Optical Drive and udev/systemd not reliable

[poidi]

Hi There,

don't know if this is the right place, but if not, could you please direct me to a place whrer it might be better suited?

Our problem:

We do have an headleass appliance, that used to work with centOS 6.9. Now we updated to AlmaLinux 8.9 and have a problem regarding udev-notifications for inserting media into the slot-in drive.

Secnario A: CentOs 6.9 behaviour:
As soon as "something" was going on with the drive, there were couple of udev "change" events (disc inserted, disc spinning, reading, ejecting,...)

Scenario B: AlmaLinux 8.9 No KDE: (same hardware)
only if a correct filesystem is present, the udev "change" event is fired. If a heavily scratched disc, an empty on, or a disc inserted upside-down is inserted into the device, no notificaiton is triggered at all. The disc stays in the device indefinetly

Scenario C: AlmaLinux 8.9 KDE: (same hardware)
also no events are triggerd, but somehow after some time the disc will be ejcted.

We are kind of puzzled cause of the 2 questions:

1. why are there no change events for interacions of the device with the media
2. who triggers the eject in Scenario C?

thank you, if you could help us and get us in the right direction!
Poidi