What's the output of systemctl status veyon? Maybe you need to enable the Veyon Service via systemctl enable veyon?

@studentloans999 Did you change the access group of the public key file to "Guest" or "Everyone" after importing? BTW the authentication test will only work on the master computer since it tests whether a private key file is readable and matches the public key file, so it's not an error if it "fails" on the client computers.

Hi, There is a way, besides of Veyon which could meet easily your need, and give you ideas : BGinfo. https://docs.microsoft.com/en-us/sysinternals/downloads/bginfo This is a small exe launched automaticaly at each start up of a computer and stopped immédiately after : function : create a desktop wallpaper with the information you may need, color wished etc... Then you can have: user name, host, group, IP, MAC... you can chose position and size of all this. for me top right, about 1cm height characters (i can see them in real from my desk and from veyon also) [image: 1618611333680-bginfo.png] Good luck

Have you verified that the key pair IDs are identical on all computers? Did you set the access group for public and private key files properly? The public key file needs to be readable by everyone/guest on all computers while the private key file should be accessible by Veyon Master users on the teacher computers.

@fred Ahhhhhh, very smart and so easy. Thank you!

Does the chromebooks have Linux (beta)? Or blocked by admins?

@itguy Thank you. will follow steps given and update

@drewloker said in 4.4.2 - Downgrade options? CRASHES Master and Clients, No Demo: Demo still doesn't work. I brought the whole lab up to 4.5.4.0 It went to Demo, showed my screen for a few second on a couple of the 7 students logged in a lab of 26 clients. Then, Demo stopped working even on the couple that did get my screen. I was able to back out of Demo mode with out crashing their computer. Hello i have the same problem .. i opened a new topic: https://veyon.nodebb.com/topic/1258/veyon-4-5-4-vnc-serveur-crash-on-demo-mode where I put the logs to see if tobydox manages to understand what is wrong ... Fred

Yes it is laggy. I love to let my students play. They usually complain about lag. I have decided to test this. I told on of the students to keep there game open and leave. I opened the app it was laggy and the lag stopped when I closed it.

I do have quite the same experience with a number of 25 computers in wifi. You can probably increase the response by having the master on RJ45 network cable if possible.

Yes, /NoStartMenuFolder is indeed the correct option. Thank you for pointing out the missing entry in the documentation which just has been added.

maybe in the new release (4.5.4) this bug has been solved

Figured it go to registry Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System Add a DWORD 32 BIT VALUE name it DisableTaskMgr and the value is 1. Windows 10. Do the same here to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System. It works on all verison of Window 10. Even Home.

@alexia74 Can you mention any information about it such as issues. Screenshots and show us the settings. Maybe we can resolve the issue we need further information.

@norbinyo I mean the configuration page "Locations & computers" in the Veyon Configurator program where you added all the computers It would be interesting to see if there's a problem with hostnames.

The VariantArrayMessage messages are interesting. They seem to indicate some kind of protocol incompatibility issue between master and client computers. Did you compile Veyon on your own on Linux Mint? If so, which version of Qt 5 is installed? Regarding the screenshot warning: thanks for pointing that out! I just fixed the issue which will also be part of the upcoming 4.5.3 release.

@glew_ Monitoring/controlling student's computers at home is not possible. You would need to use VPN solutions to make the computers accessible in general and then also have the students install the Veyon Service – likely not feasible All I can suggest for the moment is to use meeting tools which allow students to share their screens.