x2go-dev March 2012

x2go-dev@lists.x2go.org

23 participants
34 discussions

x2go client for mac osx
by Ricardo Díaz Martín 14 Nov '12

14 Nov '12

Hi, Is there somebody with x2go client working in MAC OS X Leopard or Snow Leopard? I have try in two different mac box and I always get the same message info "Can't connect to X-Server. Please check your settings". In settings looks like all ok (path to X11.app in mac osx is ok and verify it got right permissions). X-Server in both macs are installed and running. I have try to connect to nomachine linux server and X works fine. Some tips? Regards, Ricardo Díaz

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Greetings and a lot of questions.
by Daniel Quiroga 24 Jul '12

24 Jul '12

Hi! I am working on a X2go client for Android/iOS the client gui is done, i am working on the libraries for ARM under android and iOS. i took the x2goplugin (the little´s standalone x2goclient) as base for my development. it requires this files: libx2go.so libXcomp.so libXcomp.so.3 libXcomp.so.3.4.0 nxproxy sftp-server sshd sftp-server and sshd are done (not exactly rocket science), but i need to build the others, for libXcomp.so in www.nomachine.com/sources.php i can download a pack of source code. ¿will it work with x2go? ¿is it different? where can i download the official x2go source for those files? about libx2go.so ¿wich source package provides it? Thanks in advance for any help. (All the work i am doing will be documented so, other people can get working x2goclients and when i get my client finished i will be glad of make it available for all x2gousers). Daniel -- Daniel Quiroga www.daniel-quiroga.com cel: 3012745740 —¿Por qué nunca hablamos de Ezequiel? Apoyó las cosas en el piso con mucha calma. Estiró su mano como para acariciarme. Me miró. Bajó la mano. Luego la vista y dijo en un susurro. —Hay cosas de las que es mejor no hablar.

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Mac OS X GUI - not connecting
by Stephan Diehl 10 Apr '12

10 Apr '12

I start the new 3.99.1 r2 release and the gui will not connect. The last status shown ist "connecting" but the nx log in the detail window will not showed. If i start the client from the console, i got this error: ----- Contents/MacOS/x2goclient ONMainWindow constructor Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 ONMainWindows constructor finished, home Directory is: "/Users/stephan" Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 0x7fff707e3700 read 1 sessions from config file Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 Using QPixmap on thread ID: 0x7fff707e3700 start new ssh connection to server: "ltsserver.somewhere.net" : "1022" krb: false ssh connection ok continue normal x2go session "x2gostartagent 1024x768 adsl 16m-jpeg-9 unix-kde-depth_32 de query 0 D GNOME" "channel_open_session schlug fehl" : "Server specified invalid channel 43" ----- This error is on two mac. one with 10.5.8 and one with 10.7.3. anyone knows this error? Any hint to find the solution? Thanks Stephan Diehl Geschäftsführer Open Solutions GmbH & Co. KG Luisenweg 109 20537 Hamburg Fon: 040 / 7070806 - 70 Mail: stephan.diehl(a)opensolutions.net Registergericht: Amtsgericht Hamburg, HRA 105 704 Persönlich haftende Gesellschafterin: Open Solutions GmbH Registergericht: Amtsgericht Hamburg, HRB 999 00 Geschäftsführer: Stephan Diehl USt-Id-Nr: DE253775678; Steuer-Nr: 46/649/00349

3 6

libssh, nagle, and performance issues
by John A. Sullivan III 10 Apr '12

10 Apr '12

Hello, all. Since moving to the newer clients using libssh, I've noticed what appears to be a performance degradation. It smells like Nagle coalescing packets, e.g., most of the screen will paint, then it will pause a moment, and then the rest will paint. Is there any chance we have neglected to disable Nagle when invoking libssh? This appears to have affected the SNMP over SSH project: http://books.google.com/books?id=S62is2vVoVgC&pg=PA29&lpg=PA29&dq=libssh +nagle&source=bl&ots=F8Iw-pvQxd&sig=f5dfy0K0ewzSZOhqzTJRSKsDKZ8&hl=en&ei=KppzTrCZD4LJgQeMxLzzDA&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CBwQ6AEwAA#v=onepage&q=libssh%20nagle&f=false This is in section 4.1. The difference was a latency of over 800ms to one of under 60ms. That seems to be about what I am seeing. There is a delay of roughly a second and then the rest of the screen comes through. Thanks - John

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x2goclient crashing
by Oliver Burger 05 Apr '12

05 Apr '12

Hi, I have a "little" problem. I built x2goclient, the nx-libs and x2goserver from the SOURCES and it does work, when client and server are running on the same computer. But x2goclient crashes, as soon as it runs on a different one, after showing a popup window, telling me the server reset the connection. Is there any one having an idea, why that is the case? See the client's debug messages here: http://pastebin.com/RTRhRwaZ and the server's log output here: http://pastebin.com/qzEUjkyK Thanks, Oliver

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NXauth segfaults with new cairo 1.12
by Andreas Radke 03 Apr '12

03 Apr '12

I'm seeing nxserver 3.5.0-x crashing with new cairo 1.12 release with this dmesg entries: Mar 31 14:11:22 workstation64 kernel: nxagent[17639]: segfault at 0 ip 00000000004a8d03 sp 00007fff9bd9a320 error 4 in nxagent[400000+4f4000] Is there any fix known how to track this down? I know Debian and Gentoo users already have new cairo available. -Andy ArchLinux

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NX3.5 speed degradation
by Eugene San 29 Mar '12

