I guess I'm the kind of person that can spot a systemd screen from across the room now

Probably installed as a unit, computer with monitor. Perhaps a modifed version of a Linux OS?

The thing that gets me is that they seem to have a separate machine for each display

Every one of them is running a crypominer

Probably there for "easily changing out logos of different flavor instead of using paper/plastic printout"

Not just to show the logo, but to run the entire machine. Probably IoT enabled, so monitoring and maintenance actions and OTA are important enough that it’s worth having a very slim version of Linux on there instead of taking the security risk of building up from a lower level.

The computer controls the whole machine the logo part is a bonus. It also changes to like a do not use when Its not frozen or out of order.

So working on ad machines before a lot of them connect to an external ftp site to pull down the latest version of the logo. Things like this you don’t care if it’s secure or not

I've never seen one of these, but I assume it performs other functions - surely monitoring sensors, probably reporting that data, maybe allowing triggering maintenance functions, etc.

That said, processing and storage is so cheap on this scale that it's probably better (and cheaper) to go with a tried and true, widely supported system, than it is to optimize with custom hardware/firmware.

a whole linux system isn't even all that crazy. if it runs doom it can probably also run linux so probably everything from a potato to a dog's left testicle can run linux.

I feel like that isn't that far fetched, considering this machine probably has some sort of Internet connectivity so you can update the labels remotely and do other remote maintenance/monitoring tasks.

Wouldn't be surprised if they ran animated splash.

Hell, wouldn't be surprised if they started pushing ads through the screens.

200ml tequila 400mg ritalin 3mg lsd 3 scoops vanilla(? Need help with the flavor) ice cream 200ml milk or plain yogurt

Salt rim with cocaine and ascorbic acid sip gently.

Edit: do not drink this. This is the second most dangerous coctail recipe I've ever written.

With illegal amounts of alcohol, caffeine, and ketamine

gotta be something with cream(derivative) and citrus.

Or at least how to run DOOM on it.

The flash memory the OS is stored on is borked.

Filesystem check shows dependency errors attempting to check ext4 fs on /dev/mmcblk0p2. Assuming ext4 and fsck are installed (it should be if this isn't a mega-custom ultra stripped down private distribution) this shouldn't be possible.

Further down networking fails to initialize leading to a bunch of fails before it succeeds and reaches its target, only to be stopped by the dependency errors again.

Internet of Slurp

I wonder if there is a refill cartridge with the flavour in it that the OS reads from to always display the right logo. Or maybe a touchscreen that the workers use to change it manually.

It's failing storage, top half of the display is EXT4 complaining it can't read the SD card, bottom half is the result of that, services can't start.

That only works on hackers

Ba ma zu na la amu pa go lu ne me a ba du?

didn't systemd add a bsod equivalent some months ago? iirc optional default off so nobody will ever see it?

Lol I think people are missing the BSOD reference