There are two different factors at play here:
- The info-beamer OS has to install the configured setup again after booting up.
- The configured setup has to run without a proper time
You can see which one affects you by looking at the screen: If you still see the info-beamer boot screen, it’s 1. If the boot screen disappeared and you see a black screen or other messages, it’s 2.
1: There is a race condition in the current stable release that sometimes causes the setup to not install even if all files required are locally cached. This is fixed in the next release. If you want, you can test this by installing the testing release of the OS.
2: Some setups by their design need a correct time: Most video walls are synchronized by the wall clock, so without proper time, it’s impossible to do that. They might be changed to work regardless by somehow making the devices talk to each other, but that’s a whole bundle of additional complexity and source of problems. For example: Some WiFi networks don’t allow devices to communicate with each other (“client isolation”) at all. The Scheduled Player was recently fixed, so playlists that are always schedule also play if there is no correct time set yet.
Which Package are you using for your setups?