x2go-user July 2018

x2go-user@lists.x2go.org

10 participants
13 discussions

Clipboard stops working
by Norm Green 11 Mar '19

11 Mar '19

Hello List, I find that the clipboard stops working after a period of time. Specifically, copying from the windows desktop to the x2go window doesn't work because x2go thinks the clipboard is empty. I am copying from emacs on Windows to emacs on Linux. It doesn't matter how many times I select and copy on windows, x2go does not pass the clipboard contents to emacs on Linux. But if I disconnect from the server and reconnect, it works, using the same emacs windows. This is with x2go client 4.1.1.1 running on Win7, but it also happened on previous x2go client versions (4.0.x) . x2go server 4.0.1.20 is running on Ubuntu 16.04 Is this a known bug? Any way to fix it? Norm Green

4 19

Connection timeout over high latency network links
by Brent Roman 08 Mar '19

08 Mar '19

I'm trying to run a remote X-session on a satellite link. The ping latency is typically 800ms. I have no trouble ssh'ing to the remote machine, but, whenever I try to connect a remote session via the x2goclient, it ends within a couple seconds with a dialog box saying: Timeout connecting to raven raven is the remote hostname. Both machines are running Debian Jessie. The x2goclient is version 4.4.1.0 Is there some connection timeout parameter that I could increase to make it possible to use high latency links? Is this fixed in newer versions? Thanks! -- Brent Roman MBARI Software Engineer Tel: (831) 775-1808 7700 Sandholdt Road, Moss Landing, CA 95039 mailto:brent@mbari.org http://www.mbari.org/~brent

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Re: [X2Go-User] ssh kex error
by is＠k4ts.net 13 Nov '18

13 Nov '18

Am 19.10.2015 17:06, schrieb Robert Dinse: > the new version of openssh disabled certain insecure > ciphers... Version7 is what you mean. I use 6.9 on both client and server. > you can add > the following line to your /etc/ssh/sshd_config manually enable the > insecure old ciphers: > > KexAlgorithms > curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 Adding these ciphers doesn't help - same algo error, Thats wired coz I can ssh to the server without any issues. > -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- > 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. > > On Mon, 19 Oct 2015, is(a)k4ts.net wrote: > >> Date: Mon, 19 Oct 2015 15:12:43 +0200 >> From: is(a)k4ts.net >> To: x2go-user(a)lists.x2go.org >> Subject: [X2Go-User] ssh kex error >> >> hi, i'm not able to connect >> to my new hardened gentoo server using x2go. >> >> No matter which key type i select for the connection, >> the client (v. 4.0.5.0) terminates with the following: >> >> kex error : no match for method server host key algo: >> server [ssh-rsa,ssh-ed25519], client [ecdsa-sha2-nistp256] >> >> I have rsa and ed25519 keys on my client and server. >> >> sshing from the shell works like always. log is attached. >> >> do you have an idea, whats might wrong? >> >> thx, >> k4t >> >> k4tfish@e10 ~ $ ssh k4tfish@host >> OpenSSH_6.9p1-hpn14v5, OpenSSL 1.0.2d 9 Jul 2015 >> debug1: Reading configuration data /etc/ssh/ssh_config >> debug1: Connecting to host.net port 51822. >> debug1: Connection established. >> debug1: identity file /home/k4tfish/.ssh/id_rsa type 1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_rsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519 type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519-cert type -1 >> debug1: Enabling compatibility mode for protocol 2.0 >> debug1: Local version string SSH-2.0-OpenSSH_6.9p1-hpn14v5 >> debug1: Remote protocol version 2.0, remote software version >> OpenSSH_6.9p1-hpn14v5 >> debug1: match: OpenSSH_6.9p1-hpn14v5 pat OpenSSH* compat 0x04000000 >> debug1: Authenticating to host...net:51822 as 'k4tfish' >> debug1: SSH2_MSG_KEXINIT sent >> debug1: SSH2_MSG_KEXINIT received >> debug1: AUTH STATE IS 0 >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: server->client chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: client->server chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY >> debug1: Server host key: ssh-ed25519 SHA256:xyz >> debug1: Host '[host.net]:51822' is known and matches the ED25519 host >> key. >> debug1: Found key in /home/k4tfish/.ssh/known_hosts:203 >> debug1: SSH2_MSG_NEWKEYS sent >> debug1: expecting SSH2_MSG_NEWKEYS >> debug1: SSH2_MSG_NEWKEYS received >> debug1: Roaming not allowed by server >> debug1: SSH2_MSG_SERVICE_REQUEST sent >> debug1: SSH2_MSG_SERVICE_ACCEPT received >> debug1: Authentications that can continue: >> publickey,password,keyboard-interactive >> debug1: Next authentication method: publickey >> debug1: Offering RSA public key: /home/k4tfish/.ssh/id_rsa >> debug1: Server accepts key: pkalg ssh-rsa blen 279 >> debug1: Authentication succeeded (publickey). >> Authenticated to host ([123.123.456.7]:51822). >> debug1: Final hpn_buffer_size = 2097152 >> debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 >> debug1: channel 0: new [client-session] >> debug1: Enabled Dynamic Window Scaling >> debug1: Requesting no-more-sessions(a)openssh.com >> debug1: Entering interactive session. >> debug1: client_input_global_request: rtype hostkeys-00(a)openssh.com >> want_reply 0 >> debug1: Sending environment. >> debug1: Sending env LC_COLLATE = C >> debug1: Sending env LANG = en_US.utf8 >> >> _______________________________________________ >> x2go-user mailing list >> x2go-user(a)lists.x2go.org >> http://lists.x2go.org/listinfo/x2go-user >>

3 3

Local Desktop access crashes client almost immediately
by James M. Pulver 06 Oct '18

