x2go-dev

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5397 discussions

SSH and Performance
by Michael Hierweck 13 Apr '10

13 Apr '10

Hi everybody, we have been trying x2go for about a year now both on our thin clients and as a remote access solution. On our thin clients (both legacy Intel Pentium-III 1 GHz and modern Intel Atom 330) it appears a lot of CPU power is consumed by ssh. Especially while both animations and sounds are played the play back is sometimes interrupted due to the lack of CPU performance. So we temporarily switched back to plain remote X11 (without compression and encryption) for our thin clients while sticking to x2go for remote access. Nevertheless x2go seem to be designed for both purposes. I would like to ask if someone else can confirm this and if the is a workaround. Maybe it will be possible to skip encryption for local use in a future version in order to be able save CPU time and even energy. (Of course x2go uses ssh for both security and port forwarding.) There shouldn't be a complaint but a starting point to discuss this topic. Michael -- EDV-Serviceteam Annika & Michael Hierweck GbR Egerstraße 53, 44225 Dortmund http://www.edv-serviceteam.net

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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

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Ubuntu 9.10 and Kcontrol module
by Cyril Vergne 09 Apr '10

09 Apr '10

Hi Everyone, I'm new here. I don't have developper skills like most of you but there's no Web-Place to talk about this nice product X2go. I'm doing some testing to implement this solution for some of my clients. I tested Ulteo and NX Nomachine. After some more researches I found the FreeNX project which apparently was not supported anymore ... till I found this X2go project. I read about linux4africa where I can find some ideas of implementation, the blog about x2go, but not enough to see the real functions of x2go. In my case for example, I love Ubuntu and I really want to propose it to my client. But there is a big problem about x2go on Ubuntu : No administration console. Apparently the module kcontrol is not any more installable on this distibution (Ubuntu 9.10 in my case and probably the 10.04 in few months) ... and nobody talk about it. Is anyone found the solution in this case ? I read about the reason to not get a forum and I don't get it. The forum is easy to find an answer with the search module. And you don't have to go there everyday to see if there's some new topics or updates, you just have to configure the notifications. Hope the X2Go project will be followed by many many people !! Wish you a nice day. Cyril V

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Reply to list
by Paul van der Vlis 03 Apr '10

03 Apr '10

Hello, Maybe it is an idea to change the reply-adres to the list. This makes it more easy to reply to the list, and not to the individual who send it. Heinz can change this in the Mailman configuration. Good idea? With regards, Paul van der Vlis. -- http://www.vandervlis.nl/

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Re: [X2go-dev] OT: Sound issues
by John A. Sullivan III 03 Apr '10

03 Apr '10

Argh!! did it again - blasted reply all! :) On Sat, 2010-04-03 at 17:57 +0200, Heinz-M. Graesing wrote: > Am 03.04.2010 14:06, schrieb John A. Sullivan III: > > We're finding it very hit and miss when it comes to sound. Kaffeine > > works but Noatun does not. Sometimes flash plays sound across the X2Go > > connection and sometimes it does not. We never get other browser sounds > > (e.g., our Zimbra "pings" when there is new mail or a new IM). We began > > to get Twinklephone working but then it stopped (something has obviously > > changed in our environment and we're still tracking that down). > > Hello John, > > to use pulseaudio to forward sound, the applications need to be able to > use pulseaudio. Even if KDE 3.5 is a popular platform for the use with > x2go, it is not possible to get audio forwarding working out of the box. > KDE 3.5 can't use pulseaudio nativly. This means without configuration > you won't be able to forward sound with the pulseaudio option (but you > can use arts instead). > KDE 3.5 can use esound as "sound device" so you can use the esound > option too. To make it more complex, you can have pulseaudio emulating > esound so after those 3 steps, KDE 3.5 will be able to use pulseaudio too. > The funny thing is, that this last option works best :). > > best regards, > > Heinz Thanks, Heinz. So we'll configure away! We were originally thinking of arts with ALSA and tweaking asound.conf It sounds like (no pun intended) you're intimating we're better off configuring arts to use ESD and then configure Pulse to emulate ESD. Any applications that can work with Pulse we'll set up natively and the rest we'll direct to ESD. Is that the approach? Thanks again - John

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OT: Sound issues
by John A. Sullivan III 03 Apr '10

03 Apr '10

Hello, all. We're having quite a struggle with sound in X2Go. I don't believe it is an X2Go issue as some applications, e.g, Kaffeine using Xine, work perfectly well. I think it is a Lenny + Pulseaudio + KDE3 + arts issue but, since that is a very typical X2Go setup, I thought I'd ask here. We're finding it very hit and miss when it comes to sound. Kaffeine works but Noatun does not. Sometimes flash plays sound across the X2Go connection and sometimes it does not. We never get other browser sounds (e.g., our Zimbra "pings" when there is new mail or a new IM). We began to get Twinklephone working but then it stopped (something has obviously changed in our environment and we're still tracking that down). We've started to really hack away at asound.conf (perhaps also hampered by the fact that there is no sound device in the server itself) but, I am always hesitant to move very far away from defaults for fear that I have overlooked something obvious. Good solutions generally work simply. What issues have other X2Go users found with sound and how have you resolved them? Thanks - John

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Re: [X2go-dev] running in Fedora
by Heinz-M. Graesing 02 Apr '10

02 Apr '10

Am 02.04.2010 20:56, schrieb Léon Keijser: > On Fri, 2010-04-02 at 20:18 +0200, Heinz-M. Graesing wrote: >> Hello Leon, > Hi Heinz, > > Thanks for clearing things up. If you don't object i would like to start > to package the QT client, and submit it for review for inclusion in the > official Fedora repositories. Hi Léon, there is a very good Mandriva(users) port of x2go - maybe it helps if you have a look on their spec files. If you have any further questions, please use the mailing list so that other people who encountering the same problems can have a review on the problem. We are really welcome your help and hope that you won't have bigger problems. best regards, Heinz

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running in Fedora
by Léon Keijser 02 Apr '10

02 Apr '10

Hi, I'm trying to run (and eventually, package) x2goclient-gtk in Fedora (12). First of all, i can't compile it unless i run: $ sh autogen.sh $ sed -i 's:sigc++:parallel:' src/main_window.cc $ ./configure && make && make install Then after it compiles i can start the client, but it gives me an error when trying to connect to an X2go server: Connection failed Unable to write: /home/leon/.x2go/ssh/socaskpassF7TVAV The remote user is 'l.keijser' so i know it can't be a problem on the server side. Actually, when i fire up a client in a Ubuntu virtual, all works well. I have checked the permissions on the .x2go/ssh directory (they are created correctly) and even set them to 777, but with the same error. Can someone tell me what's going on? -- Léon

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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

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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/

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