x2go-user April 2015

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25 participants
41 discussions

Re: [X2Go-User] Fwd: Ctrl-s not recognised (OS X client)
by Mihai Moldovan 08 Apr '15

08 Apr '15

On 08.04.2015 01:35 PM, Christopher Thomas wrote: > I usually start emacs using a function that I have defined in my > .bashrc file that puts it in the background automatically, since > otherwise I often forget to do that. However the behaviour is the same > if I simply type "emacs" from the command line. > > However this problem is not confined to emacs. For example if I start > LibreOffice then the usual save command Ctrl-s does nothing. This hints at something else capturing the keypresses. So, emacs is started by bash and bash naturally in a terminal, but what is this terminal started from? A full desktop environment or the terminal emulator as a single application in X2Go Client? > Should I be trying to sort this out from the server end? But as I > said this is a university server so there is a limited amount I can do > apart from contacting the administrators there. I have started the xev > program from a terminal after logging in via x2go but I don't know how > to interpret the output. Starting up xev will likely put it into foreground and every X11 event is printed out verbatim. Make sure the pointer doesn't move, or you will be spammed with messages. Pressing Ctrl will print a message with "Control_L" on the third line. Afterwards, pressing "s" (hold Ctrl all the time) will print a message having "s" in the third line and the fourth line will read XLookupString gives 1 bytes: (13) "" if everything is working as expected. Given that the key combination is not recognized in emacs and LibreOffice, I suspect nothing will pop up in xev. However, my basic test suggested that it's not a general X2Go problem, as it's working on my machine(s) and I know a few users using LibreOffice via X2Go. Naturally, Ctrl-S not working would be a grave issue for them. My current suspicion is that the keypresses are either captured by a desktop environment or NX. I understand that you have no control over the remote system as such, but, if existent, what is the content of /etc/nxagent/keystrokes.cfg? Mihai

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Ctrl-s not recognised (OS X client)
by Christopher Thomas 08 Apr '15

08 Apr '15

Hi, I connect to my university servers remotely from OS X using x2go. It seems that the keystroke combination Ctrl-s (and perhaps some other combinations) are not recognised. This is quite inconvenient, particularly since I use emacs extensively and Ctrl-s is the command for a search. I couldn't find any info on this problem. Can anyone help? Chris

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OSX/windows keyboards?
by Les Mikesell 07 Apr '15

07 Apr '15

When I start a remote linux session from an OSX client, then disconnect and pick up the session from a windows client, the screen seems OK but the keyboard input is garbage. I thought I had that problem a long time ago and then it was fixed. Do the client versions have to stay in sync? And is there some way to reset the keyboard type to fix it and continue the session? -- Les Mikesell lesmikesell(a)gmail.com

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trouble connecting to server
by Michael Stauffer 06 Apr '15

06 Apr '15

Hi, I've just setup a new x2go server (CentOS Linux release 7.0.1406). I installed using yum and the epel repo. I can ssh to the server without trouble. I'm running x2goclient on Max OS X 10.8.5. I have XQuartz installed and it works with other X apps. === When I try to connect, I get this in the x2goclient window: 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 '55900'x2go-WARNING-1> "Can't load translator: :/x2goclient_en_us" x2go-WARNING-2> "Can't load translator: :/qt_en_US" Connection timeout, abortingInfo: Aborting the procedure due to signal '15'. Session: Session terminated at 'Fri Mar 27 16:53:57 2015'. . Session: Starting session at 'Fri Mar 27 16:53:27 2015'. Info: Connecting to remote host 'localhost:31009'. === I found x2go logs on the client: .x2go/C-mgstauff-52-1427489600_stDGNOME_dp32/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 '4746'. Session: Starting session at 'Fri Mar 27 16:53:24 2015'. Info: Proxy running in server mode with pid '4746'. Info: Waiting for connection from 'localhost' on port '30009'. Info: Aborting the procedure due to signal '1'. Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-mgstauff/C-mgstauff-52-1427489600_stDGNOME_dp32/options:52''. Session: Aborting session at 'Fri Mar 27 16:54:14 2015'. Session: Session aborted at 'Fri Mar 27 16:54:14 2015'. === On the server, I see this in /var/log/messages: Mar 27 16:53:24 cx2go /usr/bin/x2gostartagent: successfully started X2Go agent session with ID mgstauff-52-1427489600_stDGNOME_dp32 Mar 27 16:54:14 cx2go /usr/bin/x2gosuspend-session: session with ID mgstauff-52-1427489600_stDGNOME_dp32 has been suspended successfully When I terminate the failed x2goclient session, the app crashes. Does anyone have any suggestions about this? Thanks! -M

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CTR-ALT- <- ->
by Robert Dinse 04 Apr '15

04 Apr '15

I noticed that at some point someone fixed x2go so my control-alt-left or control-alt-right arrows now switch work spaces as they do in remmina which makes x2go SO much more useful to me. Whoever made that fix, THANK YOU! -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

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Centos 7
by Robert Dinse 04 Apr '15

04 Apr '15

Under CentOS 7 I've updated to the latest kernel provided in the El Repo repository, kernel-ml.x86_64 3.19.3-1.el7.elrepo @elrepo-kernel They have no version configured with pre-emption and this version without does not provide smooth video over x2go, very jerky and laggy like the stock kernel. If I build a kernel from source from kernel.org, even using the same conf, and install it: make clean; make; make modules_install install The entire process proceeds without error but it breaks something horribly in grub and instead of a boot menu I get a pointer alignment error when I try to boot, so I haven't been able to install a custom preemptive kernel on this machine. The packaged kernels install fine, so it's got to be something different with grub2 that the make file isn't doing. I've found instructions on the web for building custom kernels and they recommend the above procedure which is the same as Centos6, but it does not work for me. Anyone with any pointers? -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

