabs. It takes me usually some effort to close the tabs, as it keeps crashing and crashing. Is there a workaround for this? This is with X2go client 3.01-2 on Windows. I know this is an old version of X2go, but when trying the new version, they both fail on Linux and Windows with the error "cannot open X screen" or something. (do I have to upgrade the x2go server too, might that be the problem to be able to use the new client? I depend on x2go and use it long hours every day so breakage is annoying) Thanks, Markus

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(TCE) Problem open display
by Torsten Bade 26 Apr '12

26 Apr '12

Hi all, I have actually the problem to connect via TCE to the server (fresh install), when I use the normal Client under e.g. Ubuntu, there is no problem, I can connect, work etc. The problem itself is only with TCE and I'm running in circles. System Ubuntu 10.04 amd64, Gnome x2goserver/xsession: 3.1.0.1 x2gognomebindings: 2.0.1.3 Client boot up via pxe, everything perfect ... but then, when I try to connect: I get the popup Message : Connection failed head: cannot open /home/<username>/.x2go/C-XXXXXXXXXXX_stDGNOME-dp32/cmdoutput' for reading: No such file or directory sed: -e expression #1, char 4: unterminated 's' command. When I say 'Show details' I get: --->> SNIPP Show details <<--- Proxy running in client mode with pid xxx Session: Starting session at xxx Info: Connecting to remote host 'localhost:31252'. (Here I was confused about localhost) Connection timeout, abortingInfo: Aborting the procedure due to signal '15'. --->> SNAPP Show details <<--- --->> SNIPP User Session.log <<--- running as X2Go Agent NXAGENT - Version 3.5.0 Copyright (C) 2001, 2011 NoMachine. See http://www.nomachine.com/ for more information. Info: Agent running with pid '8932'. Session: Starting session at 'Fri Mar 16 18:28:17 2012'. Info: Proxy running in server mode with pid '8932'. Info: Waiting for connection from 'localhost' on port '30126'. Info: Aborting the procedure due to signal '1'. Error: Aborting session with 'Unable to open display 'nx/nx,options=/ofs/logon/torba/.x2go/C-torba-50-1331918896_stDGNOME_dp24/options:50''. Session: Aborting session at 'Fri Mar 16 18:28:50 2012'. Session: Session aborted at 'Fri Mar 16 18:28:50 2012'. --->> SNAPP <<--- I was so confused, that I added now the line: allowed_users=anybody into /etc/X11/Xwrapper.config ... but nothing I can connect via ssh -X to the server and get for e.g. libreoffice displayed on my local machine. I tried different users ... nope ...same. Hopefully somebody have a hint :) Thanks in advance Torsten

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Ubuntu Unity errors (11.10 and 12.04 beta 1)
by christoffer krakou 18 Apr '12

18 Apr '12

Hello there people I'm using x2go, and so far i'm loving it. there is one thing, though, that iffs me. When i'm using unity on ubuntu, the top global menu bar dosnt work like it does locally. On my local install, i can click the menu items, no problem. On the x2go session, i need to click and hold down the mouse button before i can use the menus, "letting go" when i activate a menu entry. Does anyone have any experience with this? Thanks in advance -- Venlig Hilsen / Best Regards Christoffer Krakou Fleten.net APS

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x2goserver on vserver guest
by Adèlphe Rafanambinana 31 Mar '12

31 Mar '12

Hi all, I'm using x2go on Ubuntu, and it works well. Starting this week, I'd like to install it on Alpine Linux ( www.alpinelinux.org) which is installed inside a vserver. (There is an x2goserver package for Alpine Linux in edge repository). x2goserver and its dependencies are installed correctly. But when I try to run x2goclient which is installed on my windows desktop, I got the attached error. Do you have an idea for it? I was wondering if it could be related to fuse module, since it coulodn't loaded in vserver guest. Any comments are welcome!, Thank you, Adèlphe Rafanambinana

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X2Go on wheezy Xen DomU
by Mirco Schmidt 29 Mar '12

29 Mar '12

Hi all, this is my first Msg to the list. I've setup x2go on one of my DomU's, it's running wheezy with the latest update's. I can connect to KDE, but can't to LXDE and GNOME. But that's not the main prob… I can't continue session's, all I see is a greyed continue button. Client is running on Mac OS X 10.7.3 with modified lib's from a NX… Hope you can gi'me a hand to find a solution! Greetz Mirco

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Re: [X2Go-User] Few questions with Windows client
by Scott Balmos 29 Mar '12

