It seems that I have an issue with a software : Rollback RX Pro. If i restart Veyon service, the connection is OK. If i restart Rollback service, Veyon is disconnecting. It seems that Rollback is closing Veyon waiting port 11100. But rollback seems to not use this port... I sent an email ton Rollback support ta have potential answers

consider using key authentication may solve your problem.

Install Ubuntu 20.04.1 Name: "student" "01"-pc Password: 789qwe@ Update and Upgrade SSH sudo apt install openssh-server sudo service ssh status sudo ufw allow ssh sudo service ssh restart Enter the user as sudoers - /etc/sudoers Open the terminal Use the sudo nano command Modify the file using nano, on the last line add "student01-pc ALL=(ALL) NOPASSWD: ALL Save the nano with CTRL+O Veyon Download from GitHub https: //github. com /veyon/ veyon/ releases/ tag/v4.8.0 (It is recognized as a link. Please join the parts, otherwise it won't let me post.) (I use this version; it always works for me) I always install it using the Ubuntu program installer. Configure and Test the keys Extension Install gnome-shell-extension-prefs Disable desktop icons Disable unused software Install the package sudo apt-get install gnome-tweaks Open "Settings" -- First tab "General" --- Turn off "Animations" It works like this here: if I don't follow this order, I can't get Veyon to work. It doesn't allow access to the keychain, which is basically what it needs to locate the machine. In case of problems, I use ssh to stop the service with sudo systemctl stop Veyon and start it again with sudo systemctl start Veyon

When using "Query nested user groups" veyon master takes 3 long minutes to launch, so WOL for the other solution would be appreciated !

Thanks a lot, I will try it!

No one else has wake on lan problems ?

Bonjour, j'ai eu le même souci, et ça venait de notre serveur DNS qui faisait des doublons d'enregistrements pour certains PC.

DE: Wir haben vor ein paar Tagen herausgefunden, dass dieses Problem erscheint, wenn 2 Monitore am PC verbunden sind und zwar, wenn es auf „Erweitert“ eingestellt ist. Leider hat uns das nicht weitergebracht, da wir 2 Bildschirme auch brauchen. Ansonsten haben wir nichts Neues über dieses Skalierungsproblem bei der Demo-Funktion herausgefunden. ENG: We found out a few days ago that this problem appears when 2 monitors are connected to the PC, specifically when it is set to “Extended.” Unfortunately, that didn’t help us any further, since we also need 2 screens. Apart from that, we haven’t discovered anything new about this scaling problem with the demo function.

Hello, is there really no way to temporarily disable and re-enable a network printer on the student notebook? Has nobody tried to realise this yet? Greetings, Susanne Hallo, gibt es wirklich keine Möglichkeit, einen Netzwerkdrucker kurzzeitig am Schülernotebook zu deaktivieren und wieder freizuschalten? Hat das noch niemand versucht zu realisieren? Grüße, Susanne

Same problem ! Some clients connect and then are no longer visible. Others never connect. Same effect with 24h2 and Veyon 4.8.2

Forget this, ive found a reference to my problem and is solved. The problem was that the PC user has the same name than the PC. Changed that and the message starts to appear. https://veyon.nodebb.com/topic/99/sending-message-on-client-computers