x2go-dev March 2021

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12 participants
84 discussions

Bug#1427: Update Tumbleweed packages for Perl 5.30
by Tristan Miller 28 Sep '21

28 Sep '21

Package: x2goserver Version: 4.1.0.4 Tags: rpm-packages Various openSUSE Tumbleweed packages for the X2Go server are built in such a way that they require Perl 5.28.1. However, Tumbleweed no longer distributes that version of Perl; it now distributes only Perl 5.30.1. This means that it is impossible to install these X2Go server packages on the most recent release of Tumbleweed, and for Tumbleweed systems where those X2Go server packages were already installed, it is impossible to upgrade Tumbleweed without removing the X2Go server: $ sudo zypper dup [sudo] password for root: Loading repository data... Reading installed packages... Warning: You are about to do a distribution upgrade with all enabled repositories. Make sure these repositories are compatible before you continue. See 'man zypper' for more information about this command. Computing distribution upgrade... 9 Problems: Problem: x2goserver-common-4.1.0.4-0.0x2go1.0.git20191106.1811.heuler.x86_64 requires perl(:MODULE_COMPAT_5.28.1), but this requirement cannot be provided Problem: perl-5.28.1-3.4.x86_64 requires perl-base = 5.28.1, but this requirement cannot be provided Problem: perl-X2Go-Server-DB-4.1.0.4-0.0x2go1.0.git20191106.1811.heuler.x86_64 requires perl(:MODULE_COMPAT_5.28.1), but this requirement cannot be provided Problem: perl-X2Go-Server-4.1.0.4-0.0x2go1.0.git20191106.1811.heuler.x86_64 requires perl(:MODULE_COMPAT_5.28.1), but this requirement cannot be provided Problem: perl-X2Go-Log-4.1.0.4-0.0x2go1.0.git20191106.1811.heuler.x86_64 requires perl(:MODULE_COMPAT_5.28.1), but this requirement cannot be provided Problem: x2goserver-4.1.0.4-0.0x2go1.0.git20191106.1811.heuler.x86_64 requires perl(:MODULE_COMPAT_5.28.1), but this requirement cannot be provided Simply telling zypper to keep the obsolete packages doesn't work as this ends up in a rabbit-hole of seemingly irresolvable dependency issues.

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Bug#1520: Proxy-Server - SSH - strong Cipher crash x2Go-Client
by Marian.Schwarcz＠dlr.de 20 Sep '21

20 Sep '21

Package: x2goClient Version: 4.1.2.2-2020.02.13 Host-System: Windows 10, und Windows Server 2012 R2 (German Language) Installations-Typ: Recommended (Default) *** Problem Description *** When using x2GoClient via jumpserver (as SSH-Proxy-Server), then is X2GoClient automatic closed (without any Information). Problem are the SSH-Strong-Ciphers, which are configured in SSHd on Jumpserver. Strong Ciphers => x2GoClient crashed. If default Ciphers => x2GoClient and connection works. *** X2GoClient - Configuration *** Sitzungsname: test Pfad: / Host: ziel-server Login: test_ye SSH-Port: 22 Proxy-Server für SSH-Verbindung verwenden SSH Host: jumpserver Port: 22 Gleiche Anmeldung wie für X2Go-Server Gleiches Kennwort wie für X2Go-Server XFCE *** Jumpserver Configuration) *** Jumpserver SSHd Config: /etc/ssh/sshd_config (CentOS 7) Ciphers aes128-ctr,aes192-ctr,aes256-ctr The ciphers are used for strong Encryption. Then access from x2GoClient via jumpserver cannot handle this. ------ When the Cipher-Restriction is not configured: Jumpserver SSHd Confg: (CentOS 7) #Ciphers aes128-ctr,aes192-ctr,aes256-ctr then the connection from x2GoClient via jumpserver to Destination X2Go-Server does work. I hope I provided all needed information for you. Let me know if this can be patched, or does our Company need to search for other solution. Thank you. Best regards, Marián Schwarcz

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Bug#913: Inaccurate scaling of dialog boxes and fonts for large DPI screen in Windows 10
by Alves-Foss, James (jimaf＠uidaho.edu) 02 Aug '21