29 Mar '12

Do you happen to remember what was the latest version before the libssh move? I'll gladly check if there's an old build laying around somewhere. Sent from my ASUS Eee Pad "John A. Sullivan III" <jsullivan(a)opensourcedevel.com> wrote: >On Mon, 2012-03-26 at 20:44 -0700, John Williams wrote: >> On Mon, Mar 26, 2012 at 1:58 PM, Scott Balmos <sbalmos(a)fastmail.fm> wrote: >> <snip>> >> > 2) More interestingly, I have Pulseaudio set to SSH tunnel, for the random >> > time where I want audio playing over from my VM. Depending on the phase of >> > the moon, I will hear the first tenth of a second of the KDE startup music, >> > then nothing. Same with a song played in Amarok. Looking into the audio >> > settings, the remote Pulseaudio server seems to drop off the valid devices >> > list. I imagine Pulseaudio has lost the connection with the remote server on >> > the Windows client. I don't know if it's a tunneling issue or not. Obviously >> > everything works perfectly fine if there are no firewalls involved (e.g. I >> > have my laptop at home, accessing the home VM locally). >> > >> > Any ideas, or pointers on what to debug where to provide more info? Thanks! >> >> Those are two long existing bugs in the Windows client. I use the >> following workarounds, but they are ugly: ><snip> >> 2) I disable the "Use ssh port forwarding to tunnel sound..." option. >> Of course, this will not work if your connection is going through a >> firewall. ><snip> >I believe sound used to work fine in the older clients. I wonder if >something broke in the the move to libssh. We have a number of issues >that seem to have degraded in the newer clients and they appear to all >be ssh related - John >

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Re: [X2Go-User] x2go Rocks! - just think of next steps...
by brian mullan 29 Mar '12

29 Mar '12

nigra... now that you have x2go working. Here is something else to add to the mix. you want a "cloud" desktop but it has to support linux & windows. in the cloud (I use aws's ec2) create a linux desktop server. (I use ubuntu) I create an ubuntu server instance on AWS's EC2 cloud by: - ssh into the instance - install a default ubuntu desktop (apt-get install ubuntu-desktop) - add the x2go ppa sudo add-apt-repository ppa:x2go/stable - refresh the repository cache (debian/ubuntu) sudo apt-get update - install x2go server sudo apt-get install x2goserver - add yourself to the x2gouser group sudo adduser <yourID> x2gouser after that ... you should be able to go back to your local machine and start your x2goclient and point it to your AWS EC2 cloud PUBLIC IP address and get to logged-in. BUT... what if you want Windows apps too.. On the "cloud" x2goserver think about setting up FreeRDP (http://www.freerdp.com/) In whatever "cloud" you use... start a Windows 2008 v2 server. - On that Windows server as Admin ... - install and setup whatever RemoteApp applications you want - and publish them <http://www.youtube.com/watch?v=Nf20-76dMcg>. (demo'd at UDS in Orlando http://www.youtube.com/watch?v=Qnh7f36xkRA and I've done it locally myself to aws servers) Back on your Linux/Ubuntu machine use FreeRDP to execute the Windows "RemoteApp" application. Big picture... - you are on a remote pc/laptop/tablet etc running an x2goclient - you connect to your "cloud" x2goserver machine and login - your login has a menu or some desktop icons that when clicked - uses FreeRDP to execute the Windows Apps off of the Windows "cloud" server as just another xwindow. - That uses the RDP protocal. But since its all "intra-cloud" between instances (the windows cloud instance and the linux/ubuntu cloud instance) - the I/O is very high bandwidth (on AWS it would be 1-10Gbps) links. - Now since you (the x2go client) are remotely connected to the "cloud" linux/ubuntu server and utilizing the great compression of x2go/nx - the remote windows & linux apps "appear" to have the same good performance. Lastly, because freerdp lets the windows apps appear as just "any other" linux app the end user only has one "look-and-feel" etc to deal with which can be a big issue in end-user training and acceptance with just a single desktop & user interface. Brian ---------- Forwarded message ---------- From: nigra truo <nigratruo(a)gmail.com> To: x2go-user(a)lists.berlios.de Cc: Date: Wed, 28 Mar 2012 18:44:25 -0700 Subject: [X2Go-User] X2go rocks! Hi, I just wanted to say thank you for the great thing that X2Go has become. I use it on a daily basis on several systems and could not think how I would work anymore without it. It provides a functionality that I have looked for so many years, but could never find. I always thought that a Linux server would be perfect to be used as a terminal server, but was always amazed and confused at the total lack of any application that provided this functionality. Then, Windows RDP came along and I did not understand how Linux with X and that network-ability of it failed to provide something similar. And finally, we got it! I hope that X2Go will find it's way into all Linux Distros. I wish there was a CentOS and RedHat package so I could load it onto each customers machine that I have to support, instead of having to use sucky VNC or putty or be limited to using a remote shell, instead of the rich GUI experience that KDE and Gnome can offer. In spreading the word, I wrote a blog about my great experience and what X2Go can do. http://browny-amiga.livejournal.com/7167.html Thanks again for all the hard work in making X2Go a reality, you guys rock! Markus

