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    half of my lab stopped working!

    Help & Troubleshooting
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    • H
      hammergil last edited by

      I have a lab of 17 Ubuntu laptops. Everything was working fine. Did system updates this morning. Now 7 of the 17 computers work, the rest, the session crashed.

      This is the errors I get, any help would be appreciated!

      2021-08-10T13:24:24.470: [WARN] LinuxServiceCore: server for session "/org/freedesktop/login1/session/c2" still running - killing now
      2021-08-10T13:24:27.491: [WARN] QProcess: Destroyed while process ("/usr/bin/veyon-server") is still running.

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      • H
        hammergil @hammergil last edited by

        Another clue.
        When I start up the Lab PC's, it seems that Veyon is running as I can see the veyon icon in the task bar. However, when the master tries to connect, veyon crashes. I will try to generate new keys later and see if it does anything.

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        • H
          hammergil @hammergil last edited by

          Nope. Even with a new key, veyon is running on client until I open master on the master computer and then it crashes.

          I have tried uninstalling and reinstalling veyon on client as well, no joy.

          I hope someone can help as school just started today!

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          • tobydox
            tobydox last edited by tobydox

            It looks like we have a regression in 4.5.7 affecting some Linux users 😞 Can set the log level to "Debug" on the affected computers and see if you can get additional information fromjournalctl -u veyon, /tmp/VeyonService.log and /tmp/VeyonServer.log?

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            • tobydox
              tobydox last edited by

              FYI: updated packages (4.5.7-2) for Ubuntu are available in the PPA which revert one change in the 4.5.7 which is suspected to cause the problems. Please report back if everything is OK again after upgrading.

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              • H
                hammergil @tobydox last edited by

                @tobydox
                journalctl -u veyon produces these errors:
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.952: [DEBUG] PluginManager::loadPlugins(): discovered plugin "AuthKeys" at "/usr/lib/x86_64-linux-gnu/veyon/authkeys.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.954: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinX11VncServer" at "/usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinDirectory" at "/usr/lib/x86_64-linux-gnu/veyon/builtindirectory.
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Config" at "/usr/lib/x86_64-linux-gnu/veyon/config.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Demonstration" at "/usr/lib/x86_64-linux-gnu/veyon/demo.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "DesktopServices" at "/usr/lib/x86_64-linux-gnu/veyon/desktopservices.so
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ExternalVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/external-vnc-ser
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "FileTransfer" at "/usr/lib/x86_64-linux-gnu/veyon/filetransfer.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "HeadlessVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/headless-vnc-ser
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "LDAP Basic" at "/usr/lib/x86_64-linux-gnu/veyon/ldap.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "PowerControl" at "/usr/lib/x86_64-linux-gnu/veyon/powercontrol.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "RemoteAccess" at "/usr/lib/x86_64-linux-gnu/veyon/remoteaccess.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ScreenLock" at "/usr/lib/x86_64-linux-gnu/veyon/screenlock.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Screenshot" at "/usr/lib/x86_64-linux-gnu/veyon/screenshot.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ServiceControl" at "/usr/lib/x86_64-linux-gnu/veyon/servicecontrol.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Shell" at "/usr/lib/x86_64-linux-gnu/veyon/shell.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "SystemUserGroups" at "/usr/lib/x86_64-linux-gnu/veyon/systemusergroups.
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "TextMessage" at "/usr/lib/x86_64-linux-gnu/veyon/textmessage.so"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.962: [DEBUG] PluginManager::loadPlugins(): discovered plugin "UserSessionControl" at "/usr/lib/x86_64-linux-gnu/veyon/usersessioncont
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.962: [DEBUG] VeyonCore::initSystemInfo(): "4.5.7" "11-gilpin-lab" "linux" "5.4.0-80-generic" "Ubuntu 18.04.5 LTS" "ubuntu" "18.04"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.965: [DEBUG] ServiceDataManager::ServiceDataManager():
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.965: [DEBUG] PlatformSessionManager::PlatformSessionManager():
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.966: [DEBUG] LinuxServiceCore::connectToLoginManager(): connected to login manager
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.972: [DEBUG] PlatformSessionManager::openSession(): Opening session 0 for platform session "/org/freedesktop/login1/session/_36"
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.972: [INFO] LinuxServiceCore::startServer(): Starting server for new session "/org/freedesktop/login1/session/_36" with ID 0 at seat
                Aug 13 07:31:34 11-gilpin-lab veyon-service[3028]: 2021-08-13T07:31:34.973: [ERR] LinuxServiceCore::startServer(): Can't start Veyon Server in Wayland sessions as this is not yet supported. Please switch

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                • H
                  hammergil @tobydox last edited by