02 Aug '21

Package: x2goclient for windows Version: 4.0.5.0 Downloaded new version of x2goclient for a new Dell Laptop. Screen resolution 3200x1800. OS Windows 10 (just checked, same problem on similar machine in Windows 8.1) When I open the main program, the fonts and windows do not scale well in the session selection boxes When I create a new session and try to open it, I can not see the list of open sessions to connect to. This appears to be a scaling issue for high DPI systems. I tried Windows 7, Windows 8 compatibility modes. I tries to disable display scaling on high DPI systems (see attached images)

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Bug#581: VirtualBox Clipboard Sharing does not work when accessing the host over X2Go
by Michael DePaulo 18 Jun '21

18 Jun '21

Package: nx-libs Version: 3.5.0.27 Severity: normal If you run a VirtualBox VM with its display running under X2Go, the VM's clipboard sharing fails to work in either direction. You cannot copy and paste text between the VM and an app running under X2Go server, nor can you copy and paste text between the VM and an app running on the X2Go Client system. (I believe VirtualBox VMs use SDL to interact with the X server, which in this case is nxagent. This differs from the VirtualBox GUI, which is written in QT.) Specifically, when the X sesssion starts on the guest, a VirtualBox-provided script for X calls "VBoxClient --clipboard" to start the clipboard service. The service runs as the user logged into the guest. However, this service fails to stay running, and thus the clipboard sharing does not work. If you launch the VirtualBox VM on the local X.org X server, the guest's clipboard service stays running and clipboard sharing works. You can also launch the VM in RDP headless mode from x2go (so the VM does not render its display to any nxagent). In this use case, the clipboard service stays running and clipboard sharing works. The strange part is that the configuration of the host affects the behavior of the guest. It makes sense though because it's a bug in the guest's code to integrate with the host. Also, when you do call "VBoxClient --clipboard", it returns 0. And if you call it after the X11 session has already started, the problem still occurs. In x2goclient, I tried turning on and off the following setting, but it had no effect: Options -> Settings -> X-Server settings -> do not use primary clipboard My theory is that this is a bug in nx-libs, and that the bug is probably related to nx-libs being forked from such an old X.org codebase. It is worth looking into whether other SDL apps have clipboard trouble with X2Go on Ubuntu 14.04. (It's also worth testing an older release of Ubuntu as the host OS, since it would have an older release of SDL.) Host system: OS: Ubuntu 14.04.1 64-bit with latest bugfix & security updates nxagent: 2:3.5.0.27-0~446~ubuntu14.04.1 x2goserver: 4.0.1.15-0~847~ubuntu14.04.1 x2goserver-xsession: 4.0.1.15-0~847~ubuntu14.04.1 VirtualBox 4.3.14 (from download.virtualbox.org) "Shared Clipboard" is set to "Bidirectional" for the VM $ cat /etc/x2go/x2goagent.options | grep -v '^#' | grep -v '^$' X2GO_NXAGENT_DEFAULT_OPTIONS="" X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension XFIXES" X2GO_NXAGENT_DEFAULT_OPTIONS+=" -nolisten tcp" Guest OS: Ubuntu 12.04.5 64-bit with precise HWE stack, the virtual kernel, and all the latest bugfix & security updates OS-provided XFCE virtualbox-guest-dkms: 4.1.12-dfsg-2ubuntu0.6 virtualbox-guest-utils: 4.1.12-dfsg-2ubuntu0.6 virtualbox-guest-x11: 4.1.12-dfsg-2ubuntu0.6 Configured according to: https://github.com/mikedep333/duckpan-vagrant/tree/duckduckhack-vm The aforementioned script is: /etc/X11/Xsession.d/98vboxadd-xclient (I'm sure a different script would be used for distros like CentOS which lack the /etc/X11/Xsession.d/ folder). Client system: Windows 8.1 64-bit with Update 1 and all the minor/monthly updates available X2GoClient 4.0.2.1+hotfix1+build3

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Bug#1369: Keys do not release when using Emacs in X2GO Client
by Yan Zhang 03 May '21

