Teacher Demonstration Mode Unusably Slow
We recently decided to try Veyon as a way to support students in our lab, as some computers are 40-50 ft from the projector screen. We were formerly using LanSchool 8 off and on.
We have a laboratory of 30 computers, all individually wired to a single gigabit switch. Prior to the start of school term, the software appeared promising, thumbnails updated rapidly, screen control was equally responsive. Once the year started, however, performance degraded to the point of being unusable.
Some machines fail to update in thumbnail mode (approximately 15%). The more crucial issue is that in screen demonstrate mode, students at best receive a screen update every 30-45 seconds. If I actively ping a student system while in demonstration mode, responses are in the 500ms+ range.
I have adjusted every setting I can think of on the student stations, lowering thumbnail updates to the maximum (think it was 5k or 10k ms), but it has not improved performance. We are at our wits ends trying to get this to work. Stations are mapped by MAC address in our classroom lists. While the new school year has brought increased network load, it doesn't explain why Veyon is so catastrophically slow compared to LanSchool and AB Tutor.
LanSchool, while buggy, updates reliably, with thumbnails able to update every 3-5 seconds, and live demonstrations operating at roughly 10 fps. AB Tutor had mildly better performance in live demonstration, but slightly worse performance in thumbnails.
These are Dell Gen 10 i7 machines with 16GB of RAM and NVidia Quaddro P2000 cards. Prior to installing Veyon, it was a fresh Windows 10 system image. Our district IT includes TightVNC in our system images. I'm not sure if this could potentially conflict with Veyon's VNC implementation.
Any thoughts? While we're not averse to paying for software, we were really hoping to buy the packages from Veyon rather than go back to LanSchool or other subscription-model services.