                  @tobydox
                  /tmp/VeyonService.log

                  [sudo] password for david:
                  2021-08-13T07:29:31.530: [ERR] LinuxServiceCore: Can't start Veyon Server in Wayland sessions as this is not yet supported. Please switch to X11-based sessions!
                  2021-08-13T07:31:34.952: [DEBUG] PluginManager::loadPlugins(): discovered plugin "AuthKeys" at "/usr/lib/x86_64-linux-gnu/veyon/authkeys.so"
                  2021-08-13T07:31:34.954: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinX11VncServer" at "/usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc-server.so"
                  2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinDirectory" at "/usr/lib/x86_64-linux-gnu/veyon/builtindirectory.so"
                  2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Config" at "/usr/lib/x86_64-linux-gnu/veyon/config.so"
                  2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Demonstration" at "/usr/lib/x86_64-linux-gnu/veyon/demo.so"
                  2021-08-13T07:31:34.955: [DEBUG] PluginManager::loadPlugins(): discovered plugin "DesktopServices" at "/usr/lib/x86_64-linux-gnu/veyon/desktopservices.so"
                  2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ExternalVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/external-vnc-server.so"
                  2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "FileTransfer" at "/usr/lib/x86_64-linux-gnu/veyon/filetransfer.so"
                  2021-08-13T07:31:34.956: [DEBUG] PluginManager::loadPlugins(): discovered plugin "HeadlessVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/headless-vnc-server.so"
                  2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "LDAP Basic" at "/usr/lib/x86_64-linux-gnu/veyon/ldap.so"
                  2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "PowerControl" at "/usr/lib/x86_64-linux-gnu/veyon/powercontrol.so"
                  2021-08-13T07:31:34.960: [DEBUG] PluginManager::loadPlugins(): discovered plugin "RemoteAccess" at "/usr/lib/x86_64-linux-gnu/veyon/remoteaccess.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ScreenLock" at "/usr/lib/x86_64-linux-gnu/veyon/screenlock.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Screenshot" at "/usr/lib/x86_64-linux-gnu/veyon/screenshot.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ServiceControl" at "/usr/lib/x86_64-linux-gnu/veyon/servicecontrol.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Shell" at "/usr/lib/x86_64-linux-gnu/veyon/shell.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "SystemUserGroups" at "/usr/lib/x86_64-linux-gnu/veyon/systemusergroups.so"
                  2021-08-13T07:31:34.961: [DEBUG] PluginManager::loadPlugins(): discovered plugin "TextMessage" at "/usr/lib/x86_64-linux-gnu/veyon/textmessage.so"
                  2021-08-13T07:31:34.962: [DEBUG] PluginManager::loadPlugins(): discovered plugin "UserSessionControl" at "/usr/lib/x86_64-linux-gnu/veyon/usersessioncontrol.so"
                  2021-08-13T07:31:34.962: [DEBUG] VeyonCore::initSystemInfo(): "4.5.7" "11-gilpin-lab" "linux" "5.4.0-80-generic" "Ubuntu 18.04.5 LTS" "ubuntu" "18.04"
                  2021-08-13T07:31:34.965: [DEBUG] ServiceDataManager::ServiceDataManager():
                  2021-08-13T07:31:34.965: [DEBUG] PlatformSessionManager::PlatformSessionManager():
                  2021-08-13T07:31:34.966: [DEBUG] LinuxServiceCore::connectToLoginManager(): connected to login manager
                  2021-08-13T07:31:34.972: [DEBUG] PlatformSessionManager::openSession(): Opening session 0 for platform session "/org/freedesktop/login1/session/_36"
                  2021-08-13T07:31:34.972: [INFO] LinuxServiceCore::startServer(): Starting server for new session "/org/freedesktop/login1/session/_36" with ID 0 at seat "/org/freedesktop/login1/seat/seat0"
                  2021-08-13T07:31:34.973: [ERR] LinuxServiceCore::startServer(): Can't start Veyon Server in Wayland sessions as this is not yet supported. Please switch to X11-based sessions!