06 Oct '18

I'm running Scientific Linux 7.4 on the server, and Windows 7 on the client. I want to access my accounts (non-privileged) local desktop remotely. I log in and select the local desktop option in the client. I get a flash of the desktop (with the wrong screen size remotely anyway - I see a small part of the desktop) and then the Windows X server crashes. x2goserver-4.0.1.20-1.el7.x86_64 X2Go Client v. 4.1.0.0 Any ideas? -- James Pulver CLASSE Computer Group Cornell University

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It might be that we already have KDE5/Plasma support ...
by Stefan Baur 01 Oct '18

01 Oct '18

Hi $LIST, According to Mike#1, who currently attends DebConf in Montreal, Debian 9 + X2Go Stable + KDE5/Plasma have been shown to work together. This is a single report so far, though. If anyone is willing and able to test and confirm this, it would be highly appreciated. Another test result we'd be interested in would be what happens if you use Arctica NX-Libs and X2Go Heuler instead of X2Go Stable. Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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Debugging Server Side Issues
by Robert Dinse 01 Aug '18

01 Aug '18

I've installed x2goserver on Enso, a Ubuntu derived Linux. It works find as root, but as a non-root user it fails. In syslog on the server I see the following: Jul 28 18:44:08 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 1). Jul 28 18:44:08 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 2). Jul 28 18:44:08 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 3). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 4). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 5). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 6). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 7). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 8). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 9). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: no free display number available, cannot start new session. Retrying (run 10). Jul 28 18:44:09 enso /usr/bin/x2gostartagent: Unable to find free display port or insert new session into database; parameters: port (50), hostname (enso) and session name (). Since it works as root I'm assuming a permission issue somewhere but I have no idea where to look. Any suggestions? -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 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.

2 2

execute xmodmap on resume
by richard lucassen 31 Jul '18

31 Jul '18

Hello list, Not an x2go problem, but maybe someone might be able to guess what is happening here. I made a chmod 755 shell script: $ cat /usr/lib/x2go/extensions/post-resume.d/010-xmodmap #!/bin/dash test -f ~/.Xmodmap || exit 0 /usr/bin/xmodmap -display $DISPLAY ~/.Xmodmap When resuming an x2go session, the script is executed, but x2go session starts but does not show up. The problem is that in one or another way, the xmodmap executable is waiting for something, but I have no idea what. Putting the xmodmap line to the background using an "&" makes the x2go session start, but the xmodmap mappings are not set. I still have to set the key mappings manually by invoking "xmodmap ~/.Xmodmap". Anyone a hint on what's going on here? R. -- richard lucassen http://contact.xaq.nl/

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If you are a novice X2Go user, and you can read German, this might be of interest for you.
by Stefan Baur 20 Jul '18

20 Jul '18

Hi List, X2Go has been covered by one of Germany's most well-known and well-renowned computer magazines, namely c't. The issue will hit the newsstands today, Saturday, July 21, 2018. It's the 16/2018 issue and the article starts on page 154. This article is meant for beginners; it covers the basics of setting up X2GoServer (on Ubuntu 18.04 LTS) and X2GoClient (on Ubuntu 18.04 LTS as well as on Windows 10), and shows you how to use X2GoClient's single application, published application, and desktop environment modes, as well as its built-in file sharing feature. It also teaches you how to kill, or suspend and resume, a session, and how to get better browser performance than with regular Firefox or Chrome. If you prefer to buy and/or read it online, there are several ways of doing so: You can click on <http://ct.de/y9y2>, where you can access the link list and comment section for free - so it's worth clicking even if you don't intend to buy the article/the magazine. If you scroll up on that page, you will find a button to buy the single article using a credit card, and another button for paypal payments. Scroll up even further, and you can read the teaser text for the article. Or, you can visit <https://shop.heise.de/ct_1coa1807> and sign up for a free three-issue digital subscription (Warning: It will turn into a paid subscription if you don't cancel it in time) of the full c't magazine, Last, you can buy the full c't magazine, limited to the current edition, no unwanted subscription, online, either in PDF form by clicking here <https://shop.heise.de/katalog/c-t-16-2018-pdf?wt_pdsrc=category_c_t_magazin…>, or in paper, delivered to your postal address, by clicking here <https://shop.heise.de/zeitschriften/ct/magazin>. Assuming sufficient reader interest, there may be follow-up articles covering: * the various connection options and connection types, * using SSH key files, SSH Agents, and 2FA with one-time passwords like Google Authenticator or OATH TOTP, * using SSH proxies (Jump Hosts) as well as HTTP proxies, * the use of custom published application menus, * Session Shadowing, * Xinerama, * the various clipboard and keyboard settings, * Desktop Icons, * Client-Side Printing, * X2Go-TCE, and, last but not least, * the Session Broker. So if you're interested in learning more about any of these topics, in German, please either register a free account and leave a comment in the comment section on <http://ct.de/y9y2>, or send an E-Mail to the editor we've been assigned, Merlin Schumacher, <mls(a)ct.de>, and let him know which X2Go topics you would like to see covered in one of the next editions. Kind Regards, Stefan Baur (who happens to be the author of the article) -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

1 0

disappearing X window
by Andrew Munn 19 Jul '18

19 Jul '18

When reconnecting to a session the window appears briefly then disappears. The ssh session is still up. The only way I can get back into the session is if I go in the client and change it to fullscreen and then reconnect.

1 0

using a xfce compositor with x2go server/client
by Tim Klassen 14 Jul '18

14 Jul '18

I've just installed x2go server on a new desktop running linux mint 19 xfce. (My client is on Ubuntu 14.04.) I was disappointed to find that the xfce doesn't work with this setup. Have I done something wrong? Are there any other ways that I can get a compositor to work with x2go?

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x2go-user July 2018