I believe that's the "Authentication" icon. How are you authenticating to the machines? Perhaps a missing authentication key on the client?

Hi, I have the same problem with my laptop mouse. The USB mouse stops working. The touchpad works. How do I fix this?

SOLVED: solved the problem. need to disable the virtual network card created by Virtual Box.

welp it was x11vnc that was miss behaving because I am on wayland. Fix it by changing the vnc server.

[image: 1761139372960-capture-d-%C3%A9cran-2025-10-22-152130.png]

Hello, The same problem here. When I log in from “Remote Control,” when I enter my username and password containing @ and press the ALT+GR key, it enters that strange character. In my case, when connected remotely to the machine, nothing strange is displayed with the @, but when I try to enter it in a cmd, for example, I can see how it sends the same symbol with “?”. If you access the machines from Veyon itself with “Log in” instead of connecting to them remotely, it types and sends the @+ALT GR without any problems. I temporarily solve this by using ALT+64 in my case. For any other character, it would be necessary to find the corresponding number for that character in the ASCII table. Even so, as it affects passwords with special characters, it is tedious to work with this bug on a daily basis. If anyone finds a solution, that would be wonderful. Thanks in advance and best regards, [image: 1761051638988-error-veyon.png]

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