03 May '21

Package: x2goclient Version: 4.1.2.0 I am using Emacs 24.5.1 with x2go client version 4.1.2.0 in Windows 10. My server OS is Ubuntu 16.04 and the x2goserver comes from the PPA repo. The problem happens if I hit "ctrl+space" to start mark region in Emacs and then press down "ctrl+n" to scroll down the region for a few seconds. Usually after I release "ctrl+n", Emacs will leave the currently marked region for further commands. But in the reported version of client, Emacs keeps scrolling down until it reaches the end of the file. There is no way to stop it within Emacs (e.g., "ctrl+g"). I have tried to move the cursor by keeping "ctrl+n" pressed down. This issue does not happen after I release the key. This issue happens when the session type is either "XFCE" or "published application". I have not tested other session types as I do not have an environment for that. And client version 4.1.1.1 does not seem to have this issue. Thanks and regards, Yan

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X2go client window misplaced in LXQt
by Kalle Tuulos 02 Apr '21

02 Apr '21

I'm running Lubuntu 20.04, which has LXQt. The X2go client has been installed using apt method, current version is 4.1.2.2. When the X2Go client is opened and closed, on the next time, it will open on 30 pixels higher and 2 pixels left position, than the earlier position. This can be seen from file ~/.x2goclient/sizes: Before opened: [mainwindow] maximized=false pos=@Point(275 170) size=@Size(1017 600) Window is not moved, just closed: [mainwindow] maximized=false pos=@Point(273 140) size=@Size(1017 600) Opened and closed again, not moved: [mainwindow] maximized=false pos=@Point(271 110) size=@Size(1017 600) This same problem is in many Qt based applications, so this is not X2go problem as such, but on the Qt framework. Also, this same problem was already on 18.04 version of Ubuntu, on another computers. I have a workaround for this - the sizes files is overwritten on each login with a valid one. Is there any more clever fix for this? BR, Kalle -- - Kalle

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GitLab Install LXC - Update (issue)
by Melroy van den Berg 01 Apr '21

01 Apr '21

Hi all, I tried to omnibus GitLab install on the VM. Failed on: Expected process to exit with [0], but received '255' ---- Begin output of sysctl -e -p /opt/gitlab/embedded/etc/90-omnibus-gitlab-kernel.shmmax.conf ---- STDOUT: STDERR: sysctl: setting key "kernel.shmmax": Read-only file system ---- End output of sysctl -e -p /opt/gitlab/embedded/etc/90-omnibus-gitlab-kernel.shmmax.conf ---- Ran sysctl -e -p /opt/gitlab/embedded/etc/90-omnibus-gitlab-kernel.shmmax.conf returned 255 Due to: command "sysctl -e -p /opt/gitlab/embedded/etc/90-omnibus-gitlab-kernel.shmmax.conf" causing the error: sysctl: setting key "kernel.shmmax": Read-only file system Read-only of the /sys/ directory is typical the case with LCX containers... But the advice value of the shmax is: cat /opt/gitlab/embedded/etc/90-omnibus-gitlab-kernel.shmmax.conf kernel.shmmax = 17179869184 I can complete the setup if you want, by using a workaround by commenting-out the related section in: /opt/gitlab/embedded/cookbooks/cache/cookbooks/package/resources/gitlab_sysctl.rb. And run: gitlab-ctl reconfigure. But I rather like to get this working in a correct manner. Maybe somebody add at this shmmax statement above to the host /etc/sysctl.conf file? Let me know if somebody can help me with this or which direction you want to go. Ps. where are not the only one on the internet: http://letmegooglethat.com/?q=STDERR%3A+sysctl%3A+setting+key+%22kernel.shm… Thx! Kind regards, Melroy van den Berg

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Bug#1533: Mac client: connection timeout 30 seconds after session start
by Ricky Charlet 01 Apr '21