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                  • H
                    hammergil @tobydox last edited by

                    @tobydox

                    cat /tmp/VeyonServer.log

                    2021-08-13T07:31:34.988: [DEBUG] PluginManager::loadPlugins(): discovered plugin "AuthKeys" at "/usr/lib/x86_64-linux-gnu/veyon/authkeys.so"
                    2021-08-13T07:31:34.990: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinX11VncServer" at "/usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc-server.so"
                    2021-08-13T07:31:34.990: [DEBUG] PluginManager::loadPlugins(): discovered plugin "BuiltinDirectory" at "/usr/lib/x86_64-linux-gnu/veyon/builtindirectory.so"
                    2021-08-13T07:31:34.990: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Config" at "/usr/lib/x86_64-linux-gnu/veyon/config.so"
                    2021-08-13T07:31:34.990: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Demonstration" at "/usr/lib/x86_64-linux-gnu/veyon/demo.so"
                    2021-08-13T07:31:34.991: [DEBUG] PluginManager::loadPlugins(): discovered plugin "DesktopServices" at "/usr/lib/x86_64-linux-gnu/veyon/desktopservices.so"
                    2021-08-13T07:31:34.991: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ExternalVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/external-vnc-server.so"
                    2021-08-13T07:31:34.991: [DEBUG] PluginManager::loadPlugins(): discovered plugin "FileTransfer" at "/usr/lib/x86_64-linux-gnu/veyon/filetransfer.so"
                    2021-08-13T07:31:34.991: [DEBUG] PluginManager::loadPlugins(): discovered plugin "HeadlessVncServer" at "/usr/lib/x86_64-linux-gnu/veyon/headless-vnc-server.so"
                    2021-08-13T07:31:34.995: [DEBUG] PluginManager::loadPlugins(): discovered plugin "LDAP Basic" at "/usr/lib/x86_64-linux-gnu/veyon/ldap.so"
                    2021-08-13T07:31:34.995: [DEBUG] PluginManager::loadPlugins(): discovered plugin "PowerControl" at "/usr/lib/x86_64-linux-gnu/veyon/powercontrol.so"
                    2021-08-13T07:31:34.996: [DEBUG] PluginManager::loadPlugins(): discovered plugin "RemoteAccess" at "/usr/lib/x86_64-linux-gnu/veyon/remoteaccess.so"
                    2021-08-13T07:31:34.996: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ScreenLock" at "/usr/lib/x86_64-linux-gnu/veyon/screenlock.so"
                    2021-08-13T07:31:34.996: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Screenshot" at "/usr/lib/x86_64-linux-gnu/veyon/screenshot.so"
                    2021-08-13T07:31:34.996: [DEBUG] PluginManager::loadPlugins(): discovered plugin "ServiceControl" at "/usr/lib/x86_64-linux-gnu/veyon/servicecontrol.so"
                    2021-08-13T07:31:34.997: [DEBUG] PluginManager::loadPlugins(): discovered plugin "Shell" at "/usr/lib/x86_64-linux-gnu/veyon/shell.so"
                    2021-08-13T07:31:34.997: [DEBUG] PluginManager::loadPlugins(): discovered plugin "SystemUserGroups" at "/usr/lib/x86_64-linux-gnu/veyon/systemusergroups.so"
                    2021-08-13T07:31:34.997: [DEBUG] PluginManager::loadPlugins(): discovered plugin "TextMessage" at "/usr/lib/x86_64-linux-gnu/veyon/textmessage.so"
                    2021-08-13T07:31:34.997: [DEBUG] PluginManager::loadPlugins(): discovered plugin "UserSessionControl" at "/usr/lib/x86_64-linux-gnu/veyon/usersessioncontrol.so"
                    2021-08-13T07:31:34.998: [DEBUG] VeyonCore::initSystemInfo(): "4.5.7" "11-gilpin-lab" "linux" "5.4.0-80-generic" "Ubuntu 18.04.5 LTS" "ubuntu" "18.04"
                    2021-08-13T07:31:34.998: [DEBUG] FeatureWorkerManager::startUnmanagedSessionWorker(): Starting worker (unmanaged session process) for feature QUuid("{8e997d84-ebb9-430f-8f72-d45d9821963d}")
                    2021-08-13T07:31:34.999: [DEBUG] VncProxyServer::start(): started on port 11100
                    2021-08-13T07:31:34.999: [DEBUG] VncServer::prepare():
                    2021-08-13T07:31:34.999: [DEBUG] VncServer::run(): running
                    2021-08-13T07:31:35.003: [DEBUG] VeyonCore::exec(): Running
                    2021-08-13T07:31:35.100: [DEBUG] FeatureWorkerManager::acceptConnection(): accepting connection
                    2021-08-13T07:31:35.229: [DEBUG] ServerAuthenticationManager::processAuthenticationMessage(): state VncServerClient::AuthState(Init) type RfbVeyonAuth::Type(KeyFile) host "::ffff:172.16.0.42" user "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.237: [DEBUG] ServerAuthenticationManager::processAuthenticationMessage(): state VncServerClient::AuthState(Challenge) type RfbVeyonAuth::Type(KeyFile) host "::ffff:172.16.0.42" user "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.238: [DEBUG] ServerAuthenticationManager::performKeyAuthentication(): loaded public key from "/etc/veyon/keys/public/asus2/key"
