Demo not working

[achar74]

Hello,

I'm working for a school in France and we have troubleshooting with the demonstration and the lock feature of Veyon
We can view and take the control on the student’s computer, start it, and shutdown it.

However the demonstration mode, and screen lock doesn’t work : nothing happen
The Veyon master turn on Windows 11 and the Veyon client on HP thin client (OS : HP Thin Pro 7.2 based of Ubuntu 18.04).

For testing, all functionalities work fine between two Windows 11 computers, but not on the Linux thin client : so it seems to be due of the configuration on the thin client.

Telnet on thin client not working for 11300/11400 ports
When start veyon-server : ERR main: Failed to start server LinuxSessionFunctions: Could not query session property "Class" "Unknown objet '/org/freedesktop/login1/session/auto'."

Have you any idea of the problem encountered ?

Thank you for taking the time.
Regards.

[tobydox]

Hello,

can you try to set the environment variable VEYON_SESSION_PATH to /org/freedesktop/login1/session/self and start veyon-server manually? Can you tell me the output of the commands

busctl get-property org.freedesktop.login1 /org/freedesktop/login1/session/auto org.freedesktop.login1.Session Class

and

busctl get-property org.freedesktop.login1 /org/freedesktop/login1/session/self org.freedesktop.login1.Session Class

?

Also where do you see theFailed to start server message? On the master computer on Windows?

[achar74]

@tobydox

Hi,

Thanks a lot.

One precision, the problem seems to be on the client, not on the master I think. Because, between master windows 11 and client windows 11, everthings work. But between the same master windows 11 and a Linux client, demo mode not working, nothing for the lockscreen too.

The error at the command veyon-server is on the Linux client, but i don't know if it need to be started on the client...

Here is the result on the Linux client :

Best regards.

[tobydox]

@achar74 There'll be various improvements for accessing the systemd session information via DBus in 4.7.3. It will be released next week so stay tuned (alternatively you can test the current test build packages available at https://github.com/veyon/veyon/releases/download/v4.7.2/veyon_4.7.2-31-ubuntu-bionic_amd64.deb and https://github.com/veyon/veyon/releases/download/v4.7.2/veyon_4.7.2-31-ubuntu-focal_amd64.deb). Possibly this also fixes your issues.