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x2gobroker-wsgi on Ubuntu 14.04 + Apache2 + libapache2-mod-wsgi
by Simon Baev 04 Apr '15

04 Apr '15

Hi All, I cannot make broker-wsgi to work. What I've done: 1. I installed x2gobroker-wsgi from package on publicly available host 2. I installed Apache2 and libapache2-mod-wsgi 3. I removed /etc/apache2/conf.d/x2gobroker-wsgi 4. I edited /etc/apache2/sites-available/x2gobroker to 1. replace SSL certificate data with the real one which is installed on the server 2. replace value of ServerName directive to match real hostname of the server (originally it was set to "localhost") 5. Restarted apache2 service When I connect to the server in a web browser (using hostname listed with ServerName directive) via https:// I'm getting webpage which belongs to default vhost, i.e. content of index.html file located in /var/www When I try to navigate to https://<hostname>/plain/inifile I'm getting 404 I guess I cannot figure out how to deal with wsgi... because for me it seems like Apache is looking for plain/inifile located in /var/www and totally ignores wsgi business. Any help is greatly appreciated. -- Simon

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Re: [X2Go-User] trouble connecting to server
by Mihai Moldovan 03 Apr '15

03 Apr '15

On 02.04.2015 11:29 PM, Michael Stauffer wrote: > Doh! OK I tried uninstalling gnome 3.10 so I could put an earlier > version on. It's not working easily though. I"m just going to start > over with centos 6.6 and that should work out of the box if I > understand right, since it uses gnome 2. IIRC, yes. But why not use CentOS 7 and for instance XFCE? Mihai

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Low Latency
by Robert Dinse 03 Apr '15

03 Apr '15

On 04/02/2015 10:46 AM, Les Mikesell wrote: Someone recently posted on the x2go list that he had a problem with jerky videos playing remotely on Ubuntu, but solved it by installing a low latency kernel that was available as an alternative. That made me curious as to whether CentOS has an equivalent - or a way to build something similar. Les, I can help you with CentOS 6 kernels but I haven't been successful at installing a custom kernel on CentOS 7, for some reason after I update grub2 then try to boot, I get a pointer alignment error and can't even get the grub boot screen up. But I have been successful with CentOS 6 and can provide assistance if needed. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874.

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x2goserver causes increase in ksoftirqd/x CPU usage
by Rett Walters 02 Apr '15

02 Apr '15

Hello: I have two machines running Archlinux with x2goserver running from arch repository packages that both exhibit abnormally high CPU usage in ksoftirqd/x (where x=the cpu core #). Here is an example top output showing the usage while idle - ksoftirqd is always the top user of CPU when the system is idle: top - 13:27:42 up 27 days, 16:27, 8 users, load average: 0.84, 0.63, 0.49 Tasks: 326 total, 1 running, 325 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.6/0.7 1[|| ] GiB Mem : 26.9/15.574 [ ] GiB Swap: 5.4/16.000 [ ] PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND 45 root 20 0 0.0m 0.0m 4.0 0.0 478:55.34 S ksoftirqd/7 65 root 20 0 0.0m 0.0m 2.6 0.0 417:08.28 S ksoftirqd/11 25 root 20 0 0.0m 0.0m 2.0 0.0 109:05.16 S ksoftirqd/3 60 root 20 0 0.0m 0.0m 2.0 0.0 523:14.28 S ksoftirqd/10 9180 rettw 20 0 2663.9m 1.321g 2.0 8.5 16:08.16 S VBoxHeadless 50 root 20 0 0.0m 0.0m 1.3 0.0 527:10.22 S ksoftirqd/8 9236 rettw 20 0 1588.0m 371.6m 1.3 2.3 2:29.45 S VBoxHeadless 3 root 20 0 0.0m 0.0m 0.7 0.0 392:21.72 S ksoftirqd/0 30 root 20 0 0.0m 0.0m 0.7 0.0 133:12.11 S ksoftirqd/4 55 root 20 0 0.0m 0.0m 0.7 0.0 463:32.57 S ksoftirqd/9 1005 rettw 20 0 3058.8m 66.6m 0.7 0.4 29:58.26 S kwin 8502 root 20 0 35.1m 3.7m 0.7 0.0 0:13.56 R top 30713 rettw 20 0 605.3m 22.2m 0.7 0.1 6:45.55 S konsole 1 root 20 0 33.6m 4.1m 0.0 0.0 0:18.42 S systemd 2 root 20 0 0.0m 0.0m 0.0 0.0 0:00.32 S kthreadd If I stop the x2goserver process, the ksoftirqd processes drop down to almost nothing. This seems to coincide with the 3.18 and 3.19 linux kernel series. Could this be some sort of interaction between x2goserver and the kernel? System specs: i7-5930k w/16G DDR4 2133 RAM MSI X99 SLI-Plus GTX 470 LSI SAS2008 Disk controller card Archlinux latest packages - kernel version 3.18.6-1-ARCH KDE, Xorg, Nvidia binary blob video driver Second system with the issue: i7-3930k w/16G DDR3 1600 RAM Asus Sabertooth X79 GTX 970 Archlinux latest packages - kernel version 3.19.2-1-ARCH KDE, Xorg, Nvidia binary blob video driver I have several other arch systems as well, but none of them have x2goserver running on them and therefore don't exhibit the ksoftirqd cpu usage. Archlinux x2goserver package version: extra/x2goserver 4.0.1.19-2 Doesn't seem to impact the system much, just thought it seemed a bit abnormal for this to generate that much soft irq activity. -- Rett Walters

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x2go-user April 2015