veyon-server doesn't start (Qt::AA_ShareOpenGLContexts must be set before QCoreApplication)
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Hi.
When I check the status von veyon on an Ubuntu 20.04 client I get this:sudo systemctl status veyon ● veyon.service - Veyon Service Loaded: loaded (/lib/systemd/system/veyon.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2021-05-27 11:09:42 CEST; 26min ago Docs: man:veyon-service(1) Main PID: 1519 (veyon-service) Tasks: 9 (limit: 9404) Memory: 46.3M CGroup: /system.slice/veyon.service ├─ 1519 /usr/bin/veyon-service └─81496 /usr/bin/veyon-worker {8e997d84-ebb9-430f-8f72-d45d9821963d} Mai 27 11:09:42 raum1-pc systemd[1]: Started Veyon Service. Mai 27 11:09:42 raum1-pc veyon-service[1519]: Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is >I'm not sure but is it possible (as a consequence of the last error) that veyon-server doesn't start?
Thank you? -
This is just a warning which has been fixed in Veyon 4.5.6 but unfortunately it's not related to the server start problem
Did you already try to enable advanced the "Write to logging system of operating system" option (https://docs.veyon.io/en/latest/admin/reference.html#logging) and change the log level to debug? You should then see the output of the
veyon-serverprocess in theveyon-serviceunit's journal. If the programcatchsegvis inPATH, it will be used to dump a possible backtrace of the server if it crashes. -
@tobydox
Hi. I enabled the Logfiles in Debug-Mode.
Now I found this:/tmp]$ tail VeyonService.log 2021-05-29T11:52:41.093: [INFO] LinuxServiceCore::startServer(): Starting server for new session "/org/freedesktop/login1/session/_32" with ID 0 at seat "/org/freedesktop/login1/seat/seat0" 2021-05-29T11:55:20.873: [ERR] LinuxServiceCore::startServer(): Can't start Veyon Server in Wayland sessions as this is not yet supported. Please switch to X11-based sessions! 2021-05-29T11:55:23.198: [DEBUG] PlatformSessionManager::closeSession(): Closing session 0 for platform session "/org/freedesktop/login1/session/_32" 2021-05-29T11:55:23.198: [INFO] LinuxServiceCore::stopServer(): stopping server for removed session "/org/freedesktop/login1/session/_32" 2021-05-29T11:55:35.946: [DEBUG] LinuxServiceCore::startServWhen I observe the process
veyon-servicewithcatchsegvI found this:29/05/2021 12:12:03 Xinerama: number of sub-screens: 1 29/05/2021 12:12:03 Xinerama: no blackouts needed (only one sub-screen) 29/05/2021 12:12:03 X11 MIT Shared Memory Attach failed: Is your DISPLAY=:0 on a remote machine? Suggestion, use: x11vnc -display :0 ... for local display :0 caught X11 error: 29/05/2021 12:12:03 deleted 32 tile_row polling images. X Error of failed request: BadAccess (attempt to access private resource denied) Major opcode of failed request: 130 (MIT-SHM) Minor opcode of failed request: 1 (X_ShmAttach) Serial number of failed request: 57 Current serial number in output stream: 91And afterwards the same with
veyon-server:2021-05-29T12:15:35.158: [DEBUG] VeyonCore::initSystemInfo(): "4.5.5" "fossa.my-domain.de" "linux" "5.8.0-53-generic" "Ubuntu 20.04.2 LTS" "ubuntu" "20.04" 2021-05-29T12:15:35.166: [ERR] VncServer::VncServer(): no VNC server plugins found! 2021-05-29T12:15:35.196: [DEBUG] [KLDAP] connection closed! 2021-05-29T12:15:35.196: [DEBUG] [KLDAP] ldap url: "ldap://server.my-domain.de:3268" 2021-05-29T12:15:35.197: [DEBUG] [KLDAP] setting version to: 3 2021-05-29T12:15:35.197: [DEBUG] [KLDAP] setting timeout to: 0 2021-05-29T12:15:35.197: [DEBUG] [KLDAP] setting security to: 1 2021-05-29T12:15:35.197: [DEBUG] [KLDAP] start TLS 2021-05-29T12:15:35.264: [DEBUG] [KLDAP] setting sizelimit to: 0 2021-05-29T12:15:35.264: [DEBUG] [KLDAP] setting timelimit to: 0 2021-05-29T12:15:35.264: [DEBUG] [KLDAP] initializing SASL client 2021-05-29T12:15:35.264: [DEBUG] [KLDAP] binding to server, bindname: "<MY-SAMBA-DOMAIN>\\admin" password: ***** 2021-05-29T12:15:35.264: [DEBUG] [KLDAP] ldap_sasl_bind_s (simple) 2021-05-29T12:15:35.303: [DEBUG] FeatureWorkerManager::startUnmanagedSessionWorker(): Starting worker (unmanaged session process) for feature QUuid("{8e997d84-ebb9-430f-8f72-d45d9821963d}") 2021-05-29T12:15:35.304: [DEBUG] FeatureWorkerManager::sendMessageToUnmanagedSessionWorker(): User session likely not yet available - retrying worker start 2021-05-29T12:15:35.304: [DEBUG] VncProxyServer::start(): started on port 11100 2021-05-29T12:15:35.304: [DEBUG] VncServer::prepare(): 2021-05-29T12:15:35.304: [DEBUG] VeyonCore::exec(): Running 2021-05-29T12:15:35.305: [DEBUG] VeyonCore::exec(): Exit 2021-05-29T12:15:35.305: [DEBUG] ComputerControlServer::~ComputerControlServer(): 2021-05-29T12:15:35.305: [DEBUG] VncServer::~VncServer(): 2021-05-29T12:15:35.305: [DEBUG] Logger::~Logger(): Shutdown PluginManager::~PluginManager(): CryptoCore::~CryptoCore(): KLDAP: connection closed!Is this helpful?
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@tobydox said in veyon-server doesn't start (Qt::AA_ShareOpenGLContexts must be set before QCoreApplication):
-noshm
Wow -- I think that's the solution! I just added this option and restarted the Client -- now "htop" shows a running veyon-server ... I can't test it in our productive environment at the moment but it looks good so far! Thank you!
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@white_rabbit where do you add this parameter? Is it in the Veyon configuration interface somewhere?