                    2021-08-13T07:31:35.238: [DEBUG] ServerAuthenticationManager::performKeyAuthentication(): SUCCESS
                    2021-08-13T07:31:35.238: [DEBUG] AccessControlProvider::checkAccess(): no access control method configured, allowing access.
                    2021-08-13T07:31:35.239: [INFO] ComputerControlServer::showAccessControlMessage(): Access control successful for "::ffff:172.16.0.42" "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.406: [DEBUG] VncClientProtocol::receiveSecurityResult(): authentication successful
                    2021-08-13T07:31:35.495: [DEBUG] ServerAuthenticationManager::processAuthenticationMessage(): state VncServerClient::AuthState(Init) type RfbVeyonAuth::Type(KeyFile) host "::ffff:172.16.0.42" user "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.505: [DEBUG] ServerAuthenticationManager::processAuthenticationMessage(): state VncServerClient::AuthState(Challenge) type RfbVeyonAuth::Type(KeyFile) host "::ffff:172.16.0.42" user "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.506: [DEBUG] ServerAuthenticationManager::performKeyAuthentication(): loaded public key from "/etc/veyon/keys/public/asus2/key"
                    2021-08-13T07:31:35.506: [DEBUG] ServerAuthenticationManager::performKeyAuthentication(): SUCCESS
                    2021-08-13T07:31:35.507: [DEBUG] AccessControlProvider::checkAccess(): no access control method configured, allowing access.
                    2021-08-13T07:31:35.507: [INFO] ComputerControlServer::showAccessControlMessage(): Access control successful for "::ffff:172.16.0.42" "LAPTOP-A7LR00H9\gilpi"
                    2021-08-13T07:31:35.813: [DEBUG] VncClientProtocol::receiveSecurityResult(): authentication successful
                    2021-08-13T07:31:36.009: [DEBUG] FeatureManager::handleFeatureMessage(): feature "UserSessionInfo" command 0 arguments QMap()
                    2021-08-13T07:31:36.010: [DEBUG] ComputerControlServer::sendFeatureMessageReply(): QUuid("{79a5e74d-50bd-4aab-8012-0e70dc08cc72}") 0 QMap(("0", QVariant(QString, ""))("1", QVariant(QString, ""))("2", QVariant(int, -1)))
                    2021-08-13T07:31:36.010: [DEBUG] FeatureManager::handleFeatureMessage(): feature "FeatureControl" command 0 arguments QMap()
                    2021-08-13T07:31:36.010: [DEBUG] ComputerControlServer::sendFeatureMessageReply(): QUuid("{a0a96fba-425d-414a-aaf4-352b76d7c4f3}") 0 QMap(("0", QVariant(QStringList, ("{8e997d84-ebb9-430f-8f72-d45d9821963d}"))))
                    2021-08-13T07:31:37.156: [DEBUG] FeatureManager::handleFeatureMessage(): feature "FeatureControl" command 0 arguments QMap()
                    2021-08-13T07:31:37.156: [DEBUG] ComputerControlServer::sendFeatureMessageReply(): QUuid("{a0a96fba-425d-414a-aaf4-352b76d7c4f3}") 0 QMap(("0", QVariant(QStringList, ("{8e997d84-ebb9-430f-8f72-d45d9821963d}"))))
                    2021-08-13T07:31:37.156: [DEBUG] FeatureManager::handleFeatureMessage(): feature "UserSessionInfo" command 0 arguments QMap()
                    2021-08-13T07:31:37.156: [DEBUG] ComputerControlServer::sendFeatureMessageReply(): QUuid("{79a5e74d-50bd-4aab-8012-0e70dc08cc72}") 0 QMap(("0", QVariant(QString, "david"))("1", QVariant(QString, "David Gilpin"))("2", QVariant(int, 0)))

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                    • H
                      hammergil @tobydox last edited by

                      @tobydox

                      The update did not help.

                      H 1 Reply Last reply Reply Quote 0
                      • H
                        hammergil @hammergil last edited by

                        @hammergil
                        After much time spent trying to get veyon to work on my Ubuntu 18.04 lab, and many days and weeks with not much support, I decided to end the suffering and move on. I did find an affordable paid option that I am using right now and it works great. Not only that but I did have a few issues after first install and the developer scheduled a zoom meeting with me on the same day of purchase and we got it all ironed out.

                        So, if you are using Ubuntu and like me are stumped. If you are looking for an affordable solution, I can recommend Classroom Spy at classroomspy.com. Does the same thing as Veyon and I think I paid a 1-time cost of $699 for 25 computers.

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