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Composite extension
by Ralph Sikau 29 Mar '12

29 Mar '12

Hi, we connect to a gnome session on a x2go host. This gnome session has cairo-dock installed which unfortunately cannot make use of the composite function included in metacity for real transparency. When I start xcompmgr it says "no composite extension". The x2go windows client uses vcxsrv which is supposed to be even opengl capable. Where is the handicap here? Best, Ralph

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x2go server & client on Ubuntu 12.04 beta fails
by brian mullan 29 Mar '12

29 Mar '12

I have not been able to get x2go server/client to work on Ubuntu 12.04 client/server machines. I installed the x2go ppa for ubuntu sudo add-apt-repository ppa:x2go/stable I installed on the server the x2goserver: sudo apt-get install x2goserver on the client I installed the x2goclient: sudo apt-get install x2goclient On ubuntu 12.04 I have installed the 'fallback' gnome desktop support but in previous versions both Unity or gnome worked. Now when attempting to start an x2go client session (see below): ssh connection gets established public/private keypair are generated search for proxy starts session aborts/terminates Anyone got any ideas what the problem might be or how I can troubleshoot further? Brian ============================================================== bmullan@myPC:~$ x2goclient ONMainWindow constructor Can't load translator (:/x2goclient_en_us) ! Can't load translator :/qt_en_US ONMainWindows constructor finished, home Directory is: "/home/bmullan" read 2 sessions from config file start new ssh connection to server: " ec2-107-20-19-100.compute-1.amazonaws.com" : "22" krb: false ssh connection ok continue normal x2go session "x2gostartagent 800x600 wan 16m-jpeg-9 unix-kde-depth_24 us pc105/us 1 D GNOME" Agent output: "54 3339c5586e14c274ad523e1eb356d10b 16688 bmullan-54-1333005451_stDGNOME_dp24 30001 30002 30003 " starting nxproxy with: "nxproxy -S nx/nx,options=/home/bmullan/.x2go/S-bmullan-54-1333005451_stDGNOME_dp24/options:54" " NXPROXY - Version 3.5.0 Copyright (C) 2001, 2010 NoMachine. See http://www.nomachine.com/ for more information. Info: Proxy running in client mode with pid '18508'. Session: Starting session at 'Thu Mar 29 03:17:35 2012'. Info: Connecting to remote host 'localhost:31001'. Info: Connection to remote proxy 'localhost:31001' established. " search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" "Info: Connection with remote proxy completed. Warning: Unrecognized session type 'unix-kde-depth_24'. Assuming agent session. " "Info: Using WAN link parameters 768/24/1/0. Info: Using cache parameters 4/4096KB/8192KB/8192KB. Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_24'. Info: Using ZLIB data compression 1/1/32. Info: Using ZLIB stream compression 1/1. Info: No suitable cache file found. Info: Forwarding X11 connections to display ':0'. " "Session: Session started at 'Thu Mar 29 03:17:36 2012'. " search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" "Info: Established X server connection. " Generating public/private rsa key pair. Your identification has been saved in /home/bmullan/.x2go/ssh/gen/key.T18497. Your public key has been saved in /home/bmullan/.x2go/ssh/gen/key.T18497.pub. The key fingerprint is: cc:23:10:15:e3:bd:3e:86:ee:7f:02:be:6f:d2:ef:a4 bmullan@DadsPC The key's randomart image is: +--[ RSA 1024]----+ | ..+. | | o o | | . . . | | . o . | | . S | | .+ . | | ..o+ . | | .o.++. | | .+*E=o | +-----------------+ key created on: "/home/bmullan/.x2go/ssh/gen/key.T18497" starting fs tunnel for: "bmullan-54-1333005451_stDGNOME_dp24" fs port: "30003" search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" exported key "/home/bmullan/.x2go/ssh/gen/key.T18497" key removed search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" "Info: Using shared memory parameters 1/2048K. " search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" search proxy win: "X2GO-bmullan-54-1333005451_stDGNOME_dp24" proxy win found: 73400416 "Session" ": Terminating session at 'Thu Mar 29 03:17:39 2012'. Session: Session terminated at 'Thu Mar 29 03:17:39 2012'. " deleting proxy nxproxy not running proxy deleted check command message close event ^C bmullan@myPC:~$

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x2go-user March 2012