01 Apr '21

Package: unknown Version: 4.1.2.2 Howdy, When I connect from Mac client to ubuntu server, I get a “connection timeout” 30 seconds after “connection start.” Other people can connect to my server. Error message is: Loop: WARNING! Overriding auxiliary X11 port with new value '1'. Warning: Overriding auxiliary X11 port with new value '1'. Info: Connecting to remote host 'localhost:36652'. Info: Connected to remote proxy on FD#11. Info: Connection with remote proxy completed. Loop: WARNING! Unrecognized session type 'unix-kde-depth_32'. Assuming agent session. Warning: Unrecognized session type 'unix-kde-depth_32'. Assuming agent session. Info: Using ADSL link parameters 1408/24/1/0. Info: Using cache parameters 4/4096KB/8192KB/8192KB. Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_32'. Info: Using ZLIB data compression 1/1/32. Info: Using ZLIB stream compression 4/4. Info: No suitable cache file found. Info: Forwarding X11 connections to display '/private/tmp/com.apple.launchd.E12k8P0IX6/org.xquartz:0'. Info: Forwarding auxiliary X11 connections to display '/private/tmp/com.apple.launchd.E12k8P0IX6/org.xquartz:0'. Session: Session started at 'Fri Mar 19 09:38:16 2021'. Connection timeout, abortingSession: Terminating session at 'Fri Mar 19 09:38:46 2021'. Info: Waiting the cleanup timeout to complete. Session: Session terminated at 'Fri Mar 19 09:38:47 2021'. On the server, in /var/log/messages, I get what appears to be a success report: Mar 19 09:38:16 hpnsw4371 /usr/bin/x2gostartagent: successfully started X2Go Agent session with ID charletr-50-1616171893_stDMATE_dp32 I have a tcpdump (is in an ssh tunnel, to a little vague) which shows client sending dup packet not quite, but almost 30 seconds into session attempt. 116 33.763841 15.116.49.166 16.99.147.244 SSHv2 108 Server: [TCP Spurious Retransmission] , Encrypted packet (len=64) 117 33.763941 16.99.147.244 15.116.49.166 TCP 56 [TCP Dup ACK 114#1] 64138 → 22 [ACK] Seq=3239 Ack=5027 Win=262144 Len=0 SLE=4963 SRE=5027 Client = MacOS 10.15.7 (Catalina…and due to corp policy, I cannot upgrade); x2go 4.1.2.2 with qt 4.8.7 with xquartz 2.7.11 with xorg 1.18.4 Server : x2goversion : 1.0.2.4 : 0.0.1.6 : 4.1.0.3 : 4.1.0.3 : 4.1.0.3 : 4.1.0.3 : 4.1.0.3 : 3.5.99.22 : 4.1.0.3

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x2goagent segfaults with x2goclient from ubuntu 20.10
by Kenneth Johansson 01 Apr '21

01 Apr '21

so I have been using x2go for years and its works fine for what I need but today it stopped working. the error message was not really clear so I deleted and reinstalled (server and client) but still no go. Turns out its the x2goagent that segfaults on the server side. The client is an ubuntu 20.10 and the servers I tested with is debian 10 and ubuntu 20.04. To make sure that there was no version mismatch I then installed the server on the ubuntu 20.10 computer and tried to connect to localhost and still get the segfault. how to debug this ?? what I try to do is use a single application and start "command=/usr/bin/xterm" since its not working even to localhost this should be something that a lot more people have a problem with than just me. I have deleted all configurations for both server and client and the only thing I change when I create a new session is the host login session type. So I do not see how I could have made something wrong here.

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Bug#1535: users randomly (but repeatedly) get a "libx2go-server-db-sqlite3-wrapper insertsession" error at connection attempts
by Enrico Bertocchi 27 Mar '21

27 Mar '21

Package: x2goserver Version: Devuan Beowulf package x2goserver/stable,now 4.1.0.3-4 Dear sirs, I'm currently employing x2go (Devuan Beowulf package x2goserver/stable,now 4.1.0.3-4) to operate a terminal server for computer lab lessons. It randomly happens that some of the students experience sequences of failed connection attempts (usually 5-10 in a row) with the following kind of error (typed from a typical screenshot) [...] n283287-55-1616084795_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. : /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper insertsession 55 x2go-cdm [...] n283287-55-1616084798_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. : /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper insertsession 55 x2go-cdm n283287-55-1616084799_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. Unable to find free display port or insert new sessions into database; parameters: port(55), hostname (x2go-cdm) and session name (n283287-55-1616084799_stDmwm_dp32). A further, subsequent connection attempt randomly succeeds instead. At the same time, other students experience regular login procedures. The student passwd data is taken from a "sssd-ldap" domain, fact this that might cause some of the quirks. Please indicate me which further data on the server side might be relevant for investigating the problem. Thanks. -- Enrico Bertocchi

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x2go-dev March 2021