29 Mar '12

Hi all, I want to discuss the subject. Story goes like this: About 6 months, while planning upgrade (Ununtu 11.04->11.10) I've noticed severe degradation in speed of NX sessions. At the time I've decided to wait until LTS release, while being sure issue is related to GUI changes in Ubuntu. Recently I've reviewed the situation with 12.04 and found that problem is still there and related to NX and not to GUI changes in Ubuntu. My guess is that surrounding changes in distribution cause NX agent to misbehave. Overall user experience became unusable even on LAN and localhost connections. Now to the details: 1. Screen redraw operations lags heavily even on local links. Instant (sub 0.5sec) on U10.04, up to 5 seconds on U12.04. 2. Constant screen redraws consume much more traffic. Sub 100kbps on U10.04. 10mbps+ on U12.04 (Creating session with WAN quality settings and reconnecting with LAN, lowers bandwidth to sub 1mbps but picture quality suffers) 3. NX4 on U12.04 is faster 3x (in average) than 3.5 on U10.04. 4. NX3.5 on U12.04 is slower 3x then NX3.5 on U10.04 (some tests are x1000 slower!) 5. Hybrid NX3.5<->NX4 is slow with NX3.5 as server and fast with NX4 as server. Some details: * I've evaluated both 32 and 64 bit platforms. * I've compared fresh Ubuntu 10.04 and 12.04. * Both Nomachine NX binaries and X2GO binaries (ppa:x2go/ppa) were tested. * For reference I've performed NX4 and hybrid NX3.5<->NX4 testing. * Tested several usecases: * Desktop with manual operation of terminal, webbrowser and random GUI application. * Rootless UnixBench in graphics mode. (Note in 64bit test caches NX agent!) * Desktop UnixBench in graphics mode. (Note in 64bit test caches NX agent!) * Rootless Xterm with scrolling text (ls -R /) Please provide your feedbacks.

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A couple odds and ends questions
by senrabdet＠aol.com 26 Mar '12

26 Mar '12

Hi All: A couple of odds and ends questions about which we're hoping to get some help/clarification: 1) Stored Session Data x2go seems to store a fair amount of session data on both the server and the client in the .x2go folder on both. While these are not large folders, is there a concern that they will mount up over time? Are they limited to a specific number of folders and don't grow beyond that? Is this a "not to worry" sort of thing? 2) Restart Client Session from the Server Is it possible to kill and/or restart a specific client session from the server, presumably from the admin account on the server (we understand that this can be done from the client side)? 3) Force Use of Passwords Is there a way in x2go to force use of log in passwords? We're not sure this is a good idea (or maybe one that has some pluses and some minuses), but can it be accomplished? The only way we've found so far is to encrypt the users /home directory, cancel when the connection fails, and then connect when presented with the x2go screen (usually shown after you log out) that allows us to enter a password. Thanks! Ted

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Setting Number of Allowed Connections Per User Account
by senrabdet＠aol.com 26 Mar '12

26 Mar '12

Hi All: We're hoping to set and enable the number of allowed connections/sessions by user and user group in x2go. E.g., we want to limit a user to one session/connection/display at a time: that means from client machine A, if the user A is connected, a connection to his/her account could not be established from client machine B or a second connection couldn't be established from client Machine A. User A, if s/he had second account on the server, however, could start one and only one connection to that second account while running one and only one session to the first account. We think we've seen some posts to this effect involving editing /etc/x2go/x2goserver.conf and /usr/bin/x2gosessionlimit (see http://comments.gmane.org/gmane.linux.terminal-server.x2go.devel/954) We've tried making some of the following types of edits: A) If we edit x2goserver.conf alone, and set either "UserA=1 and/or "UserGroupA=1", we can make multiple connections. When we start another instance of x2go, it shows there is a current session, and when we select "New" in the GUI, a second concurrent session begins. B) If we edit /usr/bin/x2gosessionlimit, and make the following changes and then do a "service x2goserver restart" (not sure if this restart is appropriate or necessary)... Add these lines: if($strlimit <= $scount) { print "LIMIT\n"; exit 0; } Comment out these lines: if($maxlimit <= $scount) { print "$maxlimit\n"; exit 0; } print "$maxlimit\n"; ....and change settings in x2goserver.conf, we got some inconstant results we haven't been able to duplicate, but were along the lines either of a "session limit being exceeded" message even if we had group and/or user limits set to 1 (i.e., we were unable to connect at all), or back to any number of sessions we wanted to start. Can someone suggest a procedure/example of how to do this successfully? Ideally, we'd like the flexibility to limit # of connections/sessions both by user group and individual user. Thanks, Ted

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Re: [X2Go-Dev] [X2Go-User] Fwd: Flash Problems
by John A. Sullivan III 26 Mar '12

26 Mar '12

On Sun, 2012-03-25 at 09:51 -0400, senrabdet(a)aol.com wrote: > Hi All: > > > A quick follow up - we built out a 32 bit instance of Ubuntu Server > 10.4 and re-tested > - on a LAN, the video is pretty good > - on a remote server (over the Internet), the results were like our > 64bit experience....the video stalls and refreshes so slowly it is > pretty unusable. > > > We thought the remote video worked well some time ago, though perhaps > are wrong(?). Are there settings in x2go we should try, possibly on > the compression method? Or any other thoughts? > <snip> Our experience with NX for WAN video have been far less than satisfactory. We are eagerly waiting for SPICE to mature and hope it can be integrated as an alternative to NX into X2Go although I do see that SPICE development is leading toward implementing all the other features of X2Go as well such as sound, file sharing, and printing redirection - John

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x2go-dev March 2012